PALATIN TECHNOLOGIES INC
S-3, 1998-06-11
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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      As filed with the Securities and Exchange Commission on June 11, 1998

                                                      Registration No. 333-_____

================================================================================


                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

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



                                    FORM S-3

                             REGISTRATION STATEMENT

                                      UNDER

                           THE SECURITIES ACT OF 1933



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



                           PALATIN TECHNOLOGIES, INC.
             (Exact name of registrant as specified in its charter)


            DELAWARE                                     95-4078884
(State or other jurisdiction of             (I.R.S. Employer Identification No.)
 incorporation or organization)


                         214 CARNEGIE CENTER, SUITE 100
                               PRINCETON, NJ 08540
                                 (609) 520-1911
  (Address, including zip code, and telephone number, including area code, of
                    registrant's principal executive offices)


                                                          COPY TO:
EDWARD J. QUILTY, CHAIRMAN OF THE BOARD,               FAITH L. CHARLES
 PRESIDENT AND CHIEF EXECUTIVE OFFICER      RUBIN BAUM LEVIN CONSTANT & FRIEDMAN
    214 CARNEGIE CENTER, SUITE 100            30 ROCKEFELLER PLAZA, 29TH FLOOR
         PRINCETON, NJ 08540                         NEW YORK, NY 10112
            (609) 520-1911                             (212) 698-7700
(Name, address, including zip code, and
 telephone number, including area code, 
       of agent for service)

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


APPROXIMATE  DATE OF COMMENCEMENT  OF PROPOSED SALE TO THE PUBLIC:  from time to
time, following the effective date of this registration statement.



<PAGE>



If the only securities  being registered on this Form are being offered pursuant
to dividend or interest reinvestment plans, please check the following box. |_|

If any of the  securities  being  registered on this Form are to be offered on a
delayed or continuous  basis  pursuant to Rule 415 under the  Securities  Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. |X|

If this Form is filed to register additional securities for an offering pursuant
to Rule 462(b) under the Securities Act, please check the following box and list
the  Securities  Act  registration  statement  number of the  earlier  effective
registration statement for the same offering. |_|

If this Form is a  post-effective  amendment filed pursuant to Rule 462(c) under
the  Securities  Act,  check  the  following  box and  list the  Securities  Act
registration  statement number of the earlier effective  registration  statement
for the same offering. |_|

If delivery  of the  prospectus  is  expected  to be made  pursuant to Rule 434,
please check the following box. |_|

                         CALCULATION OF REGISTRATION FEE

<TABLE>
<CAPTION>
  Title of each
     class of                                 Proposed         Proposed maximum
 securities to be      Amount to be       maximum offering    aggregate offering      Amount of
    registered          registered      price per share (1)       price (1)       registration fee
 ----------------      ------------     -------------------   ------------------  ----------------
<S>                   <C>                     <C>                 <C>                 <C>      
Common Stock          686,362 Shares          $6.46875            $4,439,904          $1,309.77
</TABLE>

(1)     Estimated  solely for  purposes  of  calculating  the  registration  fee
        pursuant to Rule 457(c) under the  Securities  Act of 1933, and based on
        the average of the high and low prices of the registrant's  common stock
        reported on The Nasdaq SmallCap Market(sm) on June 8, 1998.

Also includes an indeterminate  number of shares of Common Stock that may become
issuable to prevent  dilution  resulting from stock splits,  stock dividends and
conversion price or exercise price  adjustments,  which are included pursuant to
Rule 416 under the Securities Act of 1933.

THE REGISTRANT HEREBY AMENDS THIS  REGISTRATION  STATEMENT ON SUCH DATE OR DATES
AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT  SHALL FILE
A FURTHER AMENDMENT WHICH SPECIFICALLY  STATES THAT THIS REGISTRATION  STATEMENT
SHALL  THEREAFTER  BECOME  EFFECTIVE  IN  ACCORDANCE  WITH  SECTION  8(A) OF THE
SECURITIES  ACT OF  1933  OR  UNTIL  THE  REGISTRATION  STATEMENT  SHALL  BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION,  ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.






