MEDCO RESEARCH INC
8-A12B, 1998-04-15
PHARMACEUTICAL PREPARATIONS
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                 --------------

                                    FORM 8-A

                FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                     PURSUANT TO SECTION 12(b) OR (g) OF THE
                         SECURITIES EXCHANGE ACT OF 1934



                              MEDCO RESEARCH, INC.
- --------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)


              Delaware                                 95-3318451
- --------------------------------------------------------------------------------
   (State or other Jurisdiction of                  (I.R.S. Employer
    incorporation or organization)                  Identification No.)


   85 T.W. Alexander Drive, Research Triangle Park, NC.   27709
- --------------------------------------------------------------------------------
   (Address of principal executive office)              (Zip Code)



Securities to be registered pursuant to Section 12(b) of the Act:

                                              Name of each exchange
           Title of each class                on which each class is
           to be so registered                to be registered
           -------------------                ----------------------

           Common Share Purchase              American Stock Exchange
            Rights


If this Form relates to the  registration  of a class of debt  securities and is
effective upon filing pursuant to General Instruction A.(c)(1), please check the
following box. [ ]

If this Form relates to the registration of a class of debt securities and is to
become  effective   simultaneously   with  the  effectiveness  of  a  concurrent
registration  statement  under the  Securities  Act of 1933  pursuant to General
Instruction A.(c)(2), please check the following box. [ ]

Securities to be registered pursuant to Section 12(g) of the Act:

                                      None
- --------------------------------------------------------------------------------
                                (Title of Class)




<PAGE>

Item 1.  Description of Securities To Be Registered.

                  On April 2, 1998, the Directors of Medco  Research,  Inc. (the
"Company")  declared a dividend  distribution  of one right (a "Right") for each
outstanding  Common  Share,without  par  value  (the  "Common  Shares"),  of the
Company.  The  distribution is payable on April 15, 1998 to the  shareholders of
record on of the close of business on April 14, 1998 (the "Record Date").

                  Each  Right  initially   entitles  the  registered  holder  to
purchase from the Company  one-half of one Common Share at a price of $92.00 per
whole share,  subject to adjustment (the "Purchase Price").  The description and
terms of the  Rights are set forth in a Rights  Agreement  dated as of April 14,
1998 (the "Rights  Agreement") between the Company and American Stock Transfer &
Trust Company, as Rights Agent (the "Rights Agent").

                  Until the earlier of (i) ten Business Days (or such later date
as the Board of Directors shall determine)  following a public announcement that
a person or group of affiliated or associated  persons (an  "Acquiring  Person")
has acquired,  or obtained the right to acquire,  beneficial ownership of 20% or
more of the outstanding  Common Shares, or (ii) ten Business Days (or such later
date as the Board of Directors shall determine)  following the commencement of a
tender offer or exchange offer for 20% or more of such outstanding Common Shares
(in each case without the prior approval of the Board of Directors)(the  earlier
of such dates being hereinafter called the "Distribution Date"), the Rights will
be evidenced,  with respect to any of the Common Share certificates  outstanding
as of the Record  Date,  by such Common  Share  certificate  with a copy of this
Summary of Rights attached  thereto.  The Rights Agreement  provides that, until
the  Distribution  Date, the Rights will be  transferred  with and only with the
Common Shares.  Until the Distribution Date (or earlier redemption or expiration
of the Rights),  new Common Share certificates issued after the Record Date upon
transfer or new issuance of Common Shares will contain a notation  incorporating
the Rights  Agreement  by  reference.  Until the  Distribution  Date (or earlier
redemption  or  expiration  of the Rights),  the  surrender  for transfer of any
certificates for Common Shares outstanding as of the Record Date, even without a
copy of this  Summary  of Rights  attached  thereto,  will also  constitute  the
transfer of the Rights  associated  with the Common Shares  represented  by such
certificate.  As soon as practicable  following the Distribution Date,  separate
certificates  evidencing the Rights (the "Right Certificates") will be mailed to
holders  of record of the  Common  Shares  as of the  close of  business  on the
Distribution Date and such separate Right  Certificates  alone will evidence the
Rights.

                  The Rights are not exercisable  until the  Distribution  Date.
The Rights will expire on April 15, 2008,  unless earlier redeemed or terminated
by the Company as described below.

                  The Purchase Price payable, and the number of Common Shares or
other securities or property  issuable,  upon exercise of the Rights are subject
to adjustment from time to time to prevent  dilution (i) in the event of a stock
dividend on, or a subdivision,  combination or  reclassification  of, the Common
Shares,  (ii) upon the grant to holders of the Common Shares of certain  rights,
options or warrants to subscribe for Common Shares or convertible  securities at
less than the  current  market  price of the  Common  Shares,  or (iii) upon the
distribution to holders of the Common Shares of evidences of indebtedness,  cash
(excluding  regular  periodic cash  dividends at a rate not in excess of 125% of
the rate of the last cash dividend  theretofore paid), assets, stock (other than
dividends  payable  in Common  Shares)  or of  subscription  rights,  options or
warrants (other than those referred to above).

                  In the event that an Acquiring  Person merges into the Company
and the  Company's  Common  Shares are not changed or  exchanged  or a person or
group of affiliated or associated  persons become the beneficial owner of 20% or
more of the Company's Common Shares, proper provision shall be made so that each
holder of a Right,  other than Rights that are or were beneficially owned by the
Acquiring  Person  after the date upon which the  Acquiring  Person  became such
(which will thereafter be void),  will thereafter have the right to receive upon
exercise  thereof at the then  current  Purchase  Price,  that  number of Common
Shares having a market value of two times the Purchase  Price (or, under certain
circumstances,  an amount of cash or other property or securities having a value
equal to the  Purchase  Price).  In the event that the Company is acquired by an
Acquiring Person in a merger or other business combination transaction or 50% or
more of its assets or earning power are sold to an Acquiring  Person (other than
in a transaction approved by the Company's shareholders), proper provision shall
be made so that  each  holder of a Right,  other  than  Rights  that are or were
beneficially  owned by the  Acquiring  Person  after  the date  upon  which  the
Acquiring  Person became such (which will thereafter be void),  shall thereafter
have the  right  to  receive,  upon the  exercise  thereof  at the then  current
Purchase Price,  that number of Common Shares (or, under certain  circumstances,
an economically  equivalent security or securities) of the surviving,  resulting
or acquiring  person which at the time of such  transaction  would have a market
value of two times the  Purchase  Price (or,  under  certain  circumstances,  an
amount of cash  equal to the  Purchase  Price.)  The Board of  Directors  of the
Company may, at its option, at any time after the later of the Distribution Date
and the first  occurrence  of a  Triggering  Event,  exchange all or part of the
then-outstanding and exercisable Rights (other than Rights owned by an Acquiring
Person) for Common Shares at an exchange ratio of one Common Share per Right.

                  With certain  exceptions,  no adjustment in the Purchase Price
will be required until cumulative  adjustments require an adjustment of at least
1% in the  Purchase  Price.  No  fractional  shares  will be issued  (other than
fractions which may, at the election of the Company,  be evidenced by depositary
receipts),  and in lieu  thereof,  a payment  in cash will be made  based on the
market  price of the Common  Shares on the last trading day prior to the date of
exercise.

                  The Company  may redeem the Rights in whole,  but not in part,
at a price of $0.01 per Right (the "Redemption  Price") at any time prior to the
later of (i) the Distribution Date and (ii) a public  announcement that a person
or group of affiliated or associated persons has acquired  beneficial  ownership
of 20% or more of the  outstanding  Common  Shares  (or such  later  date as the
Directors  may specify),  and,  under  certain  circumstances,  upon a merger or
consolidation  of the  Company  with  or  into  a  corporation  which  is not an
Acquiring  Person.  At the election of the Company,  the Redemption Price may be
payable in cash, Common Shares, or such other consideration as the Company deems
appropriate.  Immediately  upon  the  action  of the  Directors  of the  Company
authorizing  redemption  of the Rights,  the right to  exercise  the Rights will
terminate  and the only right of the  holders of Rights  will be to receive  the
Redemption Price. The Company will give notice of such redemption to the holders
of the then  outstanding  Rights by mailing  such notice to all such  holders at
their last addresses as they appear on the Registry Books of the Rights Agent.

                  Until a Right is exercised,  the holder thereof, as such, will
have no rights as a shareholder of the Company,  including,  without limitation,
the right to vote or to receive dividends.

                  Prior to the Rights becoming exercisable, the Rights Agreement
may be amended or supplemented by the Company and the Rights Agent in any manner
without  the  approval  of any  holders of Rights,  except for an  amendment  or
supplement which would change the Redemption Price, reduce the Purchase Price or
change  the  number of  Common  Shares  for  which a Right is then  exercisable;
provided,  however, that between April 15, 2001 and September 30, 2001 the Board
of  Directors  shall  review  the  other  provisions  of the  Rights  Agreement,
including  without  limitation  the Final  Expiration  Date,  to determine  what
amendments,  if any,  are  necessary or  appropriate  to  effectuate  better the
purposes of such Agreement.  After the  Distribution  Date, the Rights Agreement
may be so amended  or  supplemented  to cure  ambiguity,  correct or  supplement
defective or inconsistent  provisions or otherwise as the Company and the Rights
Agent  may deem  necessary  or  desirable  and shall not  adversely  affect  the
interests of the Rights holders.

                  A copy  of the  Rights  Agreement  is  being  filed  with  the
Securities and Exchange Commission as an Exhibit to a Registration  Statement on
Form 8-A. A copy of the Rights  Agreement is  available  free of charge from the
Company.  This summary description of the Rights does not purport to be complete
and is qualified in its entirety by reference to the Rights Agreement,  which is
hereby incorporated herein by reference.

                  As of the close of  business  on April 14,  1998,  there  were
10,542,307  Common  Shares  outstanding  and 668,900  Common  Shares held in the
treasury.  One Right will be distributed for each Common Share outstanding as of
the close of business on April 14,  1998.  As long as the Rights are attached to
the Common  Shares and in certain  other  circumstances  specified in the Rights
Agreement,  the Company  will issue one Right for each Common Share issued after
April 14, 1998.

                  The Rights may have certain anti-takeover  effects. The Rights
may cause substantial dilution to a person or group that attempts to acquire the
Company without prior approval of the Board of Directors.  The Rights should not
interfere with any merger or other business combination approved by the Board of
Directors of the Company.

                  The form of  Rights  Agreement  between  the  Company  and the
Rights Agent specifying the terms of the Rights, which includes as Exhibit A the
form  of  Rights  Certificate,   is  attached  hereto  as  Exhibit  4.1  and  is
incorporated herein by reference.  The foregoing  description of the Rights does
not purport to be complete and is qualified in its entirety by reference to such
Exhibit.

Item 2.  Exhibits.

Exhibit No.              Description
- -----------              -----------

   4.1                   Form of Rights  Agreement,  dated as of April 14, 1998,
                         between  Medco   Research,   Inc.  and  American  Stock
                         Transfer  &  Trust  Company,  as  Rights  Agent,  which
                         includes  as  Exhibit  A  thereto  the  Form  of  Right
                         Certificate.

                                    SIGNATURE

Pursuant to be  requirements  of Section 12 of the  Securities  Exchange  Act of
1934, the registrant has duly caused this registration statement to be signed on
its behalf by the undersigned, thereto duly authorized.

                                            MEDCO RESEARCH, INC.



Date:  April 15, 1998                       /s/ Glenn Andrews
                                            ------------------------------
                                            Name:  Glenn Andrews
                                            Title: Chief Financial Officer



<PAGE>


                                  EXHIBIT INDEX

Exhibit No.              Description
- -----------              -----------

   4.1                   Form of Rights  Agreement,  dated as of April 14, 1998,
                         between  Medco   Research,   Inc.  and  American  Stock
                         Transfer  &  Trust  Company,  as  Rights  Agent,  which
                         includes  as  Exhibit  A  thereto  the  Form  of  Right
                         Certificate.




                                                                     EXHIBIT 4.1

                                RIGHTS AGREEMENT

                  This  Rights  Agreement,  dated as of  April  14,  1998  (this
"Agreement"),  is between  MEDCO  RESEARCH,  INC., a Delaware  corporation  (the
"Company"), and AMERICAN STOCK TRANSFER & TRUST COMPANY (the "Rights Agent").

                                    RECITALS

                  WHEREAS,  the Board of Directors of the Company has determined
that  it is  desirable  and  in  the  best  interests  of the  Company  and  its
shareholders  for the Company to grant to each holder of shares of Common Stock,
without par value,  of the Company (the "Common  Shares") a right entitling such
holder to  purchase,  upon the terms and  subject  to the  conditions  set forth
herein, one-half of one Common Share for each Common Share so held at an initial
purchase  price of $92.00  per whole  Common  Share,  subject to  adjustment  as
provided herein; and

                  WHEREAS,  on April 2,  1998,  the  Board of  Directors  of the
Company  authorized and declared a dividend  distribution  of one right for each
Common Share outstanding at the close of business on April 14, 1998 (the "Record
Date"),  entitling the holder thereof to purchase, upon the terms and subject to
the  conditions  hereinafter  set forth,  one-half of one Common  Share for each
Common Share so held on the Record Date at an initial  purchase  price of $92.00
per Share,  subject to  adjustment  as  hereinafter  provided  (such  rights are
hereinafter  referred to as the  "Rights") and also  authorized  and granted one
Right  for each  Common  Share  issued  after the  Record  Date but prior to the
earlier of (i) the  Distribution  Date (in the case of Common Shares issued upon
conversion of the Company's convertible  securities or upon exercise of employee
stock options, prior to the thirtieth day after the Distribution Date), (ii) the
Expiration Date (as defined in Section 1(i) below), or (iii) April 15, 2008 (the
"Final Expiration Date"),  including,  without limitation,  Common Shares issued
upon  conversion of the Company's  convertible  securities  and upon exercise of
employee  stock  options and Common  Shares which are treasury  shares as of the
Record Date and subsequently become outstanding;

                  NOW,  THEREFORE,  in  consideration  of the  premises  and the
mutual agreements herein set forth, the parties hereby agree as follows:

                  Section  1.   CERTAIN   DEFINITIONS.   For  purposes  of  this
Agreement, the following terms have the meanings indicated:

                  (a)  "Acquiring  Person"  shall  mean any Person who or which,
together  with  all  Affiliates  and  Associates  of such  Person,  shall be the
Beneficial Owner of 20% or more of the Common Shares then outstanding, but shall
not include (i) the Company,  any  Subsidiary  or any employee  benefit or stock
ownership  plan of the Company or any Person or entity  organized,  appointed or
established by the Company for or pursuant to any such plan, (ii) any Person who
becomes an Acquiring  Person  solely as a result of a reduction in the number of
Common Shares  outstanding due to the repurchase of Common Shares by the Company
unless and until such time as (x) such Person or any  Affiliate  or Associate of
such Person  shall  thereafter  become the  Beneficial  Owner of any  additional
Common  Shares,  other  than as a result  of a stock  dividend,  stock  split or
similar  transaction  effected  by the  Company  in which all  holders of Common
Shares are treated equally,  or (y) any other Person who is the Beneficial Owner
of any Common Shares shall  thereafter  become an Affiliate or Associate of such
Person,  or (iii) any Person who becomes the Beneficial  Owner of 20% or more of
the Common Shares then  outstanding in a transaction  or series of  transactions
which are approved in advance by the affirmative vote of a majority of the Board
of  Directors  of the  Company and a majority of the  Continuing  Directors  (an
"Approved Transaction") unless and until such Person shall purchase or otherwise
become the  Beneficial  Owner of additional  Common  Shares in a transaction  or
series of transactions which are not approved in advance by the affirmative vote
of a majority  the Board of  Directors  of the  Company  and a  majority  of the
Continuing Directors.

                  (b)  "Affiliate"  and  "Associate"  shall have the  respective
meanings  ascribed  to such  terms  in  Rule  12b-2  of the  General  Rules  and
Regulations under the Securities Exchange Act of 1934, as amended (the "Exchange
Act"), as in effect on the date hereof.

