BIOSITE DIAGNOSTICS INC
SC 13D, 1997-02-19
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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                     SECURITIES AND EXCHANGE COMMISSION
                           WASHINGTON, D.C. 20549
                     ___________________________________
                                SCHEDULE 13D
                               (RULE 13D-101)

                  UNDER THE SECURITIES EXCHANGE ACT OF 1934
                            (Amendment No.     )<1>

                      BIOSITE DIAGNOSTICS INCORPORATED
- --------------------------------------------------------------------------------
                              (Name of issuer)

                    COMMON STOCK, PAR VALUE $0.01 PER SHARE
     ----------------------------------------------------------------------     
                       (Title of class of securities)

                               09094510
     ----------------------------------------------------------------------     
                               (CUSIP number)

                            KLAUS H. JANDER, ESQ.
                               ROGERS & WELLS
                               200 PARK AVENUE
                          NEW YORK, NEW YORK 10166
                               (212) 878-8001
     ----------------------------------------------------------------------
                (Name, address and telephone number of person
              authorized to receive notices and communications)

                              FEBRUARY 10, 1997
     ----------------------------------------------------------------------
           (Date of event which requires filing of this statement)

               If  the  filing  person  has previously filed a statement on
     Schedule 13G to report the acquisition  which  is  the subject of this
     Schedule 13D, and is filing this schedule because of  Rule 13d-1(b)(3)
     or (4), check the following box  <square>.


               NOTE.  Six copies of this statement, including all exhibits,
     should  be  filed with the Commission.  SEE Rule 13d-1 (a)  for  other
     parties to whom copies are to be sent.

                       (Continued on following pages)

                             (Page 1 of 7 Pages)






__________________________


     <1> The remainder  of  this cover page shall be filled out for a reporting
person's initial filing on this  form  with  respect  to  the  subject class of
securities, and for any subsequent amendment containing information which would
alter disclosures provided in a prior cover page.

     The information required on the remainder of this cover page  shall not be
deemed  to be "filed" for the purpose of Section 18 of the Securities  Exchange
Act of 1934  or otherwise subject to the liabilities of that section of the Act
but shall be subject  to  all  other  provisions  of  the Act (however, SEE the
NOTES.)



PAGE
<PAGE>
                                             SCHEDULE 13D

                                                             PAGE 2 OF 7 PAGES


<TABLE>
<CAPTION>
<S>            <C>                              <C>         <C>                                       <C>
  1            NAME OF REPORTING PERSON
               S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                      Merck KGaA
                   (Reporting person is a foreign corporation and does not have S.S. or I.R.S. identification number)

  2            CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                                     (A) <square>
                                                                                                     (B) <square>
  3            SEC USE ONLY

  4            SOURCE OF FUNDS*

                      OO
  5            CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(C) OR 2(E)   <square>

  6            CITIZENSHIP OR PLACE OF ORGANIZATION

                      Federal Republic of Germany
                                                7           SOLE VOTING POWER

                                                                   1,187,667
         NUMBER OF
          SHARES
       BENEFICIALLY
         OWNED BY
           EACH
         REPORTING
          PERSON
           WITH
                                                8           SHARED VOTING POWER

                                                                   0
                                                9           SOLE DISPOSITIVE POWER

                                                                   1,187,667
                                               10           SHARED DISPOSITIVE POWER

                                                                   0
 11            AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON                              <square>

                      1,187,667
 12            CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*                    <square>
 13            PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                     APPROXIMATELY 10.5%
 14            TYPE OF REPORTING PERSON*

                      CO
</TABLE>


                                 *SEE INSTRUCTIONS BEFORE FILLING OUT!

                    INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
            (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.


PAGE
<PAGE>
ITEM 1.   SECURITY AND ISSUER
          -------------------

          This  statement  relates to the common stock, par value U.S.$0.01
(the  "Common  Stock")  of Biosite  Diagnostics  Incorporated,  a  Delaware
corporation (the "Issuer").  The address of the principal executive offices
of the Issuer is 11030 Roselle  Street,  San  Diego, California 92121.  The
Common  Stock  is  quoted on the Nasdaq National Market  under  the  symbol
"BSTE."