<PAGE>



                   Subject to Completion, dated June 11, 1998

INFORMATION   CONTAINED  HEREIN  IS  SUBJECT  TO  COMPLETION  OR  AMENDMENT.   A
REGISTRATION  STATEMENT  RELATING  TO THESE  SECURITIES  HAS BEEN FILED WITH THE
SECURITIES  AND EXCHANGE  COMMISSION.  THESE  SECURITIES MAY NOT BE SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION  STATEMENT  BECOMES
EFFECTIVE.  THIS  PROSPECTUS  SHALL  NOT  CONSTITUTE  AN  OFFER  TO  SELL OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE  SECURITIES
IN ANY STATE IN WHICH SUCH OFFER,  SOLICITATION  OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.

PROSPECTUS

                               [GRAPHIC OMITTED]


                           PALATIN TECHNOLOGIES, INC.

                         686,362 SHARES OF COMMON STOCK

        This  Prospectus  relates  to the  offering  (the  "Offering")  of up to
686,362 shares (the "Registered Shares") of the common stock, $.01 par value per
share (the "Common Stock") of Palatin Technologies,  Inc. (the "Company"), which
may be  sold  from  time  to  time by the  selling  stockholders  named  in this
Prospectus   (each,   a   "Selling   Stockholder,"    together,   the   "Selling
Stockholders").  The  Registered  Shares consist of: (i) up to 343,180 shares of
Common Stock  issuable on conversion of 18,875 shares of the Company's  Series B
Convertible  Preferred  Stock,  $.01 par value per share  ("Series B Convertible
Preferred  Stock")  at the  current  conversion  price of  Series B  Convertible
Preferred  Stock;  and (ii) up to 343,182  shares of Common Stock  issuable upon
adjustment in the conversion price of Series B Convertible  Preferred Stock (the
"Contingent  Shares")  (see  "Description  of  Securities").  The  resale of the
Registered Shares is covered by this Prospectus.

        The  Common  Stock is  traded on The  Nasdaq  SmallCap  Market(sm)  (the
"Nasdaq SmallCap"), under the symbol "PLTN." No other security of the Company is
listed on any securities exchange or quoted in any  over-the-counter  market. On
June 8, 1998,  the last sale  price of Common  Stock as  reported  on the Nasdaq
SmallCap was $6.5625.

        Selling  Stockholders may, without  limitation or notice to the Company,
sell the  Registered  Shares from time to time directly to purchasers or through
underwriters,  brokers,  dealers  or agents,  on  securities  exchanges,  in the
over-the-counter market, and/or in privately negotiated transactions.  The price
of the Registered Shares to the public will,  therefore,  depend on the time and
nature of each sale.  The Company will receive no proceeds  from the sale of the
Registered Shares. Each Selling Stockholder will pay all underwriting  discounts
and selling  commissions  applicable  to the sale of such Selling  Stockholder's
Registered Shares.  Underwriting discounts and selling commissions will vary and
may or may not apply to any given  sale.  The  Company  will bear all  expenses,
estimated at $55,000,  relating to this  registration  of the Registered  Shares
including, without limitation,  registration and filing fees, printing expenses,
fees and expenses of counsel for the Company,  qualification or exemption of the
Registered  Shares  under state  securities  laws,  and up to $5,000 in fees and
expenses for one law firm acting as counsel to the Selling Stockholders.
See "Use of Proceeds" and "Plan of Distribution."


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


THE REGISTERED SHARES OFFERED HEREBY INVOLVE A HIGH DEGREE OF RISK.  SEE "RISK
FACTORS" BEGINNING ON PAGE 5 OF THIS PROSPECTUS.




<PAGE>



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


THESE  SECURITIES  HAVE NOT BEEN APPROVED OR  DISAPPROVED  BY THE SECURITIES AND
EXCHANGE  COMMISSION OR ANY STATE  SECURITIES  COMMISSION NOR HAS THE SECURITIES
AND  EXCHANGE  COMMISSION  OR ANY STATE  SECURITIES  COMMISSION  PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.


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




                 THE DATE OF THIS PROSPECTUS IS _______ __, 1998


<PAGE>

                    [INSIDE FRONT COVER PAGE OF PROSPECTUS ]
- --------------------------------------------------------------------------------