                  (c) A Person  shall be deemed  the  "Beneficial  Owner" of and
shall be deemed to "beneficially own" any securities:

                           (i)  which  such  Person  or  any  of  such  Person's
                  Affiliates  or  Associates,  directly or  indirectly,  has the
                  right to vote or dispose of or has  "beneficial  ownership" of
                  (as determined pursuant to Rule 13d-3 of the General Rules and
                  Regulations under the Exchange Act), including pursuant to any
                  agreement,  arrangement  or  understanding,  whether or not in
                  writing;

                      (ii) which such Person or any of such Person's  Affiliates
                  or  Associates,  directly  or  indirectly,  has the  right  to
                  acquire (whether such right is exercisable immediately or only
                  after  the  passage  of  time)   pursuant  to  any  agreement,
                  arrangement  or   understanding,   or  upon  the  exercise  of
                  conversion rights,  exchange rights,  rights (other than these
                  Rights), warrants or options, or otherwise; provided, however,
                  that a Person shall not be deemed the Beneficial  Owner of, or
                  to  beneficially  own, (A) securities  tendered  pursuant to a
                  tender or  exchange  offer made by or on behalf of such Person
                  or any of such Person's  Affiliates  or Associates  until such
                  tendered  securities are accepted for purchase or payment,  or
                  (B)  securities  issuable  upon exercise of Rights at any time
                  prior  to  the  occurrence  of  a  Triggering  Event,  or  (C)
                  securities issuable upon exercise of Rights from and after the
                  occurrence of a Triggering Event which Rights were acquired by
                  such Person or any of such  Person's  Affiliates or Associates
                  prior to the Distribution  Date or pursuant to Section 3(a) or
                  Section  22 hereof or  pursuant  to  Section  11(i)  hereof in
                  connection  with an adjustment made with respect to any Rights
                  which  such  Person  or any of  such  Person's  Affiliates  or
                  Associates has the right to vote or dispose of pursuant to any
                  agreement, arrangement or understanding; or

                     (iii) which are beneficially owned, directly or indirectly,
                  by any other  Person  with  which  such  Person or any of such
                  Person's   Affiliates   or  Associates   has  any   agreement,
                  arrangement  or  understanding  for the purpose of  acquiring,
                  holding, voting or disposing of any securities of the Company;
                  provided,  however,  that a Person  shall  not be  deemed  the
                  Beneficial  Owner of, or to beneficially  own, any security if
                  such Person has the right to vote such security pursuant to an
                  agreement,  arrangement  or  understanding  which  (A)  arises
                  solely from a revocable proxy given to such Person in response
                  to a public proxy or consent  solicitation  made  pursuant to,
                  and in accordance  with, the applicable  rules and regulations
                  of the  Exchange  Act and (B) is not also then  reportable  on
                  Schedule  13D under the  Exchange  Act (or any  comparable  or
                  successor report);

provided,  however,  that  nothing in this  paragraph  (c) shall  cause a Person
engaged in business as an underwriter of securities to be deemed the "Beneficial
Owner" of, or to  "beneficially  own",  any  securities  acquired  through  such
Person's participation in good faith in a firm commitment underwriting until the
expiration of forty (40) days after the date of such acquisition.

                  (d)  "Business  Day" shall mean any day other than a Saturday,
Sunday,  or a day on which  banking  institutions  in the  State of New York are
closed or are authorized or obligated by law or executive order to close.

                  (e)  "Close of  business"  on any given  date  shall mean 5:00
P.M., New York City time, on such date; provided,  however, that if such date is
not a  Business  Day it shall mean 5:00  P.M.,  New York City time,  on the next
succeeding Business Day.

                  (f) "Common  Shares"  when used with  reference to the Company
shall mean the Common Shares, without par value, of the Company or the shares of
the Company's  Preferred  Stock issued  pursuant to Section  11(a)(iii)  hereof;
provided  that, if the Company is the  continuing or surviving  corporation in a
transaction  described in Section  11(d)(ii)  hereof,  "Common Shares" when used
with  reference  to the Company  shall mean the capital  stock with the greatest
aggregate  voting  power of the Company or, if the  Company is a  subsidiary  of
another  corporation or business  trust the  corporation or business trust which
ultimately controls the Company. "Common Shares" when used with reference to any
corporation or business  trust,  other than the Company,  shall mean the capital
stock with the greatest  aggregate  voting power of such corporation or business
trust or, if such  corporation  or  business  trust is a  subsidiary  of another
corporation  or  business  trust,   the  corporation  or  business  trust  which
ultimately controls such first-mentioned corporation or business trust.

                  (g)  "Continuing  Director"  shall  mean (i) any member of the
Board of  Directors  of the  Company  who,  while such Person is a member of the
Board,  is not an  Acquiring  Person,  an Affiliate or Associate of an Acquiring
Person or a  representative  of an Acquiring  Person or of any such Affiliate or
Associate, and was a member of the Board prior to the date of this Agreement, or
(ii) any  Person  who  becomes  a member  of the  Board  after  the date of this
Agreement who,  while such Person is a member of the Board,  is not an Acquiring
Person,  an Affiliate or Associate of an Acquiring Person or a representative of
an Acquiring  Person or of any such  Affiliate or  Associate,  if such  Person's
nomination for election or election to the Board is recommended or approved by a
majority of the then Continuing Directors.

                  (h)  "Distribution  Date" shall have the  meaning  ascribed to
such term in Section 3 hereof.

                  (i)  "Expiration  Date" shall mean the earlier of (i) the date
on which the Rights are  redeemed  as  provided in Section 23 hereof or (ii) the
time at which all exercisable  Rights are exchanged as provided in Section 11(p)
hereof.

                  (j) "Flip-In  Event" shall mean any event described in Section
11(a)(ii) hereof.

                  (k)  "Flip-Over  Event"  shall  mean any  event  described  in
clauses (i), (ii) or (iii) of Section 11(d) hereof.

                  (l) "Person" shall mean any individual,  firm,  corporation or
other  entity,  and shall include any successor (by merger or otherwise) of such
entity.

                  (m)   "Redemption   Price"   shall   mean   $.01  per   Right,
appropriately  adjusted to reflect any stock  split,  stock  dividend or similar
transaction occurring after the date hereof.

                  (n)  "Share  Acquisition  Date"  shall  mean the first date of
public  announcement  by the Company or an Acquiring  Person (by press  release,
filing made with the  Securities and Exchange  Commission or otherwise)  that an
Acquiring Person has become such.

                  (o) "Subsidiary" shall mean any corporation or other entity of
which a majority of the voting power of the voting  equity  securities or equity
interests is owned, directly or indirectly, by the Company.

                  (p)  "Triggering  Event"  shall  mean  any  Flip-In  Event  or
Flip-Over Event.

                  Section 2.  APPOINTMENT  OF RIGHTS AGENT.  The Company  hereby
appoints the Rights Agent to act as agent for the Company and the holders of the
Rights (who,  in accordance  with Section 3 hereof,  shall also be, prior to the
Distribution  Date,  the holders of the Common  Shares) in  accordance  with the
terms  and  conditions   hereof,  and  the  Rights  Agent  hereby  accepts  such
appointment and hereby  certifies that it complies with the  requirements of the
New York Stock Exchange  governing  transfer agents and registrars.  The Company
may from time to time appoint such Co-Rights  Agents as it may deem necessary or
desirable.  Any actions  which may be taken by the Rights Agent  pursuant to the
terms of this Agreement may be taken by any such Co-Rights Agent.

                  Section 3. ISSUE OF RIGHT CERTIFICATES.  (a) Until the earlier
of (i) the  close  of  business  on the  tenth  Business  Day  after  the  Share
Acquisition Date (or such later date as the Board of Directors shall determine),
or (ii) the close of business on the tenth  Business  Day (or such later date as
the Board of Directors shall determine) after the date that a tender or exchange
offer by any Person (other than the Company,  any Subsidiary of the Company, any
employee benefit plan of the Company or of any Subsidiary of the Company, or any
Person or entity  organized,  appointed  or  established  by the  Company for or
pursuant  to the  terms of any such  plan) is first  published  or sent or given
within the meaning of Rule 14d-2(a) of the General Rules and  Regulations  under
the  Exchange  Act,  if upon  consummation  thereof  such  Person  would  be the
Beneficial  Owner of 20% or more of the  Common  Shares  then  outstanding  (the
earlier of (i) and (ii) being herein  referred to as the  "Distribution  Date"),
the Rights will be evidenced (subject to the provisions of paragraph (b) of this
Section 3) by the certificates for Common Shares  registered in the names of the
record  holders  thereof  (which  certificates  for Common  Shares shall also be
deemed to be Right Certificates) and not by separate Right Certificates, and the
right to receive Right Certificates will be transferable only in connection with
the  transfer  of  Common  Shares  in the stock  transfer  books of the  Company
maintained  by  the  Company  or  its  appointed  transfer  agent.  As  soon  as
practicable  after the  Distribution  Date,  the  Rights  Agent  will  send,  by
first-class,  insured, postage prepaid mail (or such other method as the Company
shall deem appropriate),  to each record holder of Common Shares as of the close
of business on the Distribution Date, at the address of such holder shown on the
records  of the  Company,  a Right  Certificate,  in  substantially  the form of
Exhibit A hereto, evidencing one Right for each Common Share so held, subject to
adjustment,  together with a notice setting forth the Purchase Price (as defined
in  Section  4  hereof)  as in  effect  on  the  Distribution  Date.  As of  the
Distribution   Date,  the  Rights  will  be  evidenced   solely  by  such  Right
Certificates.

                  Any Right  Certificate  issued pursuant to this Section 3 that
represents  Rights which are  beneficially  owned by an Acquiring  Person or any
Associate or Affiliate thereof and any Right Certificate issued at any time upon
the transfer of any Rights to an Acquiring  Person or any Associate or Affiliate
thereof or to any nominee of such Acquiring Person,  Associate or Affiliate, and
any Right Certificate  issued pursuant to Sections 6 or 11 hereof upon transfer,
exchange,  replacement or adjustment of any other Right Certificate  referred to
in this sentence,  shall be subject to and (to the extent feasible)  contain the
following  legend or such similar legend as the Company may deem appropriate and
as is not  inconsistent  with the  provisions  of this  Agreement,  or as may be
required to comply with any applicable  law or with any rule or regulation  made
pursuant  thereto or with any rule or regulation of any stock  exchange on which
the Rights may from time to time be listed, or to conform to usage:

               The Rights represented by this Right Certificate were
               issued  to  or  acquired  by  a  Person  who  was  an
               Acquiring  Person or an  Affiliate or an Associate of
               an Acquiring Person (as such terms are defined in the
               Rights  Agreement).  This Right  Certificate  and the
               Rights represented hereby may become null and void in
               the circumstances specified in the Rights Agreement.

provided,  however, the failure of the Company to cause any Right Certificate to
contain  such  legend or any defect  therein,  shall not affect the  legality or
validity of any provision of this Agreement, including provisions voiding Rights
held by any such Person.

                  (b) On the Record  Date or as soon as  reasonably  practicable
thereafter,  the  Company  will send a copy of a Summary  of Rights to  Purchase
Common  Shares,  in  substantially  the form  attached  hereto as Exhibit B (the
"Summary of Rights"), by first-class, postage prepaid mail (or such other method
as the Company shall deem  appropriate),  to each record holder of Common Shares
as of the close of  business on the Record  Date,  at the address of such holder
shown  on  the  records  of  the  Company  as of  such  date.  With  respect  to
certificates  for Common  Shares  outstanding  as of the Record Date,  until the
Distribution  Date the Rights will be evidenced by such  certificates for Common
Shares  registered in the names of the holders  thereof.  Until the Distribution
Date (or the earlier of the Expiration Date or the Final  Expiration  Date), the
surrender for transfer of any certificate  for Common Shares  outstanding on the
Record Date, with or without a copy of the Summary of Rights  attached  thereto,
shall also  constitute  the  transfer of the Rights  associated  with the Common
Shares represented thereby.

                  (c) Certificates for Common Shares issued (including,  without
limitation,  any  certificates  for Common Shares issued upon  conversion of the
Company's convertible  securities or upon exercise of employee stock options) or
surrendered  for  transfer  or  exchange  after the Record Date but prior to the
earlier of the  Distribution  Date, the Expiration Date or the Final  Expiration
Date,  shall have stamped on,  impressed on, printed on, written on or otherwise
affixed to them the following  legend or such similar  legend as the Company may
deem  appropriate  and  as is not  inconsistent  with  the  provisions  of  this
Agreement,  or as may be required to comply with any  applicable law or with any
rule or regulation  made pursuant  thereto or with any rule or regulation of any
stock exchange on which the Common Shares or the Rights may from time to time be
listed, or to conform to usage:

               This  Certificate  also  evidences  and  entitles the
               holder  hereof  to  certain  Rights as set forth in a
               Rights  Agreement  between Medco  Research,  Inc. and
               American Stock Transfer & Trust Company,  dated as of
               April 14, 1998 (the  "Rights  Agreement"),  the terms
               of which are hereby  incorporated herein by reference
               and a copy  of  which  is on  file  at the  principal
               executive  offices  of  Medco  Research,  Inc.  Under
               certain  circumstances,  as set  forth in the  Rights
               Agreement,  such Rights will be evidenced by separate
               certificates  and will no longer be evidenced by this
               Certificate.  Medco  Research,  Inc. will mail to the
               holder  of  this  Certificate  a copy  of the  Rights
               Agreement  without  charge  within five business days
               after receipt of a written  request  therefor.  Under
               certain  circumstances,  Rights beneficially owned by
               an  Acquiring  Person or any  Affiliate  or Associate
               thereof  (as such  terms are  defined  in the  Rights
               Agreement) and any  subsequent  holder of such Rights
               may become null and void.

                  With respect to certificates  containing the legend  described
above,  until the Distribution Date the Rights associated with the Common Shares
represented by such certificates shall be evidenced by such certificates  alone,
and the surrender for transfer of any such certificate shall also constitute the
surrender  for  transfer  of  the  Rights  associated  with  the  Common  Shares
represented thereby.

                  Section 4. FORM OF RIGHT CERTIFICATES.  The Right Certificates
(and the forms of election to purchase shares and of assignment to be printed on
the reverse  thereof) shall be  substantially  the same as Exhibit A hereto with
such changes, marks of identification or designation and such legends, summaries
or endorsements  printed thereon as the Company may deem  appropriate and as are
not inconsistent with the provisions of this Agreement, or as may be required to
comply with any  applicable  law or with any rule or  regulation  made  pursuant
thereto or with any rule or regulation of any stock exchange on which the Rights
may  from  time to time be  listed,  or to  conform  to  usage.  Subject  to the
provisions of Sections 11 and 22 hereof, the Right Certificates, whenever issued
and on their face,  shall entitle the holders thereof to purchase such number of
Common  Shares as shall be set forth  therein  at the price per whole  share set
forth  therein  (the  "Purchase  Price"),  but the number of such shares and the
Purchase Price shall be subject to adjustment as provided herein.

                  Section  5.  COUNTERSIGNATURE  AND  REGISTRATION.   The  Right
Certificates  shall be executed on behalf of the Company by its  Chairman of the
Board,  President or Chief  Financial  Officer,  either manually or by facsimile
signature,  and shall have  affixed  thereto the  Company's  seal or a facsimile
thereof  which shall be attested by the  Secretary or an Assistant  Secretary of
the Company,  either manually or by facsimile signature.  The Right Certificates
shall be manually  countersigned  by the Rights Agent and shall not be valid for
any  purpose  unless so  countersigned.  In case any  officer of the Company who
shall have signed any of the Right  Certificates  shall cease to be such officer
of the Company  before  countersignature  by the Rights  Agent and  issuance and
delivery  by  the  Company,   such  Right   Certificates   nevertheless  may  be
countersigned  by the Rights Agent and issued and  delivered by the Company with
the  same  force  and  effect  as  though  the  person  who  signed  such  Right
Certificates  had not ceased to be such  officer of the  Company;  and any Right
Certificate  may be signed on behalf of the  Company by any person  who,  at the
actual  date of the  execution  of such  Right  Certificate,  shall  be a proper
officer of the Company to sign such Right  Certificate,  although at the date of
the execution of this Rights Agreement any such person was not such an officer.