          The Issuer offered up to 2,300,000 shares of Common Stock to the
public in  an  initial  public  offering (the "IPO") commencing as soon as
practicable after the Effective Date (as defined below).  Prior to the IPO
and in  relation  thereto,  the Issuer filed Form S-1 (File No. 333-17657)
with the  Securities and  Exchange Commission on December 11, 1996   (the
"Registration Statement").    The  effective  date  of  the  Registration
Statement was February 10, 1997 (the "Effective Date").  Prior to the IPO,
there was no public market for the Common Stock.

ITEM 2.   IDENTITY AND BACKGROUND
          -----------------------

          The reporting person that is filing this statement is Merck KGaA,
a  German  corporation  with  general  partners.    E.   Merck,   a  German
partnership,  holds  approximately 75% of the stock of Merck KGaA, and  the
remaining stock is held  by  public  investors.   E.  Merck  is  the person
ultimately  in  control  of Merck KGaA.  The principal business purpose  of
Merck  KGaA  is the manufacture  and/or  distribution  of  pharmaceuticals,
chemicals and  laboratory  products.   The  principal  business  purpose of
E. Merck is to act as a holding company, holding approximately 75%  of  the
stock  of  Merck  KGaA.   The address of each of Merck KGaA and E. Merck is
Frankfurter Strasse 250, D-64293 Darmstadt, Federal Republic of Germany.

          The Issuer has entered  into  several strategic arrangements with
major pharmaceutical and diagnostic companies,  including  Merck  KGaA.  In
June  1994,  the  Issuer  entered  into  two agreements with Merck KGaA,  a
collaborative  development  agreement  and  a   supply   and   distribution
agreement,    in    connection    with    the   Issuer's   development   of
TRIAGE<reg-trade-mark> Cardiac, a product designed  for  the  detection  of
acute myocardial infarction.  (Merck KGaA has informed the Issuer, however,
that  Merck  KGaA  is  considering  assigning  its  rights  concerning  the
marketing of TRIAGE<reg-trade-mark> Cardiac either to a third party or back
to  the  Issuer.)  In addition, the Issuer uses Merck KGaA as the exclusive
distributor  in  certain  specified countries in Europe, Latin America, the
Middle East and Africa of the  Issuer's  TRIAGE<reg-trade-mark>  Panel  for
Drugs  of  Abuse,  a small self-contained test capable of detecting a broad
spectrum of commonly overdosed prescription and illicit drugs.

          The name,  business  address,  present  principal  occupation  or
employment and citizenship  of  the  executive  officers  and  directors of
Merck KGaA and E. Merck are set forth in Exhibits A and B, respectively.

          During  the last five years, Merck KGaA, E. Merck and each person
listed in Exhibits  A  and  B:  (i)  has  not  been convicted in a criminal
proceeding  and  (ii)  has  not  been a party to a civil  proceeding  of  a
judicial or administrative body of  competent  jurisdiction  as a result of

                                PAGE 3 OF 7 PAGES
PAGE
<PAGE>

which  it was or is subject to a judgment, decree or final order  enjoining
future violations  of,  or  prohibiting or mandating activities subject to,
federal or state securities laws  or finding any violations with respect to
such laws.

ITEM 3.   SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION
          -------------------------------------------------

          Immediately prior  to  the  IPO,  Merck KGaA  was  the beneficial
owner  of 1,041,667 shares of Common Stock, representing approximately 8.8%
of the  then issued  and outstanding shares  of Common Stock.   Merck  KGaA
obtained  these  shares of  Common Stock  as  the  result  of the automatic
conversion  of its Series E Preferred Stock  into  Common Stock in the IPO,
pursuant to the Stock Purchase Agreement,  dated  as of  November 25, 1992,
between the Issuer and Merck KGaA.  Other than the conversion of its Series
E Preferred Stock into Common Stock, Merck  KGaA  did  not  pay  any  other
consideration to acquire such 1,041,661 shares of Common Stock.