                              AVAILABLE INFORMATION

        The  Company  is  subject  to  the  informational  requirements  of  the
Securities   Exchange  Act  of  1934,  as  amended  (the  "Exchange  Act"),  and
accordingly  files  reports,  proxy  statements and other  information  with the
Securities and Exchange Commission (the "Commission").  All such reports,  proxy
statements  and other  information  may be  inspected  and  copied at the Public
Reference  Section  of the  Commission,  Room  1024,  450  Fifth  Street,  N.W.,
Washington D.C. 20549,  and at its Regional Offices at Seven World Trade Center,
13th Floor, New York, NY 10048, and at Northwest Atrium Center, 500 West Madison
Street, Suite 1400, Chicago, IL 60661-2511.  The Company is an electronic filer,
and the  Commission  maintains a Web site on the Internet at  http://www.sec.gov
that contains  reports,  proxy and information  statements and other information
regarding issuers that file electronically with the Commission. The Common Stock
is listed on the  Nasdaq  SmallCap,  and  reports,  proxy  statements  and other
information  concerning the Company may be inspected at the National Association
of Securities Dealers, Inc. at 1735 K Street, N.W., Washington D.C. 20006.

        This Prospectus  constitutes a part of a Registration  Statement on Form
S-3 filed by the Company with the  Commission  under the Securities Act of 1933,
as amended (the "Securities  Act") (together with all amendments,  schedules and
exhibits thereto, the "Registration  Statement").  This Prospectus omits certain
of the information  contained in the  Registration  Statement,  and reference is
hereby  made to the  Registration  Statement  and related  exhibits  for further
information with respect to the Company and the securities  offered hereby.  Any
statements  contained  herein  concerning the provisions of any document are not
necessarily  complete,  and, in each instance,  reference is made to the copy of
such  document  filed as an exhibit to the  Registration  Statement or otherwise
filed with the  Commission.  Each such statement is qualified in its entirety by
such reference.


                       DOCUMENTS INCORPORATED BY REFERENCE

        The following documents  previously filed with the Commission are hereby
incorporated by reference into this Prospectus:

        1.     The Company's Quarterly Report on Form 10-QSB for the nine months
               ended March 31,  1998,  as filed with the  Commission  on May 14,
               1998;

        2.     The  Company's  Report on Form 8-K dated April 28, 1998, as filed
               with the Commission on May 8, 1998;

        3.     The Company's  Quarterly Report on Form 10-QSB for the six months
               ended December 31, 1997, as filed with the Commission on February
               13, 1998;

        4.     The  Company's  Quarterly  Report  on Form  10-QSB  for the three
               months ended  September 30, 1997, as filed with the Commission on
               November 14, 1997;

        5.     The  Company's  Annual  Report on Form  10-KSB for the year ended
               June 30, 1997,  as filed with the  Commission  on  September  26,
               1997; and

        6.     The  description of the Common Stock of the Company  contained in
               its  Registration  Statement  under the  Exchange Act on Form 8-A
               filed on October 22, 1993.

        All  documents  subsequently  filed by the  Company  pursuant to Section
13(a),  13(c),  14 or 15(d) of the Exchange Act prior to the  termination of the
offering to which this Prospectus  relates shall be deemed to be incorporated by
reference into this  Prospectus and to be part of this  Prospectus from the date
of filing thereof.

        Any statement  contained in a document  incorporated by reference herein
shall be deemed to be modified or superseded for purposes of this Prospectus and
the Registration  Statement of which it is a part to the extent that a statement
contained  herein or in any other  subsequently  filed  document  which  also is
incorporated herein modifies

<PAGE>



or replaces such statement. Any statement so modified or superseded shall not be
deemed,  in its unmodified form, to constitute a part of this Prospectus or such
Registration Statement.

        The  Company  will  provide  without  charge  to each  person  to whom a
Prospectus is delivered,  upon written or oral request of such person, a copy of
any of the  information  that was  incorporated  by reference in this Prospectus
(not including  exhibits to the  information  that is  incorporated by reference
unless the exhibits are themselves specifically incorporated by reference).  The
address  and  telephone  number to which  such  request is to be  directed  are:
Stephen T. Wills,  Vice  President,  Palatin  Technologies,  Inc.,  214 Carnegie
Center, Suite 100, Princeton, NJ 08540, telephone (609) 520-1911.



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







<PAGE>


                                BUSINESS SUMMARY

        The  following  summary  should  be read  in  conjunction  with,  and is
qualified in its entirety by, the more  detailed  information,  including  "Risk
Factors,"  and  financial  statements  appearing  elsewhere or  incorporated  by
reference in this Prospectus.