         Following the Distribution Date, the Rights Agent will keep or cause to
be kept, at one of its offices in New York, New York, books for registration and
transfer of the Right Certificates  issued hereunder.  Such books shall show the
names and addresses of the  respective  holders of the Right  Certificates,  the
number of Rights evidenced on its face by each of the Right Certificates and the
date of each of the Right Certificates.

                  Section 6.  TRANSFER,  SPLIT UP,  COMBINATION  AND EXCHANGE OF
RIGHT  CERTIFICATES;  MUTILATED,  DESTROYED,  LOST OR STOLEN RIGHT CERTIFICATES.
Subject to the  provisions of Section 14 hereof,  at any time after the close of
business on the  Distribution  Date, and at or prior to the close of business on
the  earlier of the  Expiration  Date or the Final  Expiration  Date,  any Right
Certificate or Certificates may be transferred,  split up, combined or exchanged
for another Rights Certificate or Rights Certificates,  entitling the registered
holder to purchase a like number of Common Shares as the Rights  Certificate  or
Right  Certificates  surrendered  then  entitled  such holder to  purchase.  Any
registered holder desiring to transfer,  split up, combine or exchange any Right
Certificate  shall make such request in writing  delivered to the Rights  Agent,
and  shall  surrender  the  Rights  Certificate  or  Rights  Certificates  to be
transferred,  split up,  combined or  exchanged at the  principal  office of the
Rights  Agent in New York,  New York,  and  thereupon  the  Rights  Agent  shall
countersign  and deliver to the person entitled  thereto a Right  Certificate or
Right Certificates, as the case may be, as so requested. The Company may require
payment of a sum sufficient to cover any tax or governmental  charge that may be
imposed in connection  with any transfer,  split up,  combination or exchange of
Right Certificates.

                  Upon  receipt by the Company and the Rights  Agent of evidence
reasonably satisfactory to them of the loss, theft, destruction or mutilation of
a Right Certificate, and, in case of loss, theft or destruction, of indemnity or
security  reasonably  satisfactory to them, and reimbursement to the Company and
the  Rights  Agent  of all  reasonable  expenses  incidental  thereto,  and upon
surrender  to the Rights  Agent and  cancellation  of the Right  Certificate  if
mutilated,  the Company  will make and deliver a new Right  Certificate  of like
tenor to the Rights  Agent for delivery to the  registered  owner in lieu of the
Right Certificate so lost, stolen, destroyed or mutilated.

                  Section 7. EXERCISE OF RIGHTS; PURCHASE PRICE; EXPIRATION DATE
OF RIGHTS.

                  (a)  The  registered  holder  of  any  Right  Certificate  may
exercise the Rights evidenced  thereby (except as otherwise  provided herein) in
whole or in part at any time after the Distribution  Date and at or prior to the
Close of business on the earlier of the Expiration Date or the Final  Expiration
Date upon  surrender  of the Right  Certificate,  with the form of  election  to
purchase on the reverse side thereof  duly  executed,  to the Rights Agent at an
office of the Rights Agent designated for such purpose,  together with an amount
in cash, in lawful money of the United States of America,  by certified check or
bank draft payable to the order of the Company,  equal to the Purchase Price for
each  Common  Share as to which such  surrendered  Rights are  exercised  or, if
applicable,  the exercise  price per Right  specified  in Sections  11(a)(ii) or
11(d)  hereof,  as the  case  may be,  together  with  an  amount  equal  to any
applicable  transfer  tax  required  to be paid  by the  holder  of  such  Right
Certificate in accordance with Section 9 hereof;  provided,  however, that after
the later of the first  occurrence  of a Triggering  Event and the  Distribution
Date,  in lieu of the cash  payment  payable to the Company  referred to in this
sentence,  the registered holder of a Right Certificate  evidencing  exercisable
Rights (which shall not include Rights that have become void pursuant to Section
11(a)(ii)  hereof)  may,  at the  option of the  Company,  exercise  the  Rights
evidenced  thereby in whole or in part in accordance with this Section 7(a) upon
surrender  of the  Right  Certificate  as  described  above,  together  with the
election to exercise such Rights duly  completed.  With respect to any Rights as
to which such an  election  to  exercise  without  payment of cash is made,  the
holder  shall  receive,  upon  exercise,  a number  of  Common  Shares  or other
securities,  as the case  may be,  having  a  current  per  share  market  price
(determined  pursuant  to  Section  11(e)  hereof  as of the  date of the  first
occurrence  of any  Triggering  Event) equal to the excess of (i) the  aggregate
current  per  share  market  price of the  Common  Shares  or  other  securities
(determined  pursuant  to  Section  11(e)  hereof  as of the  date of the  first
occurrence of any  Triggering  Event) that would have been issuable upon payment
of the cash  amount as  described  above over (ii) the amount of cash that would
have been payable to the Company upon exercise absent such election.

                  (b) The  Purchase  Price shall  initially be $92.00 per Common
Share purchased, (equivalent to $46.00 for each one-half of a Common Share), and
shall be  subject  to  adjustment  from time to time as  provided  in Section 11
hereof.

                  (c) Subject to Sections  7(d),  11(a)(ii),  and 11(d)  hereof,
upon receipt of a Right  Certificate  representing  exercisable  Rights with the
form of election to purchase duly  executed,  accompanied  by either  payment as
described  above or a duly  completed  election to exercise  without  payment of
cash, the Rights Agent shall promptly (i) requisition from any transfer agent of
the Common Shares (or make available, if the Rights Agent is the transfer agent)
certificates representing the number of whole Common Shares to be purchased, and
the Company hereby irrevocably  authorizes its transfer agent to comply with all
such  requests,  (ii) after  receipt of such  certificates  cause the same to be
delivered  to or  upon  the  order  of  the  registered  holder  of  such  Right
Certificate,  registered  in such  name or  names as may be  designated  by such
holder, (iii) if appropriate, requisition from the Company the amount of cash to
be paid  or  depository  receipts  to be  issued  in  lieu  of the  issuance  of
fractional  shares  in  accordance  with  Section  14  hereof  or in lieu of the
issuance of Common Shares in accordance with Section 11(a)(iii) or 11(d) hereof,
and (iv) if  appropriate,  after  receipt,  deliver  such  cash  (or  depository
receipts,  when  appropriate)  to or upon the order of the registered  holder of
such Right Certificate.

                  (d) In case the  registered  holder of any  Right  Certificate
shall  exercise  less  than  all  the  Rights  evidenced  thereby,  a new  Right
Certificate  evidencing  Rights  equivalent to the Rights remaining  unexercised
shall be issued  by the  Rights  Agent to the  registered  holder of such  Right
Certificate  or to his duly  authorized  assigns,  subject to the  provisions of
Section 14 hereof.

                  (e)   Notwithstanding   anything  in  this  Agreement  to  the
contrary,  neither  the  Rights  Agent nor the  Company  shall be  obligated  to
undertake  any  action  with  respect  to  any  purported  transfer,  split  up,
combination or exchange of any Right Certificate pursuant to Section 6 hereof or
exercise  of a Right  Certificate  as set  forth in this  Section  7 unless  the
registered  holder of such  Certificate  shall have (i) completed and signed the
certificate  following  the  form  of  assignment  or the  form of  election  to
purchase, as applicable,  set forth on the reverse side of the Right Certificate
surrendered for such transfer,  split up, combination,  exchange or exercise and
(ii) provided such additional  evidence of the identity of the Beneficial  Owner
(or former Beneficial Owner) or Affiliates or Associates  thereof as the Company
shall have reasonably requested.

                  Section 8. CANCELLATION AND DESTRUCTION OF RIGHT CERTIFICATES.
All Right Certificates surrendered for the purpose of exercise,  transfer, split
up,  combination or exchange  shall,  if surrendered to the Company or to any of
its stock transfer agents,  be delivered to the Rights Agent for cancellation or
in canceled form or, if  surrendered  to the Rights Agent,  shall be canceled by
it,  and no Right  Certificates  shall  be  issued  in lieu  thereof  except  as
expressly  permitted by any of the  provisions  of this  Agreement.  The Company
shall  deliver to the Rights  Agent for  cancellation  and  retirement,  and the
Rights Agent shall so cancel and retire,  any other Right Certificate  purchased
or acquired by the Company otherwise than upon the exercise thereof.  The Rights
Agent shall deliver all canceled Right Certificates to the Company, or shall, at
the written  request of the Company,  destroy such canceled Right  Certificates,
and in such case  shall  deliver a  certificate  of  destruction  thereof to the
Company.

                  Section 9. RESERVATION AND AVAILABILITY OF COMMON SHARES.  The
Company  covenants  and  agrees  that it will  cause  to be  reserved  and  kept
available out of its  authorized and unissued  Common Shares,  or any authorized
and issued Common Shares held in its treasury,  the number of Common Shares that
will be  sufficient  to permit the exercise  pursuant to Section 7 hereof of all
outstanding  Rights;  such number of Common Shares  reserved and kept  available
shall be adjusted  from time to time,  if and to the extent  required,  upon the
occurrence of any of the events described in Section 11 hereof.

                  So  long  as the  Company's  Common  Shares  are  listed  on a
national  securities  exchange,  the Company shall  endeavor to cause,  from and
after such time as the Rights become exercisable, all Common Shares reserved for
issuance upon exercise of the Rights to be listed on such exchange upon official
notice of issuance.

                  The  Company  covenants  and agrees that it will take all such
action as may be  necessary  to ensure  that all Common  Shares  delivered  upon
exercise of Rights  shall be, at the time of delivery  of the  certificates  for
such shares (subject to payment of the Purchase  Price,  if required),  duly and
validly  authorized and issued,  fully paid,  nonassessable and freely tradeable
shares of Common  Stock,  free and clear of any  liens,  encumbrances  and other
adverse claims and not subject to any rights of call or first refusal.

                  The Company further covenants and agrees that it will pay when
due and payable any and all federal and state  transfer  taxes and charges which
may be payable in respect of the issuance or delivery of the Right  Certificates
or of any Common  Shares  upon the  exercise of Rights.  The Company  shall not,
however,  be required to pay any transfer tax which may be payable in respect of
any transfer or delivery of Right  Certificates  to a person other than,  or the
issuance or delivery of certificates  for the Common Shares in a name other than
that of,  the  registered  holder of the  Right  Certificate  evidencing  Rights
surrendered  for exercise,  or to issue or deliver any  certificates  for Common
Shares upon the  exercise of any Rights  until any such tax shall have been paid
(any such tax being payable by the holder of such Right  Certificate at the time
of surrender)  or until it has been  established  to the Company's  satisfaction
that no such tax is due.

                  The  Company  further  consents  and  agrees  to use its  best
efforts to (i) file on an appropriate form, as soon as practicable following the
later to occur of a Triggering  Event or the  Distribution  Date, a registration
statement under the Securities Act of 1933, as amended (the  "Securities  Act"),
with respect to the securities  issuable upon exercise of the Rights, (ii) cause
such  registration  statement to become  effective as soon as practicable  after
such filing,  and (iii) cause such  registration  statement to remain  effective
(with a prospectus at all times meeting the  requirements of the Securities Act)
until  the  earliest  of (A) the  date as of  which  the  Rights  are no  longer
exercisable  for such  securities,  (B) the  Expiration  Date, and (C) the Final
Expiration  Date.  The Company will also take such action as may be  appropriate
under,  or to ensure  compliance  with, the securities or "blue sky" laws of the
various states in connection with the  exercisability of the Rights. The Company
may temporarily suspend the exercisability of the Rights in order to prepare and
file such registration statement and permit it to become effective, and upon any
such  suspension the Company will issue a public  announcement  stating that the
exercisability  of the  Rights  has been  temporarily  suspended,  as well as an
appropriate  public  announcement at such time as the suspension is no longer in
effect.  Notwithstanding  anything in this Agreement to the contrary, the Rights
shall not be exercisable in any  jurisdiction  if the requisite  registration or
qualification in such jurisdiction  shall not have been effected or the exercise
of the Rights shall not be permitted under applicable law.
                  Notwithstanding  anything in this  Agreement to the  contrary,
the Company covenants and agrees that, after the Distribution Date, it will not,
except as  permitted  by Section 23 or Section 26 hereof,  take any action if at
the time such action is taken it is reasonably foreseeable that such action will
diminish or  otherwise  eliminate  the  benefits  intended to be afforded by the
Rights.

                  In the event that the Company is  obligated to pay cash and/or
distribute  other property  pursuant to Sections 11, 13, and 14 hereof,  it will
make all arrangements  necessary so that such cash and/or property are available
for distribution by the Rights Agent, if and when appropriate.

                  Section 10. COMMON  SHARES  RECORD DATE.  Each person in whose
name any  certificate  for Common  Shares is issued upon the  exercise of Rights
shall for all  purposes  be deemed to have  become  the  holder of record of the
Common Shares  represented  thereby on, and such certificate shall be dated, the
date  upon  which  the  Right  Certificate   evidencing  such  Rights  was  duly
surrendered  and payment of the Purchase  Price, if required (and any applicable
transfer taxes), was made; provided, however, that if the date of such surrender
and payment is a date upon which the Common Shares transfer books of the Company
are closed, such person shall be deemed to have become the record holder of such
shares on, and such certificate shall be dated, the next succeeding Business Day
on which the Common Shares transfer books of the Company are open.  Prior to the
exercise  pursuant  to Section 7 hereof of the  Rights  evidenced  thereby,  the
holder  of a  Right  Certificate  shall  not  be  entitled  to any  rights  of a
shareholder  of the Company with respect to shares for which the Rights shall be
exercisable,  including,  without  limitation,  the  right to vote,  to  receive
dividends or other distributions or to exercise any preemptive rights, and shall
not be entitled to receive any notice of any proceedings of the Company,  except
as provided herein.

                  Section 11.  ADJUSTMENT OF PURCHASE PRICE,  NUMBER AND TYPE OF
SHARES OR NUMBER OF RIGHTS.  The Purchase  Price,  the number and type of shares
covered  by each  Right and the  number of Rights  outstanding  are  subject  to
adjustment from time to time as provided in this Section 11.

                  (a) (i) In the event that the Company  shall at any time after
the date of this  Agreement (A) declare a dividend on the Common Shares  payable
in Common Shares,  (B) subdivide the outstanding  Common Shares, (C) combine the
outstanding  Common  Shares  into a  smaller  number  of shares or (D) issue any
shares  of  its  capital  stock  in a  reclassification  of  the  Common  Shares
(including  any such  reclassification  in connection  with a  consolidation  or
merger in which the Company is the continuing or surviving corporation),  except
as otherwise  provided in this Section  11(a) or in Section  11(d)  hereof,  the
Purchase  Price in effect at the time of the record date for such dividend or of
the effective date of such subdivision, combination or reclassification,  and/or
the number and/or kind of shares of capital stock  issuable on such date,  shall
be proportionately adjusted so that the holder of any Right exercised after such
time shall be  entitled to receive  the  aggregate  number and kind of shares of
capital stock which, if such Right had been exercised  immediately prior to such
date and at a time when the Common  Shares  transfer  books of the Company  were
open,  he would have owned upon such  exercise  and been  entitled to receive by
virtue of such dividend, subdivision, combination or reclassification; provided,
however, that if the record date for any such dividend, subdivision, combination
or  reclassification  shall occur prior to the  Distribution  Date,  the Company
shall make an appropriate  adjustment to the Purchase Price (taking into account
any  additional  Rights  which  may be  issued  as a  result  of such  dividend,
subdivision,  combination  or  reclassification),   in  lieu  of  adjusting  (as
described above) the number of Common Shares (or capital shares, as the case may
be) issuable upon exercise of the Rights. If an event occurs which would require
an adjustment under both this Section  11(a)(i) and Section  11(a)(ii) hereof or
Section 11(d) hereof, the adjustment provided for in this Section 11(a)(i) shall
be in addition to, and shall be made prior to, any adjustment  required pursuant
to Section 11(a)(ii) or Section 11(d) hereof.