          In  the  course  of  the IPO, Merck KGaA acquired  an  additional
146,000 shares of Common Stock at  a  price  of  $12.00 per share directly
from  the  Issuer in  order to  maintain  an  approximate  10.5% ownership 
position  in  the Issuer.  The  source  of funds  for  this  purpose  was
internal working capital.

          As  of  the  closing  of the IPO and as of the date hereof, Merck
KGaA  was  the  beneficial  owner of  1,187,667  shares  of  Common  Stock,
representing approximately 10.5%  of the issued  and outstanding shares of
Common Stock.


ITEM 4.   PURPOSE OF TRANSACTION
          ----------------------

          Immediately prior  to  the IPO, Merck KGaA held 1,041,667 shares
of  Common Stock, and in the course  of  the  IPO,  Merck  KGaA acquired
an additional 146,000 shares of Common Stock, representing an aggregate of
approximately  10.5%  ownership  of the  Common Stock.  It is  the present
intention of Merck KGaA  to acquire  additional shares of Common Stock, if
necessary, perhaps on the open market, in order to maintain  an  ownership
position  of approximately  10.5%.  There  can be  no assurances, however,
that  Merck KGaA  will acquire  such  additional  shares  of Common Stock.
Merck KGaA intends to hold such shares of Common Stock for investment and
has no  plans  or proposals  relating  to the acquisition  of  additional
securities  of  the  Issuer  or  with  respect to material changes in the
Issuer's   business  or  corporate  structure,  including  those  matters 
enumerated  in  paragraphs  (a)  through  (j)  of Item 4 to Schedule 13D.


ITEM 5    INTEREST IN SECURITIES OF THE ISSUER
          ------------------------------------
          As  of the date of this filing, Merck KGaA owns 1,187,667  shares
of Common Stock,  representing  approximately  10.5% of the total issued and
outstanding shares of Common Stock.

                                PAGE 4 OF 7 PAGES
PAGE
<PAGE>

          Merck KGaA has the sole power to vote  or  direct  the  vote  and
disposition of such Common Stock.

          Other  than  the purchases described  in Item 4 above, no
transactions in the Common Stock  have been effected by Merck KGaA directly
or indirectly during the past 60 days.

          No  other  person has the right to receive or the power to direct
the receipt of dividends from, or the proceeds from the sale of, the Common
Stock.


ITEM 6    CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR
          RELATIONSHIP WITH RESPECT TO SECURITIES OF THE ISSUER
          -----------------------------------------------------

          After the IPO,  the  holders  of 6,870,513 shares of Common Stock
issued  upon the conversion of certain series  of  the  Issuer's  Preferred
Stock  (the  "Registrable  Shares")  or  their  permitted  transferees  are
entitled  to certain rights with respect to the registration of such shares
under the Securities  Act  of  1933, as amended (the "Securities Act").  If
the Issuer proposes to register  any of its securities under the Securities
Act,  either for its own account or  for  the  account  of  other  security
holders,  holders  of such Registrable Securities are entitled to notice of
such registration and  are  entitled  to  include  their Registrable Shares
therein,  provided, among other conditions, that the  underwriters  of  any
such offering have the right to limit the number of shares included in such
registration.   Additionally,  holders  of  the  1,458,334 shares of Common
Stock issued upon conversion of the Issuer's Series  E  Preferred Stock are
entitled  to  similar "piggy back" rights, on no more than  two  occasions,
commencing  two   years  after  the  Effective  Date  of  the  Registration
Statement.  In addition,  commencing  180  days  after  the Effective Date,
holders of at least 30% of the Registrable Shares may require the Issuer to
prepare and file a registration statement under the Securities  Act, at the
Issuer's  expense,  covering  at  least  30%  of  the  shares  entitled  to
registration  rights  and  with  an  offering  price  (net  of underwriting
discounts  and  commissions)  of  more  than $7,500,000, and the Issuer  is
required to use its best efforts to effect  such  registration,  subject to
certain conditions and limitations.  The Issuer is not obligated to  effect
more  than  two  of  these  stockholder-initiated  registrations.  Further,
holders of Registrable Shares may require the Company  to  file  additional
registration  statements  with  the  Securities and Exchange Commission  on
Form S-3, subject to certain conditions and limitations.