        Certain  statements  in  this  Prospectus  constitute   "forward-looking
statements" within the meaning of the Private  Securities  Litigation Reform Act
of 1995.  Such  forward-looking  statements  involve  known and  unknown  risks,
uncertainties and other factors which may cause the actual results,  performance
or achievements of the Company, or industry results, to be materially  different
from any future results,  performance,  or achievements  expressed or implied by
such  forward-looking  statements.  Such  factors  include,  among  others,  the
following:  delays in product  development;  problems  or delays  with  clinical
trials;  failure to receive or delays in receiving regulatory approval;  lack of
enforceability of patents and proprietary rights; lack of reimbursement; general
economic  and  business   conditions;   industry   capacity;   industry  trends;
competition;  material costs and  availability;  changes in business strategy or
development plans; quality of management;  availability, terms and deployment of
capital; business abilities and judgment of personnel; availability of qualified
personnel;  changes in, or the failure to comply with,  government  regulations;
and other factors  referenced in this Prospectus.  When used in this Prospectus,
statements  that are not  statements  of  historical  fact may be  deemed  to be
forward-looking   statements.   Without   limiting  the  foregoing,   the  words
"anticipates,"   "plans,"  "intends,"  "expects"  and  similar  expressions  are
intended to identify such forward-looking statements.  Readers are cautioned not
to place undue reliance on these forward-looking statements, which speak only as
of the date of this Prospectus. The Company undertakes no obligation to publicly
release the result of any revisions to these forward-looking statements that may
be made to reflect events or  circumstances  after the date hereof or to reflect
the occurrence of unanticipated events.

THE COMPANY

        The Company is a development-stage  biopharmaceutical  company dedicated
to developing  and  commercializing  products and  technologies  for  diagnostic
imaging and ethical drug development utilizing peptide,  monoclonal antibody and
radiopharmaceutical  technologies. The Company is concentrating on the following
products  and  technologies:  (i)  LeuTech(TM),  an infection  and  inflammation
imaging  product,  (ii) PT-14,  a peptide  hormone  product for the treatment of
sexual dysfunction,  and (iii) its patent-pending Metal Ion-induced  Distinctive
Array of Structures ("MIDAS(TM)") metallopeptide technology.

        The  Company  is  devoting  substantial  efforts  and  resources  to the
development of LeuTech,  which is the Company's first proposed  product to enter
Company-sponsored  clinical trials. The Company  anticipates seeking one or more
marketing partners for LeuTech prior to product approval. The Company intends to
devote substantial efforts and resources to the development of PT-14.

        The Company  believes  that the MIDAS  technology  represents a platform
technology which may enable the design and synthesis of novel peptide analogs or
mimics.  Further, the Company believes that its MIDAS technology may provide the
Company with the flexibility to generate its own  pharmaceutical  products,  and
the  ability  to  target  and  complement   existing   product   portfolios  and
technological  bases of other  companies.  The Company  intends to seek to enter
into  collaborative  arrangements  to assist in development,  manufacturing  and
marketing of certain  proposed  products  utilizing  the MIDAS  technology.  The
Company has  entered  into a license  option  agreement  as to certain  proposed
products based on MIDAS technology.

        The  Company  is at an  early  stage  of  development  and  has  not yet
completed  the  development  of any products.  Accordingly,  the Company has not
begun to market or generate revenues from the commercialization of any products.
It will be a number  of  years,  if ever,  before  the  Company  will  recognize
significant revenues from product sales or royalties. The Company's technologies
and products  under  development  will require  significant  time-consuming  and
costly research, development, pre-clinical studies, clinical testing, regulatory
approval and significant additional investment prior to their commercialization,
which may never occur. There can be no assurance that the Company's research and
development  programs  will be  successful,  that its products  will exhibit the
expected  biological results in humans, will prove to be safe and efficacious in
clinical  trials or will obtain the  required  regulatory  approvals or that the
Company or its  collaborators  will be successful in obtaining market acceptance
of any of the  Company's  products.  There can be no assurance  that the Company
will be successful in entering into strategic alliances or

                                        1

<PAGE>



collaborative  arrangements on commercially reasonable terms, if at all, or that
such arrangements will be successful, or that the parties with which the Company
will  establish   arrangements   will  perform  their   obligations  under  such
arrangements. The Company or its collaborators may encounter problems and delays
relating to research and development,  regulatory  approval,  manufacturing  and
marketing.  The failure by the Company to address successfully such problems and
delays  would have a material  adverse  effect on the Company.  In addition,  no
assurance  can be  given  that  proprietary  rights  of third  parties  will not
preclude the Company from marketing its proposed  products or that third parties
will not market superior or equivalent products.