                           (ii) In the event  that any  Person  (other  than the
Company, any Subsidiary of the Company, any employee benefit plan of the Company
or of any  Subsidiary  of  the  Company,  or any  Person  or  entity  organized,
appointed or established by the Company for or pursuant to the terms of any such
plan) who or which,  together with all Affiliates and Associates of such Person,
shall  become  the  Beneficial  Owner of 20% or more of the Common  Shares  then
outstanding  (other than in an  Approved  Transaction),  then,  and in each such
case, the Company shall make adjustments in the terms of the Rights so that each
holder of a Right,  except as provided below,  shall  thereafter have a right to
receive,  upon exercise  thereof in accordance with the terms of this Agreement,
at an  exercise  price  per  Right  equal  to  the  product  of  two  times  the
then-current  Purchase Price multiplied by the number of Common Shares for which
a  Right  was  exercisable  immediately  prior  to  the  first  occurrence  of a
Triggering  Event,  such  number of  Common  Shares  as shall  equal the  result
obtained by (x) multiplying the product of two times the  then-current  Purchase
Price  by the  number  of  Common  Shares  for  which  a Right  was  exercisable
immediately  prior to the first  occurrence  of a Triggering  Event and dividing
that  product by (y) 50% of the  current  per share  market  price of the Common
Shares  (determined  pursuant to Section  11(e) hereof) on the date of the first
occurrence of a Triggering Event.  Notwithstanding anything in this Agreement to
the contrary,  from and after the later of the  Distribution  Date and the first
occurrence  of a  Flip-In  Event,  any  Rights  that  are or  were  acquired  or
beneficially owned (1) by any Acquiring Person (or any Affiliate or Associate of
such Acquiring  Person or any transferee  thereof) or (2) pursuant to a transfer
which the Board of  Directors of the Company has  determined  is part of a plan,
arrangement  or  understanding  which has as a  primary  purpose  or effect  the
avoidance  of this  sentence,  shall  become  null and void  without any further
action,  and no holder of such  Rights  shall  have any rights  whatsoever  with
respect  to such  Rights,  whether  under any  provision  of this  Agreement  or
otherwise.  The  Company  shall use all  reasonable  efforts to insure  that the
provisions  of the  preceding  sentence  are  complied  with,  but shall have no
liability  to any holder of Rights  Certificates  or other Person as a result of
its failure to make any  determinations  with respect to an Acquiring  Person or
its Affiliates, Associates or transferees hereunder.

                           (iii)  Upon the  occurrence  of a Flip-In  Event,  if
there  shall  not  be  sufficient  authorized  but  unissued  Common  Shares  or
authorized  and issued  Common Shares held in treasury to permit the exercise in
full of the  Rights  in  accordance  with the  foregoing  subsection  (ii),  the
Directors of the Company shall use their best efforts promptly to authorize and,
subject to the  provisions  of Section 9 hereof,  make  available  for  issuance
additional  Common  Shares;  provided,  however,  that if, at any time  after 90
calendar days after the first occurrence of a Flip-In Event,  there shall not be
sufficient  Common  Shares  available for issuance upon the exercise of a Right,
then, at the option of the Company's Board of Directors in its sole  discretion,
the Company  shall  either (1) issue shares of a series of its  Preferred  Stock
having voting, dividend and liquidation rights equivalent to those of the Common
Shares or (2) deliver,  upon the  surrender of such Right and without  requiring
payment of the Purchase Price,  Common Shares (to the extent available) and then
cash or other property or securities (to the extent  permitted by applicable law
and any  agreements  or  instruments  to which the  Company is a party in effect
immediately  prior to the first  occurrence of any Flip-In Event),  which Common
Shares  and cash shall have an  aggregate  value  equal to the excess of (x) the
aggregate current per share market price  (determined  pursuant to Section 11(e)
hereof) of all the Common Shares  issuable in accordance with subsection (ii) of
this  Section  11(a) upon the  exercise  of a Right over (y) the  product of the
then-current  Purchase Price multiplied by the number of Common Shares for which
a  Right  was  exercisable  immediately  prior  to  the  first  occurrence  of a
Triggering  Event.  To the  extent  that any legal or  contractual  restrictions
prevent the Company  from paying the full amount of cash  payable in  accordance
with the foregoing  sentence,  the Company shall pay to holders of the Rights as
to which such  payments are being made,  on a pro rata basis,  all amounts which
are not then  restricted.  The Company shall  continue to make payments on a pro
rata basis as funds become available until such payments have been paid in full.

                  (b) In the event that the Company  shall fix a record date for
the  issuance of rights,  options or  warrants  to all holders of Common  Shares
entitling them (for a period  expiring within 45 calendar days after such record
date) to  subscribe  for or purchase  Common  Shares (or shares  having the same
rights,  privileges  and  preferences as the Common Shares  ("equivalent  common
shares")) or securities  convertible  into Common  Shares or  equivalent  common
shares at a price per  Common  Share or  equivalent  common  share (or  having a
conversion  price per share,  if a security  convertible  into Common  Shares or
equivalent  common  shares)  less than the current per share market price of the
Common  Shares (as  determined  pursuant to Section 11(e) hereof) on such record
date,  the  Purchase  Price to be in effect  after  such  record  date  shall be
determined by multiplying the Purchase Price in effect immediately prior to such
record date by a fraction,  the numerator of which shall be the number of Common
Shares  outstanding  on such record date plus the number of Common  Shares which
the  aggregate  offering  price of the  total  number of  Common  Shares  and/or
equivalent  common  shares  so to  be  offered  (and/or  the  aggregate  initial
conversion price of the convertible  securities so to be offered) would purchase
at such current market price,  and the  denominator of which shall be the number
of Common Shares  outstanding  on such record date plus the number of additional
Common Shares and/or  equivalent common shares to be offered for subscription or
purchase  (or  into  which  the  convertible  securities  so to be  offered  are
initially  convertible).  In  case  such  subscription  price  may  be  paid  by
consideration part or all of which shall be in a form other than cash, the value
of such  consideration  shall be as determined in good faith by the Directors of
the Company,  whose  determination  shall be described in a statement filed with
the Rights Agent and shall be conclusive  for all purposes.  Common Shares owned
by or held for the account of the Company  shall not be deemed  outstanding  for
the purpose of any such computation.  Such adjustment shall be made successively
whenever such a record date is fixed; and in the event that such rights, options
or warrants are not so issued,  the Purchase Price shall again be adjusted to be
the  Purchase  Price  which  would then be in effect if such record date had not
been fixed.

                  (c) In the event that the Company  shall fix a record date for
the making of a distribution to all holders of Common Shares (including any such
distribution  made in  connection  with a  consolidation  or merger in which the
Company  is  the   continuing   or  surviving   corporation)   of  evidences  of
indebtedness, cash (other than a regular periodic cash dividend at a rate not in
excess of 125% of the rate of the last cash dividend  theretofore paid), assets,
stock (other than a dividend  payable in Common Shares) or subscription  rights,
options or warrants  (excluding those referred to in Section 11(b) hereof),  the
Purchase  Price to be in effect  after such record date shall be  determined  by
multiplying the Purchase Price in effect  immediately  prior to such record date
by a fraction,  the  numerator  of which  shall be the current per share  market
price of the Common Shares (as  determined  pursuant to Section 11(e) hereof) on
such record date less the fair market value (as  determined in good faith by the
Directors of the Company,  whose determination shall be described in a statement
filed with the Rights  Agent and shall be  conclusive  for all  purposes) of the
portion  of the  cash,  assets,  stock or  evidences  of  indebtedness  so to be
distributed (in the case of regular  periodic cash dividends at a rate in excess
of 125% of the  rate of the last  cash  dividend  theretofore  paid,  only  that
portion in excess of 125% of such rate) or of such subscription rights,  options
or warrants  applicable to one Common Share,  and the denominator of which shall
be such current per share market price of the Common  Shares.  Such  adjustments
shall be made  successively  whenever  such a record  date is fixed;  and in the
event that such  distribution  is not so made, the Purchase Price shall again be
adjusted to be the  Purchase  Price which would then be in effect if such record
date had not been fixed.

                  (d) In the event that,  following the Share  Acquisition Date,
directly or indirectly:

                           (i) the Company shall consolidate with, or merge with
or into,  any  other  Person  and the  Company  shall not be the  continuing  or
surviving corporation of such merger or consolidation; or

                     (ii) any Person  shall  consolidate  with the  Company,  or
merge with or into the Company and
the Company shall be the  continuing or surviving  corporation of such merger or
consolidation and, in connection with such merger or consolidation,  all or part
of the Common  Shares  shall be  changed  into or  exchanged  for stock or other
securities of any other Person or cash or any other property; or

                    (iii) the Company  shall sell or otherwise  transfer (or one
or more of its Subsidiaries  shall sell or otherwise  transfer),  in one or more
transactions, assets or earning power (including, without limitation, securities
creating  any  obligation  on  the  part  of  the  Company  and/or  any  of  its
Subsidiaries)  representing  in the  aggregate  more  than 50% of the  assets or
earning  power of the  Company  and its  Subsidiaries  (taken as a whole) to any
Person or Persons;

then,  and in each such case,  proper  provision  shall be made so that (A) each
holder of a Right  (except  for  Rights  which are or  become  void as  provided
herein) shall thereafter have the right to receive, upon the exercise thereof in
accordance with the terms of this Agreement at an exercise price per Right equal
to the product of two times the  then-current  Purchase Price  multiplied by the
number of Common Shares for which a Right was exercisable  immediately  prior to
the first occurrence of a Triggering  Event,  such number of validly  authorized
and issued, fully paid,  nonassessable and freely tradeable Common Shares of the
Issuer  (as such term is  hereinafter  defined),  free and  clear of any  liens,
encumbrances  and other adverse  claims and not subject to any rights of call or
first refusal,  as shall be equal to the result  obtained by (x) multiplying the
product of two (2) times the then-current Purchase Price by the number of Common
Shares  for  which  a  Right  is  exercisable  immediately  prior  to the  first
occurrence  of a Triggering  Event and  dividing  that product by (y) 50% of the
current per share  market price of the Common  Shares of the Issuer  (determined
pursuant to Section 11(e) hereof), on the date of consummation of such Flip-Over
Event;  (B) the Issuer  shall  thereafter  be liable for, and shall  assume,  by
virtue of the  consummation  of such Flip-Over  Event,  all the  obligations and
duties of the Company  pursuant to this Agreement;  (C) the term "Company" shall
thereafter be deemed to refer to the Issuer;  and (D) the Issuer shall take such
steps (including,  without limitation, the reservation of a sufficient number of
its  Common  Shares  to  permit  the  exercise  of all  outstanding  Rights)  in
connection  with  such  consummation  as may be  necessary  to  assure  that the
provisions hereof shall thereafter be applicable, as nearly as reasonably may be
possible,  in  relation to its Common  Shares  thereafter  deliverable  upon the
exercise of the Rights. For purposes of this Section 11(d),  "Issuer" shall mean
(A) in the case of any Flip-Over  Event  described in Sections  11(d)(i) or (ii)
above,  the Person that is the  continuing,  surviving,  resulting  or acquiring
Person  (including the Company as the  continuing or surviving  corporation of a
transaction  described in Section 11(d)(ii)  above),  and (B) in the case of any
Flip-Over Event described in Section  11(d)(iii)  above,  the Person that is the
party receiving the greatest portion of the assets or earning power  (including,
without  limitation,  securities  creating  any  obligation  on the  part of the
Company and/or any of its Subsidiaries) transferred pursuant to such transaction
or transactions;  provided, however, that, in any such case, (x) if (1) no class
of equity security of such Person is, at the time of such merger,  consolidation
or transaction and has been  continuously  over the preceding  12-month  period,
registered  pursuant to Section 12 of the Exchange Act, and (2) such Person is a
Subsidiary, directly or indirectly, of another Person a class of equity security
of which is and has been so registered,  the term "Issuer" shall mean such other
Person; and (y) in case such Person is a Subsidiary,  directly or indirectly, of
more than one Person a class of equity  security of two or more of which are and
have been so registered,  the term "Issuer" shall mean whichever of such Persons
is the issuer of the equity security having the greatest aggregate market value.
Notwithstanding  the  foregoing,  if the Issuer in any of the  Flip-Over  Events
listed  above is not a  corporation  or other legal  entity  having  outstanding
equity  securities then, and in each such case, (A) if the Issuer is directly or
indirectly   wholly  owned  by  a  corporation  or  other  legal  entity  having
outstanding  equity  securities,  then all  references  to Common  Shares of the
Issuer shall be deemed to be references to the Common Shares of the  corporation
or other legal entity having  outstanding  equity  securities  which  ultimately
controls  the  Issuer,  and (B) if there is no such  corporation  or other legal
entity having outstanding equity securities,  (1) proper provision shall be made
so that the Issuer shall create or otherwise  make available for purposes of the
exercise of the Rights in accordance  with the terms of this Agreement a kind or
kinds of security or securities having a fair market value at least equal to the
economic value of the Common Shares which each holder of a Right would have been
entitled to receive if the Issuer had been a  corporation  or other legal entity
having  outstanding  equity  securities  and (2) all  other  provisions  of this
Agreement  shall apply to the issuer of such  securities  as if such  securities
were Common Shares.  The Company shall not consummate any Flip-Over Event unless
the Issuer shall have a sufficient  number of authorized Common Shares (or other
securities  as  contemplated  above)  which have not been issued or reserved for
issuance to permit the  exercise in full of the Rights in  accordance  with this
Section 11(d), and unless prior to such  consummation the Company and the Issuer
shall have executed and delivered to the Rights Agent a  supplemental  agreement
providing for the terms set forth in Section 11(d) and further providing that as
promptly as practicable after the consummation of any Flip-Over Event the Issuer
shall:

                  (A)  prepare  and  file a  registration  statement  under  the
Securities  Act,  on an  appropriate  form,  with  respect to the Rights and the
securities  issuable  upon exercise of the Rights and shall use its best efforts
to  cause  such  registration  statement  to (1)  become  effective  as  soon as
practicable after such filing and (2) remain effective (with a prospectus at all
times meeting the  requirements  of the Securities Act) until the earlier of the
Expiration Date and the Final Expiration Date;

                  (B) take all such action as may be  appropriate  under,  or to
ensure  compliance with, the securities or "blue sky" laws of the various states
in connection with the exercisability of the Rights; and
                  (C)  deliver to holders  of the  Rights  historical  financial
statements  for the  Issuer  and  each of its  Affiliates  which  comply  in all
respects with the  requirements  for  registration  on Form 10 (or any successor
form) under the Exchange Act.

The provisions of this Section 11(d) shall similarly apply to successive mergers
or  consolidations  or sales or other  transfers.  In the event that a Flip-Over
Event occurs at any time after the  occurrence  of a Flip-In  Event,  the Rights
which have not theretofore been exercised shall thereafter become exercisable in
the manner described in this Section 11(d).

                  In the  event  that the  Company  shall be the  continuing  or
surviving  corporation in a merger or consolidation  referred to in subparagraph
(ii) above and Common  Shares of the  Company  are  required  to be issued  upon
exercise  of the Rights  following  such merger or  consolidation,  and if there
shall not be sufficient  authorized but unissued Common Shares or authorized and
issued  Common  Shares held in  treasury  to permit the  exercise in full of the
Rights in accordance with the foregoing,  the Directors of the Company shall use
their best  efforts  promptly to authorize  and,  subject to the  provisions  of
Section  9  hereof,  make  available  for  issuance  additional  Common  Shares;
provided,  however,  that if,at any time after 90 calendar  days after the first
occurrence of a Triggering  Event,  there shall not be sufficient  Common Shares
available  for  issuance  upon the exercise of a Right,  then the Company  shall
deliver,  upon the surrender of such Right and without  requiring payment of the
Purchase Price,  Common Shares (to the extent  available) and then cash or other
property  or  securities  (to the extent  permitted  by  applicable  law and any
agreements or instruments to which the Company is a party in effect  immediately
prior to the first occurrence of any Triggering Event),  which Common Shares and
cash  shall have an  aggregate  value  equal to the excess of (x) the  aggregate
current per share market price (determined  pursuant to Section 11(e) hereof) of
all the Common Shares  issuable in  accordance  with this Section 11(d) upon the
exercise  of a Right over (y) the  product of the  then-current  Purchase  Price
multiplied  by the  number of Common  Shares  for which a Right was  exercisable
immediately  prior to the occurrence of the merger or consolidation  referred to
in  subparagraph  (ii)  above.  To the  extent  that any  legal  or  contractual
restrictions  prevent the Company from paying the full amount of cash payable in
accordance with the foregoing sentence,  the Company shall pay to holders of the
Rights as to which  such  payments  are being  made,  on a pro rata  basis,  all
amounts  which are not then  restricted.  The  Company  shall  continue  to make
payments on a pro rata basis as funds become  available until such payments have
been paid in full.