          Merck KGaA is the beneficial  owner  of  certain such Registrable
Securities, including 1,041,667 shares of Common Stock  acquired  by  Merck
KGaA  as  the  result of the automatic conversion of its Series E Preferred
Stock into Common  Stock  in  the  IPO,  pursuant  to  the  Stock  Purchase
Agreement, dated as of November 25, 1992, between the Issuer and Merck KGaA
concerning Series E Preferred Stock.

                                PAGE 5 OF 7 PAGES

PAGE
<PAGE>
ITEM 7    MATERIALS TO BE FILED AS EXHIBITS
          ---------------------------------

Exhibit A: Executive Officers and Directors of Merck KGaA.
Exhibit B: Executive Officers and Directors of E. Merck.
Exhibit C: Stock Purchase Agreement, dated November 25, 1992, between the
           Issuer  and  Merck KGaA  (incorporated by reference to Exhibit
	   10.18  to  the Issuer's  Registration  Statement  on  Form S-1
	   (File No. 333-1757)).


                                PAGE 6 OF 7 PAGES

PAGE
<PAGE>
                             SIGNATURE

          After  reasonable  inquiry  and  to  the best of my knowledge and
belief, I certify that the information set forth in this statement is true,
complete and correct.



                              Date:  February 14, 1997




                              MERCK KGaA

                              By: \s\ Klaus-Peter Brandis
			      ---------------------------	
                              Name:  Klaus-Peter Brandis
                              Title: Director

                              By: \s\ Wilfried Neumann
			      ---------------------------	
                              Name:  Wilfried Neumann
                              Title: Senior Manager

PAGE
<PAGE>
                             EXHIBIT A
          EXECUTIVE OFFICERS AND DIRECTORS OF MERCK KGAA

EXECUTIVE BOARD (GESCHAFTSLEITUNG)
- -------------------------------------

Name:        Klaus Gruber
Address:     Rosengartenstrasse 26
             64665 Alsbach-Hahnlein
             Federal Republic of Germany
Occupation:  Merchant
Citizenship: Germany

Name:        Wolfgang Honn
Address:     Am Dahrsberg 9
             64342 Seeheim-Jugenheim
             Federal Republic of Germany
Occupation:  Merchant
Citizenship: Germany

Name:        Prof. Dr. Hans-Joachim Langmann
Address:     Merckstrasse 40
             64342 Seeheim-Jugenheim
             Federal Republic of Germany
Occupation:  Physicist
Citizenship: Germany

Name:        Edward H. Roberts
Address:     Margeritenstrasse 11
             63322 Rodermark
             Federal Republic of Germany
Occupation:  Pharmacist
Citizenship: United Kingdom

Name:        Dr. Michael Romer
Address:     Niederwiesenring 129a
             63110 Rodgau
             Federal Republic of Germany
Occupation:  Chemist
Citizenship: Germany
<PAGE>
Name:        Dr. Thomas Schreckenbach
Address:     Prinzenbergweg 1
             63467 Muhltal
             Federal Republic of Germany
Occupation:  Chemist
Citizenship: Germany

Name:        Dr. Harald J. Schroder
Address:     Merck KGaA
             Frankfurter Strasse 250
             6100 Darmstadt
             Federal Republic of Germany
Occupation   Merchant
Citizenship: Germany


SUPERVISORY BOARD (AUFSICHTSRAT)
- --------------------------------
Name:        Jon Baumhauer
Address:     Merck KGaA
             Frankfurter Strasse 250
             6100 Darmstadt
             Federal Republic of Germany
Occupation   Psychologist
Citizenship: Germany

Name:        Prof. Dr. Christoph Clemm
Address:     Merck KGaA
             Frankfurter Strasse 250
             6100 Darmstadt
             Federal Republic of Germany
Occupation   Medical specialist
Citizenship: Germany