PRODUCTS IN DEVELOPMENT

        LeuTech  Diagnostic  Imaging Product.  LeuTech, a proposed product under
development that utilizes the Company's direct  radiolabeling  technology,  is a
murine (or mouse) monoclonal  antibody-based product designed to be labeled with
the diagnostic  radioisotope  technetium-99m.  When labeled with technetium-99m,
LeuTech is intended to be used for diagnosis of  infections,  occult  abscesses,
sites of inflammatory disease and other conditions involving high concentrations
of white blood cells.

        The Company believes that LeuTech can be used for the rapid diagnosis of
a variety of  difficult  to diagnose  infections  and occult  abscesses.  Occult
abscesses are hidden infections that are generally characterized as being highly
localized.  Examples  of typical  occult  abscesses  include  infections  of the
intra-abdominal  area,  such as  intestinal,  spleen,  liver  or  urinary  tract
abscesses,  as well as  bone,  prosthetic  and  other  abscesses.  In a  typical
abscess, as in most infections, large numbers of white blood cells congregate at
the site of the  infection.  Thus,  if the location of  concentrations  of white
blood cells is known,  the site of the infection is also known. It is crucial in
the  diagnosis  and  treatment  of occult  abscesses  that the  location  of the
infection be  determined,  as location  will  frequently  determine  the type of
therapy which is appropriate.

        The most specific  procedure  currently  available for nuclear  medicine
imaging  of sites of  infection  involves  removal  of blood  from the  patient,
isolating white blood cells from the patient's  blood,  radiolabeling  the white
blood  cells and  injecting  the  radiolabeled  white  blood cells back into the
patient.  The  radiolabeled  white blood cells then  localize at the site of the
infection, and can be detected using nuclear medicine diagnostic equipment. This
procedure is expensive,  involves risks to patients and  technicians  associated
with blood handling, is difficult to perform and generally takes at least twelve
hours.

        LeuTech has been  formulated  as a  lyophilized,  or  freeze-dried,  kit
containing  the modified  antibody and reagents  required for the  radiolabeling
process.  Prior  to  use,  LeuTech  will be  labeled  with  technetium-99m  by a
radiopharmacy  or  by a  hospital's  nuclear  medicine  department.  LeuTech  is
designed to bind, in the body, to white blood cells already  present at the site
of the infection or circulating in the blood stream. Therefore, LeuTech does not
require handling or processing of patient blood.

        The  Company  has  submitted  an  Investigational  New Drug  Application
("IND") to the United  States Food and Drug  Administration  ("FDA") on LeuTech,
and has  completed  a Phase I clinical  trial of ten normal  volunteers  testing
safety of the drug and has completed  enrollment  for a Phase II clinical  trial
for  diagnosis  of  equivocal  appendicitis.  Additional  clinical  trials  were
conducted  under  an IND  submitted  to the  FDA  and  held  in the  name  of an
investigator,  using purified  antibody or kits provided by the Company.  Images
have been  obtained  in a variety of  diseases,  including  acute and  suspected
appendicitis,  pulmonary  infections  and other  abdominal  infections.  In some
cases,   diagnostic   images  have  been   obtained   within  five   minutes  of
administration  of  LeuTech,  and in all cases in which a  definitive  diagnosis
could be made, diagnostic images have been obtained within 90 minutes.

        The  Company  has  entered  into an  exclusive  royalty-bearing  license
agreement with The Wistar Institute of Anatomy and Biology ("Wistar  Institute")
to use the antibody  and cell line used for LeuTech for a defined  field of use.
Failure to meet the  performance  criteria  for any reason or any other event of
default  under the  license  agreement  leading to  termination  of the  license
agreement  with Wistar  Institute  would have a material  adverse  effect on the
Company.  While the Company has negotiated a long-term  contractual  arrangement
for the manufacture of the purified antibody necessary for LeuTech, there can be
no  assurance  that such  contractor  will be able to  successfully  manufacture
purified  antibody for LeuTech on a sustained  basis,  that such contractor will
remain in the  contract  manufacturing  business  for the time  required  by the
Company, or that the Company will be able to enter into such

                                        2

<PAGE>



contractual   arrangements  as  to  other  steps  and  components   required  to
manufacture  LeuTech. To date, the Company has only manufactured LeuTech in lots
preparatory to initiating  clinical  trial use, and has not  determined  whether
commercial  quantities  of LeuTech in  conformity  with these  standards  can be
manufactured on a sustained basis at an acceptable  cost. Such  manufacture must
be done under good manufacturing  practices ("GMP")  requirements  prescribed by
the FDA and  other  agencies.  Certain  steps  in the  manufacture  of  LeuTech,
including contract manufacture of purified antibody, vialing and lyophilization,
have been done under GMP.