                  (e) For the purpose of any computation hereunder, the "current
per share market  price" of Common  Shares on any date shall be deemed to be the
average of the daily  closing  prices per share of such Common Shares for the 30
consecutive Trading Days (as such term is hereinafter defined) immediately prior
to such date;  provided,  however,  that in the event that the current per share
market price of the Common  Shares is determined  during a period  following the
announcement  by  the  issuer  of  such  Common  Shares  (i)  of a  dividend  or
distribution  on such Common Shares  payable in such Common Shares or securities
convertible  into such Common  Shares or (ii) any  subdivision,  combination  or
reclassification  of such  Common  Shares,  and  prior to the  expiration  of 30
Trading Days after the ex-dividend date for such dividend or distribution or the
record date for such subdivision, combination or reclassification,  then, and in
each such case, the "current  market price" shall be  appropriately  adjusted to
take into account ex-dividend trading or to reflect the current market price per
Common Share  equivalent.  The closing price for each day shall be the last sale
price,  regular  way,  or, in case no such  sale  takes  place on such day,  the
average of the  closing  bid and asked  prices,  regular  way, in either case as
reported in the principal consolidated transaction reporting system with respect
to securities  listed or admitted to trading on the New York Stock  Exchange or,
if the Common Shares are not listed or admitted to trading on the New York Stock
Exchange, as reported in the principal consolidated transaction reporting system
with respect to securities listed on the principal national  securities exchange
on which the Common  Shares are listed or  admitted to trading or, if the Common
Shares  are not  listed  or  admitted  to  trading  on any  national  securities
exchange,  the last quoted  price or, if not so quoted,  the average of the high
bid and low asked  prices in the  over-the-counter  market,  as  reported by the
National  Association of Securities  Dealers,  Inc.  Automated  Quotation System
("NASDAQ")  or such other system then in use, or, if on any such date the Common
Shares are not quoted by any such  organization,  the average of the closing bid
and asked prices as furnished by a professional  market maker making a market in
the Common Shares  selected by the  Directors of the Company.  The term "Trading
Day" shall mean any day on which the principal national  securities  exchange on
which the  Common  Shares  are  listed or  admitted  to  trading is open for the
transaction  of business or, if the Common  Shares are not listed or admitted to
trading on any  national  securities  exchange,  a Monday,  Tuesday,  Wednesday,
Thursday or Friday on which  banking  institutions  in the State of New York are
not  authorized or obligated by law or executive  order to close.  If the Common
Shares are not publicly  held or not so listed or traded,  or not the subject of
available bid and asked quotes,  "current per share market price" shall mean the
fair  value  per  share as  determined  in good  faith by the  Directors  of the
Company,  whose  determination  shall be described in a statement filed with the
Rights Agent and shall be conclusive for all purposes.
                  (f) Except as set forth below,  no  adjustment in the Purchase
Price shall be  required  unless such  adjustment  would  require an increase or
decrease of at least 1% in such price;  provided,  however, that any adjustments
which by  reason of this  Section  11(f) are not  required  to be made  shall be
carried  forward  and taken  into  account  in any  subsequent  adjustment.  All
calculations  under this  Section 11 shall be made to the nearest cent or to the
nearest  thousandth of a share,  as the case may be.  Notwithstanding  the first
sentence of this Section 11(f), any adjustment required by this Section 11 shall
be made no later  than  the  earlier  of (i)  three  years  from the date of the
transaction which requires such adjustment or (ii) the date of the expiration of
the right to exercise any Rights.

                  (g) If, as a result of an adjustment  made pursuant to Section
11(a) hereof, the holder of any Right thereafter exercised shall become entitled
to receive any shares of capital stock of the Company other than Common  Shares,
thereafter  the number of such other shares so  receivable  upon exercise of any
Right shall be subject to adjustment  from time to time in a manner and on terms
as nearly equivalent as practicable to the provisions with respect to the shares
contained  in this  Section 11, and the  provisions  of Sections 7, 9, 10 and 14
hereof with  respect to the Common  Shares shall apply on like terms to any such
other shares. In the event that the Rights become exercisable under both Section
11(a)(ii)  and Section  11(d)  hereof,  a holder  may,  at his option,  elect to
exercise  Rights under either  provision,  but each Right may be exercised  only
once.

                  (h) All Rights originally issued by the Company  subsequent to
any adjustment  made to the Purchase Price hereunder shall evidence the right to
purchase,   at  the  adjusted  Purchase  Price,  the  number  of  Common  Shares
purchasable from time to time hereunder upon exercise of the Rights, all subject
to further adjustment as provided herein.

                  (i) Unless the Company  shall have  exercised  its election as
provided in Section 11(j) hereof,  upon each adjustment of the Purchase Price as
a result of the  calculations  made in Sections  11(b) and (c) hereof each Right
outstanding  immediately prior to the making of such adjustment shall thereafter
evidence the right to purchase,  at the adjusted  Purchase Price, that number of
shares  (calculated to the nearest  thousandth)  obtained by (i) multiplying (x)
the number of shares covered by a Right  immediately prior to this adjustment by
(y) the Purchase  Price in effect  immediately  prior to such  adjustment of the
Purchase  Price and (ii) dividing the product so obtained by the Purchase  Price
in effect immediately after such adjustment of the Purchase Price.

                  (j)  The  Company  may  elect,  on or  after  the  date of any
adjustment of the Purchase Price, to adjust the number of Rights in substitution
for any adjustment in the number of Common Shares  purchasable upon the exercise
of a Right.  Each of the Rights  outstanding after such adjustment of the number
of Rights shall be exercisable for the number of Common Shares for which a Right
was exercisable immediately prior to such adjustment.  Each Right held of record
prior to such  adjustment  of the number of Rights  shall  become that number of
Rights (calculated to the nearest thousandth)  obtained by dividing the Purchase
Price in effect  immediately  prior to adjustment  of the Purchase  Price by the
Purchase Price in effect immediately after adjustment of the Purchase Price. The
Company shall make a public announcement of its election to adjust the number of
Rights, indicating the record date for the adjustment and, if known at the time,
the amount of the  adjustment  to be made.  This  record date may be the date on
which the  Purchase  Price is adjusted or any day  thereafter  but, if the Right
Certificates  have been issued, it shall be at least 10 calendar days later than
the date of the public  announcement.  If Right  Certificates  have been issued,
upon each  adjustment of the number of Rights pursuant to this Section 11(j) the
Company shall, as promptly as practicable, cause to be distributed to holders of
record of Right Certificates on such record date Right Certificates  evidencing,
subject to Section 14 hereof,  the additional Rights to which such holders shall
be entitled as a result of such adjustment or, at the option of the Company,  in
substitution  and  replacement for the Right  Certificates  held by such holders
prior to the date of adjustment,  and upon surrender thereof, if required by the
Company, new Right Certificates  evidencing all the Rights to which such holders
shall be entitled after such adjustment. Right Certificates so to be distributed
shall be issued,  executed and  countersigned  in the manner provided for herein
(and may bear, at the option of the Company,  the adjusted  Purchase  Price) and
shall be registered in the names of the holders of record of Right  Certificates
on the record date specified in the public announcement.

                  (k)  Irrespective  of any adjustment or change in the Purchase
Price or the number or type of shares  issuable upon the exercise of the Rights,
the Right Certificates theretofore and thereafter issued may continue to express
the Purchase Price per whole share and the number of shares which were expressed
in the initial Right Certificate issued hereunder.

                  (l) Before  taking any action that would  cause an  adjustment
reducing  the  Purchase  Price  below the then par value,  if any, of the Common
Shares  issuable  upon  exercise  of the  Rights,  the  Company  shall  take any
corporate action which may, in the opinion of its counsel, be necessary in order
that the Company may  validly  and  legally  issue fully paid and  nonassessable
Common Shares at such adjusted Purchase Price.

                  (m) In any case in which this Section 11 shall require that an
adjustment  in the  Purchase  Price be made  effective as of a record date for a
specified  event,  the Company may elect to defer until the  occurrence  of such
event the  issuing to the holder of any Right  exercised  after such record date
the Common Shares and other capital stock or securities of the Company,  if any,
issuable  upon such  exercise over and above the Common Shares and other capital
stock or securities of the Company,  if any,  issuable upon such exercise on the
basis of the  Purchase  Price in  effect  prior  to such  adjustment;  provided,
however,  that the  Company  shall  deliver  to such  holder a due bill or other
appropriate instrument evidencing such holder's right to receive such additional
shares upon the occurrence of the event requiring such adjustment.

                  (n) Anything in Sections 11 (a) through (m), inclusive, hereof
to the  contrary  notwithstanding,  the  Company  shall be entitled to make such
reductions in the Purchase  Price,  in addition to those  adjustments  expressly
required by this Section 11, as and to the extent that it in its sole discretion
shall determine to be advisable in order that any  consolidation  or subdivision
of the Common  Shares,  issuance  wholly for cash of any of the Common Shares at
less than the current market price, issuance wholly for cash of Common Shares or
securities  which by their terms are convertible into or exchangeable for Common
Shares,  stock dividends or issuance of rights,  options or warrants referred to
hereinabove in this Section 11,  hereafter made by the Company to holders of its
Common Shares shall not be taxable to such shareholders.

                  (o) Notwithstanding any other provision of this Agreement,  no
adjustment  to the Purchase  Price (other than pursuant to Section  11(n)),  the
number  of  Common  Shares  (or  fractions  of a  share)  for  which a Right  is
exercisable or the number of Rights outstanding shall be made or be effective if
such  adjustment  would have the effect of reducing or limiting the benefits the
holders of the Rights would have had absent such adjustment,  including, without
limitation,  the benefits under Sections 11(a)(ii) and 11(d) hereof,  unless the
terms of this Agreement are amended so as to preserve such benefits.

                  (p)  Notwithstanding  the provisions of Sections 11(a)(ii) and
11(d) hereof,  the Board of Directors of the Company may, at its option,  at any
time  after the later of the  Distribution  Date and the first  occurrence  of a
Triggering Event,  exchange all or part of the  then-outstanding and exercisable
Rights  (which  shall not include  Rights that have become void  pursuant to the
provisions of Section  11(a)(ii)  hereof) for Common Shares at an exchange ratio
of one  Common  Share per Right,  appropriately  adjusted  to reflect  any stock
split,  stock dividend or similar  transaction  occurring  after the date hereof
(such exchange  ratio being  hereinafter  referred to as the "Exchange  Ratio").
Immediately upon the action of the Directors ordering the exchange of any Rights
pursuant to this Section  11(p),  and without any further action and without any
notice,  the right to exercise  such Rights shall  terminate  and the only right
with respect to such Rights  thereafter of the holder of such Rights shall be to
receive that number of Common  Shares equal to the number of such Rights held by
such holder  multiplied by the Exchange Ratio.  Promptly after the action of the
Directors of the Company  ordering  the exchange of any Rights  pursuant to this
Section 11(p),  the Company shall publicly  announce such action,  and within 10
calendar  days  thereafter  shall give notice of any such exchange to all of the
holders of such Rights at their last  addresses as they appear upon the registry
books of the Rights Agent;  provided,  however, that the failure to give, or any
defect in,  such notice  shall not affect the  validity  of such  exchange.  Any
notice which is mailed or  transmitted  in the manner herein  provided  shall be
deemed given, whether or not the holder receives the notice. Each such notice of
exchange  shall state the method by which the exchange of the Common  Shares for
Rights will be effected and, in the event of any partial exchange, the number of
Rights which will be exchanged.  Any partial exchange shall be effected pro rata
based on the number of Rights (other than Rights which have become void pursuant
to the provisions of Section  11(a)(ii))  held by each holder of Rights.  In any
exchange  pursuant to this  Section  11(p),  the  Company,  at its  option,  may
substitute for any Common Share  exchangeable  for a Right,  (i) cash, (ii) debt
securities of the Company,  (iii) other assets,  or (iv) any  combination of the
foregoing,  in any event  having an aggregate  value which the  Directors of the
Company shall have determined in good faith to be equal to the current per share
market price of one Common Share  (determined  pursuant to Section 11(e) hereof)
on the Trading Day immediately  preceding the date of exchange  pursuant to this
Section  11(p).  The Company shall not be required to issue  fractions of Common
Shares or to distribute  certificates  which evidence  fractional  Common Shares
upon the exchange of a Right.  In lieu of such  fractional  Common  Shares,  the
Company  shall pay to the  registered  holders  of the Right  Certificates  with
regard to which such  fractional  Common  Shares would  otherwise be issuable an
amount in cash equal to the same  fraction of the current per share market price
of a whole Common Share  (determined  pursuant to Section  11(e)  hereof) on the
Trading Day immediately  preceding the date of exchange pursuant to this Section
11(p).

                  Section 12.  CERTIFICATE OF ADJUSTED  PURCHASE PRICE OR NUMBER
OF SHARES.  Whenever an adjustment is made as provided in Section 11 hereof, the
Company  shall  promptly  prepare a certificate  setting  forth such  adjustment
(including  a  description  of any  Rights  which have  become  void as a result
thereof) and a brief  statement of the facts  accounting for such adjustment and
promptly file with the Rights Agent and with each transfer  agent for the Common
Shares a copy of such certificate.

                  Section  13.  NOTICE OF ADJUSTED  PURCHASE  PRICE OR NUMBER OR
TYPE OF SHARES TO HOLDERS OF RIGHTS.  Whenever an adjustment is made as provided
in Section 11 hereof  after the  Distribution  Date,  the Company  shall mail or
transmit  a  brief  summary  of  such  adjustment  to  each  holder  of a  Right
Certificate in accordance with Section 25 hereof.

                  Section 14. FRACTIONAL RIGHTS AND FRACTIONAL  SHARES.  (a) The
Company shall not be required to issue  fractions of Rights or to distribute any
Right Certificates which evidence  fractional Rights. In lieu of such fractional
Rights, there shall be paid as promptly as practicable to the registered holders
of the Right  Certificates  with regard to which such  fractional  Rights  would
otherwise  be  issuable  an amount  in cash  equal to the same  fraction  of the
current  market value of a whole Right.  For the purposes of this Section 14(a),
the current  market  value of a whole  Right  shall be the closing  price of the
Rights  for  the  Trading  Day  immediately  prior  to the  date on  which  such
fractional Rights would have been otherwise issuable.  The closing price for any
day shall be the last sale price,  regular  way,  or, in case no such sale takes
place on such day, the average of the closing bid and asked prices, regular way,
in either case as reported in the principal  consolidated  transaction reporting
system with respect to securities  listed or admitted to trading on the New York
Stock  Exchange  or, if the Rights are not listed or  admitted to trading on the
New York Stock Exchange, as reported in the principal  consolidated  transaction
reporting  system with respect to securities  listed on the  principal  national
securities exchange on which the Rights are listed or admitted to trading or, if
the Rights  are not listed or  admitted  to trading on any  national  securities
exchange,  the last quoted  price or, if not so quoted,  the average of the high
bid and low asked prices in the  over-the-counter  market, as reported by NASDAQ
or such  other  system  then in use or, if on any such date the  Rights  are not
quoted by any such organization, the average of the closing bid and asked prices
as  furnished  by a  professional  market  maker  making a market in the  Rights
selected by the  Directors  of the  Company.  If on any such date no such market
maker is making a market in the Rights the fair value of the Rights on such date
as  determined  in good faith by the  Directors of the Company shall be used and
shall be conclusive for all purposes.