Name:        Dr. Heinrich Hornef
Address:     Merck KGaA
             Frankfurter Strasse 250
             6100 Darmstadt
             Federal Republic of Germany
Occupation   Retired
Citizenship: Germany
<PAGE>
Name:        Dr. Arend Oetker
Address:     Merck KGaA
             Frankfurter Strasse 250
             6100 Darmstadt
             Federal Republic of Germany
Occupation   Managing partner, Dr. Arend Oetker Holding GmbH & Co., Cologne
Citizenship: Germany

Name:        Dr. Gerhard Ziener
Address:     Merck KGaA
             Frankfurter Strasse 250
             6100 Darmstadt
             Federal Republic of Germany
Occupation   Chairman, Supervisory Board of Rohm Chemische Werke, Darmstadt
Citizenship: Germany

Name:        Peter Zuhlsdorff
Address:     Merck KGaA
             Frankfurter Strasse 250
             6100 Darmstadt
             Federal Republic of Germany
Occupation   Businessman, Darmstadt
Citizenship: Germany

Name:        Flavio Battisti
Address:     Merck KGaA
             Frankfurter Strasse 250
             6100 Darmstadt
             Federal Republic of Germany
Occupation   Chairman, works counsel of Merck KGaA
Citizenship: Germany

Name:        Manfred Bendel
Address:     Merck KGaA
             Frankfurter Strasse 250
             6100 Darmstadt
             Federal Republic of Germany
Occupation   Chairman, central works counsel of Merck KGaA
Citizenship: Germany
<PAGE>
Name:        Klaus Brauer
Address:     Merck KGaA
             Frankfurter Strasse 250
             6100 Darmstadt
             Federal Republic of Germany
Occupation   Head of education department, IG Chemie Papier Keramik
Citizenship: Germany

Name:        Brigitte Niems
Address:     Merck KGaA
             Frankfurter Strasse 250
             6100 Darmstadt
             Federal Republic of Germany
Occupation   Vice chairman, works counsel of Merck KGaA
Citizenship: Germany

Name:        Dr. Michael Kasper
Address:     Merck KGaA
             Frankfurter Strasse 250
             6100 Darmstadt
             Federal Republic of Germany
Occupation   Chairman, senior management counsel of Merck KGaA
Citizenship: Germany

Name:        Hans Schonhals
Address:     Merck KGaA
             Frankfurter Strasse 250
             6100 Darmstadt
             Federal Republic of Germany
Occupation   Businessman, Darmstadt
Citizenship: Germany

PAGE
<PAGE>
                             EXHIBIT B
           EXECUTIVE OFFICERS AND DIRECTORS OF E. MERCK


Name:        Prof. Dr. Hans-Joachim Langmann
Address:     Merckstrasse 40
             64342 Seeheim-Jugenheim
             Federal Republic of Germany
Occupation:  Physicist
Citizenship: Germany

Name:        Klaus Gruber
Address:     Rosengartenstrasse 26
             64665 Alsbach-Hahnlein
             Federal Republic of Germany
Occupation:  Merchant
Citizenship: Germany

Name:        Wolfgang Honn
Address:     Am Dahrsberg 9
             64342 Seeheim-Jugenheim
             Federal Republic of Germany
Occupation:  Merchant
Citizenship: Germany

Name:        Edward H. Roberts
Address:     Margeritenstrasse 11
             63322 Rodermark
             Federal Republic of Germany
Occupation:  Pharmacist
Citizenship: United Kingdom

Name:        Dr. Michael Romer
Address:     Niederwiesenring 129a
             63110 Rodgau
             Federal Republic of Germany
Occupation:  Chemist
Citizenship: Germany

Name:        Dr. Thomas Schreckenbach
Address:     Prinzenbergweg 1
             63467 Muhltal
             Federal Republic of Germany
Occupation:  Chemist
Citizenship: Germany

PAGE
<PAGE>
Name:        Dr. Harald J. Schroder
Address:     E. Merck
             Frankfurter Strasse 250
             6100 Darmstadt
             Federal Republic of Germany
Occupation   Merchant
Citizenship: Germany

<PAGE>


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