                  (b) The Company  shall not be required to issue  fractions  of
shares upon exercise of the Rights or to distribute  certificates which evidence
fractional  shares.  Fractions  of Common  Shares  may,  at the  election of the
Company,  be  evidenced  by  depositary  receipts  pursuant  to  an  appropriate
agreement  between the Company and a depositary  selected by it,  provided  that
such agreement shall provide that the holders of such depositary  receipts shall
have all the rights,  privileges  and  preferences to which they are entitled as
beneficial  owners of Common Shares. In lieu of fractional  shares,  the Company
may pay to the registered  holders of Right Certificates at the time such Rights
are exercised as herein provided an amount in cash equal to the same fraction of
the current  market  value of one Common  Share.  For  purposes of this  Section
14(b),  the current market value of a Common Share shall be the closing price of
a Common Share (as determined  pursuant to the second  sentence of Section 11(e)
hereof) for the Trading Day immediately prior to the date of such exercise.

                  (c) The  holder of a Right,  by the  acceptance  of the Right,
expressly  waives his right to receive any  fractional  Rights or any fractional
shares upon exercise of a Right.

                  Section 15. RIGHTS OF ACTION.  All rights of action in respect
of this Agreement are vested in the respective  registered  holders of the Right
Certificates (and, prior to the Distribution Date, the registered holders of the
Common Shares); and any registered holder of any Right Certificate (or, prior to
the Distribution Date, of the Common Shares),  without the consent of the Rights
Agent  or of the  holder  of any  other  Right  Certificates  (or,  prior to the
Distribution Date, of the Common Shares), may, in his own behalf and for his own
benefit,  enforce, and may institute and maintain any suit, action or proceeding
against  the Company to enforce,  or  otherwise  act in respect of, his right to
exercise the Rights  evidenced by such Right  Certificate in the manner provided
in such Right Certificate and in this Agreement.  Without limiting the foregoing
or  any  remedies  available  to  the  holders  of  Rights,  it is  specifically
acknowledged that the holders of Rights would not have an adequate remedy at law
for any  breach  of this  Agreement,  and  they  will be  entitled  to  specific
performance  of the  obligations  under this  Agreement  and  injunctive  relief
against actual or threatened violations of the obligations of any Person subject
to this Agreement.

                  Section 16.  AGREEMENT  OF RIGHTS  HOLDERS.  Every holder of a
Right, by accepting the same,  consents and agrees with the Company,  the Rights
Agent and every other holder of a Right that:

                  (a)  prior  to the  Distribution  Date,  the  Rights  will  be
transferable only in connection with the transfer of the Common Shares;

                  (b) after the Distribution  Date, the Right  Certificates will
be transferable only on the registry books of the Rights Agent if surrendered at
the principal office of the Rights Agent in New York, New York, duly endorsed or
accompanied by a proper instrument of transfer;

                  (c) the  Company  and the Rights  Agent may deem and treat the
person in whose name the Right Certificate (or, prior to the Distribution  Date,
the  associated  Common Share  certificate)  is registered as the absolute owner
thereof and of the Rights evidenced  thereby  (notwithstanding  any notations of
ownership or writing on the Right  Certificate  or the  associated  Common Share
certificate  made by anyone other than the Company or the Rights  Agent) for all
purposes  whatsoever,  and neither  the  Company  nor the Rights  Agent shall be
affected by any notice to the contrary; and

                  (d)   notwithstanding   anything  in  this  Agreement  to  the
contrary,  neither the Company nor the Rights Agent shall have any  liability to
any holder of a Right or other  Person as a result of its  inability  to perform
any of its  obligations  under this  Agreement by reason of any  preliminary  or
permanent  injunction  or other  order,  decree or  ruling  issued by a court of
competent jurisdiction or by a governmental, regulatory or administrative agency
or commission,  or any statute,  rule, regulation or executive order promulgated
or enacted by any governmental  authority,  prohibiting or otherwise restraining
performance of such  obligation;  provided,  however,  that the Company must use
reasonable efforts to have any such order,  decree or ruling lifted or otherwise
overturned as soon as possible.

                  Section 17. RIGHT CERTIFICATE HOLDER NOT DEEMED A SHAREHOLDER.
No holder, as such, of any Right Certificate shall be entitled to vote,  receive
dividends or be deemed for any purpose the holder of the Common Shares or of any
other  securities of the Company which may at any time be issuable upon exercise
of the Rights represented thereby, nor shall anything contained herein or in any
Right  Certificate  be  construed  to  confer  upon  the  holder  of  any  Right
Certificate,  as such,  any of the rights of a shareholder of the Company or any
right to vote for the  election of  directors  or upon any matter  submitted  to
shareholders  at any  meeting  thereof,  or to give or  withhold  consent to any
corporate  action,  or to receive notice of meetings or other actions  affecting
shareholders  (except as provided in Section 24 hereof), or to receive dividends
or subscription  rights,  or otherwise,  until the Right or Rights  evidenced by
such Right  Certificate  shall have been exercised in accordance  with Section 7
hereof or exchanged pursuant to the provisions of Section 11(p) hereof.

                  Section 18. CONCERNING THE RIGHTS AGENT. The Company agrees to
pay to the Rights Agent reasonable  compensation for all services rendered by it
hereunder and, from time to time, on demand of the Rights Agent,  its reasonable
expenses and counsel fees and other disbursements incurred in the administration
and execution of this  Agreement and the exercise and  performance of its duties
hereunder.  The Company  also agrees to  indemnify  the Rights Agent for, and to
hold it harmless  against,  any loss,  liability,  suit,  action,  proceeding or
expense,  incurred without  negligence,  bad faith or willful  misconduct on the
part of the Rights  Agent,  for anything  done or omitted by the Rights Agent in
connection with the acceptance and  administration of this Agreement,  including
the costs and  expenses  of  defending  against any claim of  liability.  If the
Rights Agent asserts or intends to assert a right of indemnification  under this
Section 18 in connection  with a suit,  action or proceeding,  the Company shall
have the right,  but not the obligation,  to assume the  responsibility  for the
defense of any such suit, action or proceeding.

                  The  Rights  Agent  shall  be  protected  and  shall  incur no
liability  for or in respect of any action  taken,  suffered or omitted by it in
connection with its  administration of this Agreement in reliance upon any Right
Certificate  or  certificate  for Common  Shares or for other  securities of the
Company,  instrument of assignment or transfer, power of attorney,  endorsement,
affidavit, letter, notice, direction, consent, certificate,  statement, or other
paper or document  believed by it to be genuine and to be signed,  executed and,
where necessary, verified or acknowledged, by the proper person or persons.

                  Section  19.  MERGER  OR  CONSOLIDATION  OR  CHANGE OF NAME OF
RIGHTS  AGENT.  Any  corporation  into which the Rights  Agent or any  successor
Rights  Agent  may be  merged  or  with  which  it may be  consolidated,  or any
corporation resulting from any merger or consolidation to which the Rights Agent
or any successor Rights Agent shall be a party, or any corporation succeeding to
the corporate trust business of the Rights Agent or any successor  Rights Agent,
shall be the  successor  to the Rights  Agent under this  Agreement  without the
execution  or filing of any paper or any  further  act on the part of any of the
parties hereto, provided that such corporation would be eligible for appointment
as a successor  Rights Agent under the provisions of Section 21 hereof.  In case
at the time such  successor  Rights Agent shall succeed to the agency created by
this Agreement,  any of the Right Certificates shall have been countersigned but
not delivered, any such successor Rights Agent may adopt the countersignature of
the   predecessor   Rights  Agent  and  deliver  such  Right   Certificates   so
countersigned; and in case at that time any of the Rights Certificates shall not
have been  countersigned,  any successor Rights Agent may countersign such Right
Certificates  either in the name of the predecessor  Rights Agent or in the name
of the  successor  Rights Agent;  and in all such cases such Right  Certificates
shall  have  the full  force  provided  in the  Right  Certificates  and in this
Agreement.

                  In case at any  time  the name of the  Rights  Agent  shall be
changed  and at  such  time  any of  the  Right  Certificates  shall  have  been
countersigned but not delivered, the Rights Agent may adopt the countersignature
under its prior name and deliver Right  Certificates  so  countersigned;  and in
case  at  that  time  any  of  the  Right   Certificates  shall  not  have  been
countersigned,  the Rights Agent may countersign such Right Certificates  either
in its prior  name or in its  changed  name;  and in all such  cases  such Right
Certificates shall have the full force provided in the Right Certificates and in
this Agreement.
                  Section  20.  DUTIES  OF  RIGHTS   AGENT.   The  Rights  Agent
undertakes  the  duties  and  obligations  imposed  by this  Agreement  upon the
following terms and  conditions,  by all of which the Company and the holders of
Right Certificates, by their acceptance thereof, shall be bound:

                  (a) The Rights Agent may consult  with legal  counsel (who may
be legal counsel for the Company), and the opinion of such counsel shall be full
and complete  authorization  and protection to the Rights Agent as to any action
taken or omitted by it in good faith and in accordance with such opinion.

                  (b)  Whenever  in the  performance  of its  duties  under this
Agreement the Rights Agent shall deem it necessary or desirable that any fact or
matter be proved or  established by the Company prior to taking or suffering any
action hereunder,  such fact or matter (unless other evidence in respect thereof
be herein  specifically  prescribed) may be deemed to be conclusively proved and
established by a certificate signed by any one of the Chairman of the Board, the
Chief Executive  Officer,  the President or the Chief  Financial  Officer of the
Company and delivered to the Rights Agent;  and such  certificate  shall be full
authorization to the Rights Agent for any action taken or suffered in good faith
by it under the provisions of this Agreement in reliance upon such certificate.

                  (c) The Rights  Agent shall be liable  hereunder  only for its
own negligence, bad faith or willful misconduct.

                  (d) The Rights  Agent  shall not be liable for or by reason of
any of the statements of fact or recitals  contained in this Agreement or in the
Right  Certificates  (except  its  countersignature  thereof)  or be required to
verify the same, but all such statements and recitals are and shall be deemed to
have been made by the Company only.

                  (e) The Rights Agent shall not be under any  responsibility in
respect of the validity of this  Agreement or the execution and delivery  hereof
(except the due execution and delivery hereof by the Rights Agent) or in respect
of  the   validity  or   execution   of  any  Right   Certificate   (except  its
countersignature  thereof);  nor shall it be  responsible  for any breach by the
Company of any covenant or condition contained in this Agreement or in any Right
Certificate;  nor shall it be responsible for any adjustment  required under the
provisions  of Section 11 hereof  (including  any  adjustment  which  results in
Rights  becoming  void) or responsible  for the manner,  method or amount of any
such adjustment or the ascertaining of the existence of facts that would require
any such adjustment  (except with respect to the exercise of Rights evidenced by
Right Certificates after actual notice of any such adjustment or voidance);  nor
shall it by any act hereunder be deemed to make any  representation  or warranty
as to the  authorization  or  reservation  of any  Common  Shares  to be  issued
pursuant to this Agreement or any Right  Certificate or as to whether any Common
Shares  will,  when issued,  be validly  authorized  and issued,  fully paid and
nonassessable.

                  (f)  The  Company  agrees  that  it  will  perform,   execute,
acknowledge and deliver,  or cause to be performed,  executed,  acknowledged and
delivered,  all such further and other acts,  instruments  and assurances as may
reasonably be required by the Rights Agent for the carrying out or performing by
the Rights Agent of the provisions of this Agreement.

                  (g) The Rights  Agent is hereby  authorized  and  directed  to
accept instructions with respect to the performance of its duties hereunder from
any one of the Chairman of the Board, the Chief Executive Officer, the President
or the Chief Financial  Officer of the Company and to apply to such officers for
advice or instructions in connection with its duties, and it shall not be liable
for any action  taken or suffered to be taken by it in good faith in  accordance
with instructions of any such officer.

                  (h) The Rights Agent, and any stockholder,  director,  officer
or employee of the Rights  Agent,  may buy, sell or deal in any of the Rights or
other  securities  of  the  Company,   become  pecuniarily   interested  in  any
transaction in which the Company may be interested,  contract with or lend money
to the Company or otherwise act as fully and freely as though it were not Rights
Agent under this Agreement.  Nothing herein shall preclude the Rights Agent from
acting in any other capacity for the Company or for any other legal entity.

                  (i) The  Rights  Agent may  execute  and  exercise  any of the
rights or powers hereby vested in it or perform any duty hereunder either itself
or by or through  its  attorneys  or agents,  and the Rights  Agent shall not be
answerable or  accountable  for any act,  default,  neglect or misconduct of any
such attorneys or agents or for any loss to the Company  resulting from any such
act, default,  neglect or misconduct  provided  reasonable care was exercised in
the selection and continued  employment  thereof.  The Rights Agent shall not be
under  any duty or  responsibility  to  insure  compliance  with any  applicable
federal or state  securities laws in connection  with the issuance,  transfer or
exchange of Right Certificates.

                  (j) The Rights Agent shall  promptly  remit to the Company any
funds paid to it upon exercise of the Rights pursuant to Section 7 hereof.

                  Section 21.  CHANGE OF RIGHTS  AGENT.  The Rights Agent or any
successor  Rights Agent may resign and be discharged  from its duties under this
Agreement  upon 30 days'  notice in writing  mailed to the  Company  and to each
transfer agent of the Common Shares by registered or certified  mail, and to the
holders of the Right  Certificates  by first-class  mail. The Company may remove
the Rights Agent or any successor  Rights Agent upon 30 days' notice in writing,
mailed or otherwise  transmitted to the Rights Agent or successor  Rights Agent,
as the  case  may  be,  and to each  transfer  agent  of the  Common  Shares  by
registered  or certified  mail (or such other  method as the Company  shall deem
appropriate),  and to the holders of the Right  Certificates by first-class mail
(or such other  method as the  Company  shall deem  appropriate).  If the Rights
Agent shall resign or be removed or shall otherwise  become incapable of acting,
the Company shall appoint a successor to the Rights Agent.  If the Company shall
fail to make such appointment  within a period of 30 days after giving notice of
such  removal or after it has been  notified in writing of such  resignation  or
incapacity by the resigning or incapacitated  Rights Agent or by the holder of a
Right Certificate (who shall, with such notice, submit his Right Certificate for
inspection by the Company),  then the registered holder of any Right Certificate
may apply to any court of competent  jurisdiction  for the  appointment of a new
Rights Agent. Any successor Rights Agent, whether appointed by the Company or by
such a court, shall be a corporation organized and doing business under the laws
of the United  States or of the State of New York (or of any other  state of the
United  States so long as such  corporation  is  authorized  to do business as a
banking  institution  in the  State of New  York),  in good  standing,  having a
principal  office in the State of New York,  which is authorized under such laws
to exercise  corporate trust powers and is subject to supervision or examination
by federal or state  authority and which has at the time of its  appointment  as
Rights  Agent a combined  capital  and surplus of at least $10 million and which
shall otherwise meet any requirements  imposed by the New York Stock Exchange on
transfer agents and registrars.  After  appointment,  the successor Rights Agent
shall be vested with the same powers,  rights, duties and responsibilities as if
it had been  originally  named as Rights Agent without  further act or deed; but
the predecessor  Rights Agent shall deliver and transfer to the successor Rights
Agent any property at the time held by it hereunder  and execute and deliver any
further assurance,  conveyance, act or deed necessary for the purpose. Not later
than the effective date of any such  appointment,  the Company shall file notice
thereof in writing with the predecessor  Rights Agent and each transfer agent of
the  Common  Shares  and mail or  transmit  a notice  thereof  in writing to the
registered  holders  of the  Right  Certificates.  Failure  to give  any  notice
provided  for in this  Section 21,  however,  or any defect  therein,  shall not
affect the  legality  or validity  of the  resignation  or removal of the Rights
Agent or the appointment of the successor Rights Agent, as the case may be.

                  Section   22.    ISSUANCE    OF   NEW   RIGHT    CERTIFICATES.
Notwithstanding  any of the provisions of this Agreement or of the Rights to the
contrary,  the  Company  may,  at  its  option,  issue  new  Right  Certificates
evidencing  Rights in such form as may be approved by its  Directors  to reflect
any  adjustment or change in the Purchase  Price and the number or kind or class
of  shares  or  other  securities  or  property   purchasable  under  the  Right
Certificates made in accordance with the provisions of this Agreement.

                  Section  23.  REDEMPTION.  (a)  Prior  to the  earlier  of the
Expiration  Date and the Final  Expiration  Date,  the  Directors of the Company
(with the  concurrence of a majority of the Continuing  Directors) may, at their
option,  redeem all but not less than all of the then-outstanding  Rights at the
Redemption  Price at any time prior to the Close of business on the later of (i)
the Distribution Date and (ii) the Share Acquisition Date.

                  (b)  Immediately  upon  the  action  of the  Directors  of the
Company  ordering the  redemption of the Rights,  and without any further action
and without any notice,  the right to exercise the Rights will terminate and the
only  right  thereafter  of the  holders  of  Rights  shall  be to  receive  the
Redemption  Price.  Promptly  after the  action of the  Directors  ordering  the
redemption  of the Rights,  the Company  shall  publicly  announce  such action.
Within 10 calendar days after ordering the redemption of the Rights, the Company
shall give  notice of such  redemption  to the  holders of the then  outstanding
Rights by mailing or transmitting  such notice to all such holders at their last
addresses as they appear upon the  registry  books of the Rights Agent or, prior
to the  Distribution  Date, on the registry  books of the transfer agent for the
Common Shares;  provided,  however,  that the failure to give, or any defect in,
any such notice shall not affect the validity of the  redemption  of the Rights.
Any notice which is mailed or transmitted in the manner herein provided shall be
deemed  given,  whether or not the holder  receives  the  notice.  The notice of
redemption mailed or transmitted to the holders of Rights shall state the method
by which the payment of the  Redemption  Price will be made. The Company may, at
its option,  pay the  Redemption  Price in cash,  Common  Shares (based upon the
current per share  market  price of the Common  Shares,  determined  pursuant to
Section  11(e)  hereof,  at the  time  of  redemption)  or  any  other  form  of
consideration deemed appropriate by the Directors of the Company (based upon the
fair market value of such other  consideration,  determined  by the Directors of
the Company in good faith) or any combination thereof.

                  (c) At any time  following  the Share  Acquisition  Date,  the
Directors of the Company may relinquish  their rights to redeem the Rights under
paragraph (a) above by duly  adopting a resolution  to that effect.  Immediately
upon adoption of such resolution, the rights of the Directors under the portions
of this Section 23 specified in such resolution shall terminate  without further
action and without any notice.

                  (d)  Notwithstanding  anything  in  this  Section  23  to  the
contrary,  all rights of, and requirements for, redemption set forth above shall
terminate  immediately and automatically  upon the occurrence of any one or more
of the events set forth in  Sections  11(a)(ii)  or Sections  11(d)(i),  (ii) or
(iii), hereof.

                  Section  24.  NOTICE OF  CERTAIN  EVENTS.  In case,  after the
Distribution  Date, the Company shall propose (a) to pay any dividend payable in
stock  of any  class to the  holders  of  Common  Shares  or to make  any  other
distribution to the holders of Common Shares (other than a regular periodic cash
dividend  at a rate not in excess of 125% of the rate of the last cash  dividend
theretofore paid), (b) to offer to the holders of Common Shares rights,  options
or warrants to subscribe  for or to purchase  any  additional  Common  Shares or
shares of stock of any class or any other securities,  rights or options, (c) to
effect any  reclassification of its Common Shares (other than a reclassification
involving only the subdivision of outstanding Common Shares),  (d) to effect any
consolidation  or merger,  or to effect any sale or other transfer (or to permit
one or more of its Subsidiaries to effect any sale or other transfer), in one or
more  transactions,  of more  than 50% of the  assets  or  earning  power of the
Company and its Subsidiaries,  taken as a whole, to any other Person or Persons,
or (e) to effect the  liquidation,  dissolution  or  winding up of the  Company,
then,  in each such  case,  the  Company  shall  give to each  holder of a Right
Certificate,  in  accordance  with Section 25 hereof,  a notice of such proposed
action  specifying  the record  date for the  purposes  of such stock  dividend,
distribution  or offering of rights,  options or warrants,  or the date on which
such  reclassification,  consolidation,  merger,  sale,  transfer,  liquidation,
dissolution,  or  winding  up is to take  place  and the  date of  participation
therein by the  holders of the Common  Shares,  if any such date is to be fixed,
and such notice shall be so given,  in the case of any action  covered by clause
(a) or (b)  above,  at least 20  calendar  days  prior  to the  record  date for
determining holders of the Common Shares for purposes of such action and, in the
case of any such other  action,  at least 20 calendar  days prior to the date of
the taking of such proposed action or the date of  participation  therein by the
holders of the Common Shares, whichever shall be the earlier.

                  In case any of the events set forth in  Section  11(a)(ii)  or
Section 11(d) hereof shall occur,  then, in any such case,  the Company shall as
soon as  practicable  thereafter  give to the Rights  Agent and each holder of a
Right  Certificate,  in  accordance  with  Section  25  hereof,  a notice of the
occurrence of such event  specifying the event and the consequences of the event
to holders of Rights.

                  Section 25.  NOTICES.  Notices or demands  authorized  by this
Agreement to be given or made by the Rights Agent, or by the holder of any Right
Certificate, to or on the Company shall be sufficiently given or made if sent by
first-class mail, postage prepaid,  addressed (until another address is filed in
writing with the Rights Agent) as follows:

                           Medco Research, Inc.
                           P.O. Box 13886
                           Research Triangle Park, NC  27709
                           Attention:  Chief Financial Officer

Subject to the provisions of Section 21 hereof,  any notice or demand authorized
by this  Agreement to be given or made by the  Company,  or by the holder of any
Right Certificate, to or on the Rights Agent shall be sufficiently given or made
if sent by first-class mail,  postage prepaid,  addressed (until another address
is filed in writing with the Company) as follows:

                           American Stock Transfer & Trust Company
                           6201 15th Avenue
                           Brooklyn, New York 11214

(or if given such other method as the Company shall deem  appropriate).  Notices
or demands  authorized  by this  Agreement to be given or made by the Company or
the Rights Agent to the holder of any Right  Certificate  shall be  sufficiently
given or made if sent by first-class  mail,  postage prepaid,  addressed to such
holder  at the  address  of such  holder as shown on the  registry  books of the
Rights  Agent  (or if  given  such  other  method  as  the  Company  shall  deem
appropriate).

                  Section  26.   SUPPLEMENTS  AND   AMENDMENTS.   Prior  to  the
Distribution  Date, the Board of Directors of the Company (with the  concurrence
of a majority of the  Continuing  Directors)  may, and the Rights Agent shall if
the Company so directs,  supplement  or amend any  provision  of this  Agreement
without the approval of any holders of certificates  representing Common Shares.
From and after the Distribution Date and subject to the penultimate  sentence of
this  Section 26, the Company and the Rights Agent may at any time and from time
to time  supplement or amend this Agreement  without the approval of any holders
of Rights solely in order to cure any  ambiguity,  to correct or supplement  any
provision contained herein which may be defective or inconsistent with any other
provisions  herein,  to shorten or lengthen any time period hereunder or to make
any other provisions in regard to matters or questions  arising  hereunder which
the Company and the Rights Agent may deem necessary or desirable and which shall
not  adversely  affect the  interests  of the  holders of Rights  (other than an
Acquiring Person or an Affiliate or Associate of an Acquiring Person),  as such;
provided,  however,  that this Agreement may not be  supplemented  or amended to
lengthen a time period  relating to when the Rights may be redeemed at such time
as the  Rights are not then  redeemable  or any other time  period  unless  such
lengthening is for the purpose of protecting, enhancing or clarifying the rights
of,  and/or the  benefits  to, the  holders of Rights.  Upon the  delivery  of a
certificate  from an  appropriate  officer of the Company  which states that the
proposed supplement or amendment is in compliance with the terms of this Section
26, the Rights Agent shall execute such supplement or amendment. Notwithstanding
anything contained in this Agreement to the contrary, no supplement or amendment
shall be made which  changes the  Redemption  Price,  the Purchase  Price or the
number of Common  Shares for which a Right is  exercisable;  provided,  however,
that between April 15, 2001 and September 30, 2001 the Board of Directors  shall
review the other provisions of this Agreement,  including without limitation the
Final Expiration  Date, to determine what  amendments,  if any, are necessary or
appropriate to effectuate  better the purposes of this  Agreement;  and provided
further, however, that at any time prior to (i) a Share Acquisition Date or (ii)
the date that a tender or exchange  offer by any Person (other than the Company,
any Subsidiary of the Company,  any employee  benefit plan of the Company or any
Subsidiary  of the  Company,  or any Person or entity  organized,  appointed  or
established  by the  Company  for or  pursuant to the terms of any such plan) is
first  published  or sent or given  within the  meaning of Rule  14d-2(a) of the
General  Rules and  Regulations  under  the  Exchange  Act if upon  consummation
thereof such Person would be the  Beneficial  Owner of 20% or more of the Common
Shares then  outstanding,  the Board of  Directors of the Company may amend this
Agreement to increase the Purchase  Price or extend the Final  Expiration  Date.
Prior to the Distribution  Date, the interests of the holders of Rights shall be
deemed coincident with the interests of the holders of Common Stock.

                  Section 27.  SUCCESSORS.  All the covenants and  provisions of
this  Agreement  by or for the benefit of the Company or the Rights  Agent shall
bind and  inure  to the  benefit  of their  respective  successors  and  assigns
hereunder.  The Company  covenants and agrees that it shall not (i)  consolidate
with,  (ii) merge with or into,  or (iii)  sell or  transfer  to, in one or more
transactions, assets or earning power aggregating more than 50% of the assets or
earning  power of the  Company  and its  Subsidiaries,  taken  as a  whole,  any
Acquiring Person or its Affiliates or Associates if at the time of or after such
consolidation, merger or sale there would be any charter or by-law provisions or
any rights, options,  warrants or other instruments or securities outstanding or
agreements  in  effect or any other  actions  taken  which  would  eliminate  or
otherwise diminish the benefits intended to be afforded by the Rights.

                  Section 28. DETERMINATIONS AND ACTIONS BY THE DIRECTORS,  ETC.
For all  purposes of this  Agreement,  any  calculation  of the number of Common
Shares outstanding at any particular time, including for purposes of determining
the particular  percentage of such outstanding Common Shares of which any Person
is the Beneficial  Owner,  shall be made in accordance with the last sentence of
Rule 13d-3d(1)(i) of the General Rules and Regulations under the Exchange Act as
in effect  as of the date  hereof  and as  hereinafter  amended  but only to the
extent that any amendment  thereto does not diminish the rights of any holder of
the Rights  other than any  Acquiring  Person or an Affiliate or Associate of an
Acquiring  Person.   The  Board  of  Directors  of  the  Company  (with,   where
specifically  provided for herein, the concurrence of the Continuing  Directors)
shall have the exclusive power and authority to administer this Agreement and to
exercise all rights and powers specifically granted to the Board of Directors or
the Company,  or as may be necessary or advisable in the  administration of this
Agreement,  including,  without limitation, the right and power to (i) interpret
the  provisions  of this  Agreement,  and (ii)  make all  determinations  deemed
necessary or advisable for the  administration  of this  Agreement  (including a
determination to redeem or not redeem the Rights or to amend the Agreement). All
such actions,  calculations,  interpretations and determinations (including, for
purposes of clause (ii) below,  all  omissions  with  respect to the  foregoing)
which  are done or made by the  Directors  in good  faith  shall  (i) be  final,
conclusive  and binding on the  Company,  the Rights  Agent,  the holders of the
Rights  and all  other  parties,  and  (ii) not  subject  the  Directors  to any
liability to the holders of the Right Certificates.

                  Section  29.  BENEFITS  OF  THIS  AGREEMENT.  Nothing  in this
Agreement  shall be construed to give to any Person other than the Company,  the
Rights Agent and the registered holders of the Right Certificates (and, prior to
the Distribution  Date, the Common Shares) any legal or equitable right,  remedy
or claim  under this  Agreement;  but this  Agreement  shall be for the sole and
exclusive benefit of the Company, the Rights Agent and the registered holders of
the Right Certificates.

                  Section 30. ACTION BY DIRECTORS. Whenever any action hereunder
or in  connection  with the Rights is required or  permitted  to be taken by the
Board of  Directors of the  Company,  such action may be taken by the  Executive
Committee of the Board or by any other duly authorized  committee thereof (with,
where  specifically  provided  for herein,  the  concurrence  of the  Continuing
Directors).

                  Section 31. SEVERABILITY.  If any term, provision, covenant or
restriction  of this Agreement is held by a court of competent  jurisdiction  or
other  authority  to be invalid,  void or  unenforceable,  the  remainder of the
terms, provisions,  covenants and restrictions of this Agreement shall remain in
full force and effect and shall in no way be affected,  impaired or  invalidated
to  the  extent  such  terms,  provisions,  covenants  and  restrictions  do not
adversely affect the interests of the holders of Rights (other than an Acquiring
Person or an Affiliate or Associate of an Acquiring  Person),  as such.  Without
limiting the foregoing,  if any provision  requiring any action  hereunder to be
approved by a majority of Continuing Directors is held by any court of competent
jurisdiction  or other  authority  to be invalid,  void or  unenforceable,  such
determination  shall then be made by the Board of  Directors  of the  Company in
accordance  with applicable law and the Company's  Certificate of  Incorporation
and By-Laws.

                  Section  32.  GOVERNING  LAW.  This  Agreement  and each Right
Certificate  issued  hereunder  shall be deemed to be a contract  made under the
laws of the State of  Delaware  and for all  purposes  shall be  governed by and
construed in accordance  with the laws of such State  applicable to contracts to
be made and performed entirely within such State.

                  Section 33.  COUNTERPARTS.  This  Agreement may be executed in
any number of counterparts and each of such counterparts  shall for all purposes
be deemed to be an original, and all such counterparts shall together constitute
but one and the same instrument.

                  Section 34. DESCRIPTIVE HEADINGS.  Descriptive headings of the
several  Sections of this Agreement are inserted for convenience  only and shall
not  control or affect  the  meaning or  construction  of any of the  provisions
hereof.

                  IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this
Agreement  to be duly  executed  and  their  respective  corporate  seals  to be
hereunto affixed and attested, this 14th day of April, 1998.

                                    MEDCO RESEARCH, INC.

                                    By: /s/ Roger D. Blevins

                                    Name:  Roger D. Blevins

                                    Title: President and Chief
                                               Executive Officer


                                    AMERICAN STOCK TRANSFER &
                                      TRUST COMPANY

                                    By: /s/ Carolyn O'Neill

                                    Name: Carolyn O'Neill

                                    Title: Vice President


<PAGE>

                                    EXHIBIT A

                           [Form of Right Certificate]

Certificate No. R-                                           ____________ Rights

                  NOT  EXERCISABLE  AFTER APRIL 15, 2008 OR EARLIER IF REDEEMED.
                  THE RIGHTS ARE  SUBJECT  TO  REDEMPTION,  AT THE OPTION OF THE
                  COMPANY,  AT $.01 PER  RIGHT  ON THE  TERMS  SET  FORTH IN THE
                  RIGHTS AGREEMENT.  [THE RIGHTS REPRESENTED BY THIS CERTIFICATE
                  WERE ISSUED TO OR  ACQUIRED  BY A PERSON WHO WAS AN  ACQUIRING
                  PERSON OR AN AFFILIATE OR ASSOCIATE OF AN ACQUIRING PERSON (AS
                  SUCH TERMS ARE  DEFINED IN THE RIGHTS  AGREEMENT).  THIS RIGHT
                  CERTIFICATE AND THE RIGHTS  REPRESENTED HEREBY MAY BECOME VOID
                  IN THE CIRCUMSTANCES SPECIFIED IN SECTION 11(a)(ii) OR SECTION
                  11(d) OF THE RIGHTS AGREEMENT.]1

                                  Right Certificate

                       MEDCO RESEARCH, INC.

                  This certifies that , or registered assigns, is the registered
owner of the number of Rights set forth above,  each of which entitles the owner
thereof, subject to the terms, provisions and conditions of the Rights Agreement
dated as of April 14, 1998 (the  "Rights  Agreement")  between  Medco  Research,
Inc., a Delaware  corporation  (the  "Company"),  and American  Stock Transfer &
Trust  Company (the "Rights  Agent"),  to purchase  from the Company at any time
after the  Distribution  Date (as such term is defined in the Rights  Agreement)
and prior to 5:00 P.M.  (New York City time) on April 14, 2008 at the  principal
office of the Rights Agent,  or its successors as Rights Agent, in New York, New
York, one-half of one fully paid nonassessable  Common Share,  without par value
(a "Common  Share")  of the  Company,  at a  purchase  price of $92.00 per whole
Common Share (the "Purchase  Price"),  upon  presentation  and surrender of this
Right  Certificate  with the Form of  Election to Purchase  duly  executed.  The
number of Rights  evidenced by this Right  Certificate (and the number of shares
which may be purchased upon exercise  thereof) set forth above, and the Purchase
Price set forth above,  are the number and Purchase  Price as of April 14, 2008,
based on the Common Shares as constituted on the close of business on such date.


- ----------
1    The portion of the legend in brackets  shall be inserted only if applicable
     and if the Company is able to identify the holder as an Acquiring Person or
     an Affiliate or Associate of an Acquiring Person.

                  As provided in the Rights  Agreement,  the Purchase  Price and
the number of Common  Shares  which may be  purchased  upon the  exercise of the
Rights  evidenced  by this Right  Certificate  are subject to  modification  and
adjustment upon the happening of certain events.

                  This  Right  Certificate  is  subject  to all  of  the  terms,
provisions and conditions of the Rights Agreement,  which terms,  provisions and
conditions  are hereby  incorporated  herein by reference and made a part hereof
and to which  reference  is hereby  made for a full  description  of the rights,
limitations  of rights,  obligations,  duties and  immunities  hereunder  of the
Rights Agent, the Company and the holders of the Right  Certificates.  Copies of
the Rights  Agreement  are on file at the  above-mentioned  office of the Rights
Agent.

                  This  Right   Certificate,   with  or  without   other   Right
Certificates,  upon surrender at the principal office of the Rights Agent in New
York,  New  York,  may be  exchanged  for  another  Right  Certificate  or Right
Certificates  of like tenor and date evidencing  Rights  entitling the holder to
purchase a like aggregate number of Common Shares as the Rights evidenced by the
Right  Certificate or Right  Certificates  surrendered  shall have entitled such
holder to purchase.  If this Right  Certificate  shall be exercised in part, the
holder  shall be  entitled  to  receive  upon  surrender  hereof  another  Right
Certificate or Right Certificates for the number of whole Rights not exercised.

                  Subject to the provisions of the Rights Agreement,  the Rights
evidenced  by this  Certificate  may be redeemed by the Company at a  redemption
price of $.01 per Right,  payable,  at the  election  of the  Company,  in cash,
Common Shares of the Company or such other consideration as may be determined by
the Directors of the Company.

                  No  fractional  Common Shares will be issued upon the exercise
of any Right or Rights  evidenced hereby (other than fractions which may, at the
election of the  Company,  be  evidenced by  depositary  receipts),  but in lieu
thereof a cash payment will be made, as provided in the Rights Agreement.

                  No holder of this Right  Certificate shall be entitled to vote
or  receive  dividends  or be deemed  for any  purpose  the holder of the Common
Shares  or of any  other  securities  of the  Company  which  may at any time be
issuable on the  exercise  hereof,  nor shall  anything  contained in the Rights
Agreement or herein be construed to confer upon the holder hereof,  as such, any
of the  rights  of a  shareholder  of the  Company  or any right to vote for the
election  of  directors  or upon any matter  submitted  to  shareholders  at any
meeting thereof, to give or withhold consent to any corporate action, to receive
notice of meetings or other actions affecting  shareholders  (except as provided
in the Rights  Agreement),  or to receive  dividends or subscription  rights, or
otherwise,  until the Right or Rights evidenced by this Right  Certificate shall
have been exercised as provided in the Rights Agreement.

                  This Right  Certificate  shall not be valid or obligatory  for
any purpose until it shall have been countersigned by the Rights Agent.

                  WITNESS the facsimile  signature of the proper officers of the
Company and its corporate seal. Dated as of ___________.


                                              MEDCO RESEARCH, INC.



Attest:_____________________                  By: _______________________

                                              Name:______________________

                                              Title:_____________________


                                              Countersigned:


                                              AMERICAN STOCK TRANSFER &
                                                TRUST COMPANY


                                              By: _______________________

                                              Name:______________________

                                              Title:_____________________



<PAGE>


                   [Form of Reverse Side of Right Certificate]

                               FORM OF ASSIGNMENT

                (To be executed by the registered holder if such
               holder desires to transfer the Right Certificates.)

                  FOR VALUE RECEIVED, ____________________ hereby sells, assigns
                  and transfers unto __________________________________________

                 (Please print name and address of transferee)
________________________________________________________________________________

this Right Certificate, together with all right, title and interest therein, and
does hereby irrevocably  constitute and appoint Attorney, to transfer the within
Right Certificate on the books of the within-named  Company,  with full power of
substitution.

Dated:______________

                                                   ---------------------------
                                                            Signature

Signature Guaranteed:



                                   Certificate

                  The undersigned  hereby  certifies by checking the appropriate
boxes that:

                  (1) This  Rights  Certificate  [ ] is [ ] is not  being  sold,
assigned and  transferred by or on behalf of a Person who is or was an Acquiring
Person or an Affiliate or Associate of any such Acquiring  Person (as such terms
are defined pursuant to the Rights Agreement); and

                  (2)  After  due  inquiry  and to  the  best  knowledge  of the
undersigned,  it [ ] did [ ] did not acquire the Rights evidenced by this Rights
Certificate  from any  Person who is, was or  subsequently  became an  Acquiring
Person or an Affiliate or Associate of an Acquiring Person.

Dated:______________

                                                   ---------------------------
                                                            Signature
Signature Guaranteed:


                                     NOTICE

                  The signature to the foregoing  Assignment  must correspond to
the name as written upon the face of this Right Certificate in every particular,
without alteration or enlargement or any change whatsoever.


<PAGE>


                          FORM OF ELECTION TO PURCHASE

                      (To be executed if holder desires to
                        exercise the Right Certificate.)

To Medco Research, Inc.:

                  The  undersigned   hereby   irrevocably   elects  to  exercise
______Rights represented by this Right Certificate to purchase the Common Shares
issuable  upon the exercise of such Rights and requests  that  certificates  for
such shares be issued in the name of:

- -------------------------------------------------------------------------------
                         (Please print name and address)

- -------------------------------------------------------------------------------

Social Security or other identifying number:

                  If such number of Rights shall not be all the Rights evidenced
by this Right Certificate,  a new Right Certificate for the balance remaining of
such Rights shall be registered in the name of and delivered to:

- ----------------------------------------------------------------
                         (Please print name and address)
- ----------------------------------------------------------------

Social Security or other identifying number:

Dated:______________


                                                   ---------------------------
                                                            Signature

Signature Guaranteed:





<PAGE>


                                   Certificate

                  The undersigned  hereby  certifies by checking the appropriate
boxes that:

                  (1) The Rights evidenced by this Rights  Certificate [ ] are [
] are not being exercised by or on behalf of a Person who is or was an Acquiring
Person or an Affiliate or Associate of any such Acquiring  Person (as such terms
are defined pursuant to the Rights Agreement); and

                  (2)  After  due  inquiry  and to  the  best  knowledge  of the
undersigned,  it [ ] did [ ] did not acquire the Rights evidenced by this Rights
Certificate  from any  Person who is, was or  subsequently  became an  Acquiring
Person or an Affiliate or Associate of an Acquiring Person.

Dated:____________________


                                                   ---------------------------
                                                            Signature
Signature Guaranteed:




                                     NOTICE

                  The  signature  to the  foregoing  Election  to  Purchase  and
Certificate  must  correspond to the name as written upon the face of this Right
Certificate in every particular, without alteration or enlargement or any change
whatsoever.


<PAGE>

                                    EXHIBIT B

                              MEDCO RESEARCH, INC.
                            STOCKHOLDERS RIGHTS PLAN

                          SUMMARY OF RIGHTS TO PURCHASE
                                  COMMON SHARES

                  On April 2, 1998, the Directors of Medco  Research,  Inc. (the
"Company")  declared a dividend  distribution  of one right (a "Right") for each
outstanding  Common  Share,  without  par value (the  "Common  Shares"),  of the
Company.  The  distribution is payable on April 15, 1998 to the  shareholders of
record as of the close of business on April 14, 1998 (the "Record  Date").  Each
Right  initially  entitles the  registered  holder to purchase  from the Company
one-half of one Common  Share at a price of $92.00 per whole  share,  subject to
adjustment (the "Purchase  Price").  The description and terms of the Rights are
set  forth  in a  Rights  Agreement  dated as of April  14,  1998  (the  "Rights
Agreement")  between the Company and American Stock Transfer & Trust Company, as
Rights Agent (the "Rights Agent").

                  Until the earlier of (i) ten Business Days  following a public
announcement  that a person or group of  affiliated  or  associated  persons (an
"Acquiring Person") has acquired,  or obtained the right to acquire,  beneficial
ownership of 20% or more of the outstanding  Common Shares, or (ii) ten Business
Days following the  commencement  of a tender offer or exchange offer for 20% or
more of such outstanding  Common Shares (in each case without the prior approval
of the Board of Directors) (the earlier of such dates being  hereinafter  called
the "Distribution  Date"), the Rights will be evidenced,  with respect to any of
the Common Share certificates  outstanding as of the Record Date, by such Common
Share  certificate with a copy of this Summary of Rights attached  thereto.  The
Rights Agreement  provides that, until the Distribution Date, the Rights will be
transferred with and only with the Common Shares.  Until the  Distribution  Date
(or  earlier  redemption  or  expiration  of  the  Rights),   new  Common  Share
certificates  issued  after the Record  Date upon  transfer  or new  issuance of
Common  Shares will  contain a notation  incorporating  the Rights  Agreement by
reference.  Until the Distribution Date (or earlier  redemption or expiration of
the Rights),  the surrender for transfer of any  certificates  for Common Shares
outstanding as of the Record Date, even without a copy of this Summary of Rights
attached  thereto,  will also  constitute the transfer of the Rights  associated
with the Common Shares  represented by such certificate.  As soon as practicable
following  the  Distribution  Date (as  defined  above),  separate  certificates
evidencing  the Rights (the "Right  Certificates")  will be mailed to holders of
record of the Common Shares as of the close of business on the Distribution Date
and such separate Right Certificates alone will evidence the Rights.

                  The Rights are not exercisable  until the  Distribution  Date.
The Rights will expire on April 15, 2008, unless earlier redeemed by the Company
as described below.

                  The Purchase Price payable, and the number of Common Shares or
other securities or property  issuable,  upon exercise of the Rights are subject
to adjustment from time to time to prevent  dilution (i) in the event of a stock
dividend on, or a subdivision,  combination or  reclassification  of, the Common
Shares,  (ii) upon the grant to holders of the Common Shares of certain  rights,
options or warrants to subscribe for Common Shares or convertible  securities at
less than the  current  market  price of the  Common  Shares,  or (iii) upon the
distribution to holders of the Common Shares of evidences of indebtedness,  cash
(excluding  regular  periodic cash  dividends at a rate not in excess of 125% of
the rate of the last cash dividend  theretofore paid), assets, stock (other than
dividends  payable  in Common  Shares)  or of  subscription  rights,  options or
warrants (other than those referred to above).

                  In the event that an Acquiring  Person merges into the Company
and the  Company's  Common  Shares are not changed or  exchanged  or a person or
group of affiliated or associated  persons become the beneficial owner of 20% or
more of the Company's Common Shares, proper provision shall be made so that each
holder of a Right,  other than Rights that are or were beneficially owned by the
Acquiring  Person  after the date upon which the  Acquiring  Person  became such
(which  Rights  will  thereafter  be void),  will  thereafter  have the right to
receive upon exercise  thereof at the then current Purchase Price that number of
Common Shares having a market value of two times the Purchase  Price (or,  under
certain circumstances,  an amount of cash or other property or securities having
a value equal to the Purchase Price).  In the event that the Company is acquired
by an Acquiring Person in a merger or other business combination  transaction or
50% or more of its  assets  or  earning  power are sold to an  Acquiring  Person
(other than in a  transaction  approved by the Company's  shareholders),  proper
provision  shall be made so that each holder of a Right,  other than Rights that
are or were beneficially owned by the Acquiring Person after the date upon which
the Acquiring  Person became such (which Rights will thereafter be void),  shall
thereafter  have the right to  receive,  upon the  exercise  thereof at the then
current  Purchase  Price,  that  number  of Common  Shares  (or,  under  certain
circumstances,  an  economically  equivalent  security  or  securities)  of  the
surviving,  resulting or acquiring  person which at the time of such transaction
would have a market value of two times the  Purchase  Price (or,  under  certain
circumstances,  an amount of cash  equal to the  Purchase  Price).  The Board of
Directors of the Company may, at its option,  at any time after the later of the
Distribution Date and the first occurrence of a Triggering  Event,  exchange all
or part of the  then-outstanding and exercisable Rights (other than Rights owned
by an  Acquiring  Person) for Common  Shares at an exchange  ratio of one Common
Share per Right.

                  With certain  exceptions,  no adjustment in the Purchase Price
will be required until cumulative  adjustments require an adjustment of at least
1% in such  Purchase  Price.  No  fractional  shares will be issued  (other than
fractions which may, at the election of the Company,  be evidenced by depositary
receipts),  and in lieu  thereof  a payment  in cash  will be made  based on the
market  price of the Common  Shares on the last trading day prior to the date of
exercise.

                  The Company  may redeem the Rights in whole,  but not in part,
at a price of $0.01 per Right (the "Redemption  Price") at any time prior to the
later of (i) the Distribution Date and (ii) a public  announcement that a person
or group of affiliated or associated persons has acquired  beneficial  ownership
of 20% or more of the  outstanding  Common  Shares  (or such  later  date as the
Directors  may  specify)  and,  under  certain  circumstances,  upon a merger or
consolidation  of the  Company  with  or  into  a  corporation  which  is not an
Acquiring  Person.  At the election of the Company,  the Redemption Price may be
payable in cash, Common Shares, or such other consideration as the Company deems
appropriate.  Immediately  upon  the  action  of the  Directors  of the  Company
authorizing  redemption  of the Rights,  the right to  exercise  the Rights will
terminate  and the only right of the  holders of Rights  will be to receive  the
Redemption Price. The Company will give notice of such redemption to the holders
of the then  outstanding  Rights by mailing  such notice to all such  holders at
their last addresses as they appear on the Registry Books of the Rights Agent.

                  Until a Right is exercised,  the holder thereof, as such, will
have no rights as a shareholder of the Company,  including,  without limitation,
the right to vote or to receive dividends.

                  Prior to the Rights becoming exercisable, without the approval
of any holders of Rights, the Rights Agreement may be amended or supplemented by
the  Company  and the Rights  Agent in any manner  except  for an  amendment  or
supplement  which  would  change  the  Redemption  Price,  accelerate  the Final
Expiration Date, reduce the Purchase Price or change the number of Common Shares
for which a Right is then exercisable.  After the Distribution  Date, the Rights
Agreement  may be so  amended  or  supplemented  to cure  ambiguity,  correct or
supplement defective or inconsistent  provisions or otherwise as the Company and
the Rights Agent may deem necessary or desirable and shall not adversely  affect
the interests of the Rights holders.

                  A copy  of the  Rights  Agreement  is  being  filed  with  the
Securities and Exchange Commission as an Exhibit to a Registration  Statement on
Form 8-A. A copy of the Rights  Agreement is  available  free of charge from the
Company.  This summary description of the Rights does not purport to be complete
and is qualified in its entirety by reference to the Rights Agreement,  which is
hereby incorporated herein by reference.


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