        The Company  intends to complete Phase III clinical trials in early 1999
and file regulatory applications to market thereafter. There can be no assurance
that the Company's LeuTech development program will be successful,  that the FDA
will permit the Company's  clinical  trials to proceed as planned,  that LeuTech
will prove to be safe and  efficacious in clinical  trials,  that LeuTech can be
manufactured  in  commercially  required  quantities on a sustained  basis at an
acceptable price, that LeuTech will obtain the required regulatory  approvals or
that the Company or its  collaborators  will be successful  in obtaining  market
acceptance of LeuTech.  The Company or its collaborators may encounter  problems
and  delays  relating  to  research  and   development,   regulatory   approval,
manufacturing and marketing of LeuTech.

        PT-14 Male Erectile  Dysfunction  Product.  PT-14, a stabilized  peptide
analog of the natural hormone  alpha-MSH,  is a proposed product being developed
by the Company for the treatment of male erectile dysfunction ("MED").  PT-14 is
believed  to  activate  specific  receptors  found in the  brain,  resulting  in
stimulation of normal sexual arousal. This mechanism of action is believed to be
different than that of other products currently being marketed for the treatment
of MED. In addition  to its  potential  use for  treatment  of MED,  the Company
believes   PT-14  may  also  be  useful  for  the  treatment  of  female  sexual
dysfunction.

        In a recent  study,  the National  Institutes of Health  estimated  that
greater than 20,000,000 men in the United States may be afflicted with some form
of MED.  Because of the large number of men  believed to be afflicted  with MED,
the market for  treatment of MED is believed to be in excess of several  billion
dollars per year.  There is tremendous  competition  to develop and market drugs
for treatment of MED.

        Limited  clinical  trials  were  conducted  using  PT-14  under  an  IND
submitted to the FDA and held in the name of an  investigator  at the University
of Arizona.  In a  double-blind  clinical  trial,  eight out of ten men achieved
clinically significant erectile response on administration of PT-14.

        PT-14 is currently administered as a non-penile  subcutaneous injection.
The Company has initiated development efforts on an oral delivery formulation of
PT-14,  and has entered into an agreement with  TheraTech,  Inc.  ("TheraTech"),
including a license to certain  patents owned by TheraTech,  to  collaboratively
develop  an  oral  transmucosal  delivery  system  for  PT-14.  There  can be no
assurance  that the Company and TheraTech  will be able to develop an acceptable
oral  transmucosal  delivery system for PT-14, or any alternative  oral delivery
system,  in any reasonable  period of time or at acceptable costs, if at all. If
an acceptable delivery system is developed, failure to meet performance criteria
or any other event of default under the license agreement leading to termination
of the license with TheraTech may have a material adverse effect on the Company.

        The  Company  has  entered  into an  exclusive  royalty-bearing  license
agreement with Competitive  Technologies,  Inc. ("Competitive  Technologies") to
develop  and market  PT-14.  Failure to meet the  performance  criteria  for any
reason or any other  event of default  under the  license  agreement  leading to
termination of the license  agreement with  Competitive  Technologies may have a
material adverse effect on the Company.

        There can be no assurance that the Company's PT-14  development  program
will be successful, that PT-14 will prove to be safe and efficacious in clinical
trials, or that PT-14 will obtain required regulatory approvals. There can be no
assurance  that,  even if the  Company is  successful  in  receiving  FDA market
approval  for  PT-14,  the  Company  or  its  collaborators   will  be  able  to
successfully  compete  in the  MED  market.  In  addition,  the  Company  or its
collaborators  may  encounter  problems  and delays  relating  to  research  and
development, regulatory approval, manufacturing and marketing of PT-14.

        Research on Other Products.  The Company is engaged in limited  research
and  development  work on other  products,  including  PT-5,  a  rhenium-labeled
somatostatin peptide analog intended to treat cancers by regional delivery

                                        3

<PAGE>



of tumor  cell-targeted  radiotherapy.  PT-5  binds to  somatostatin  receptors.
Somatostatin  is a natural  peptide  hormone  involved in the regulation of cell
growth and differentiation,  and somatostatin  receptors are over-expressed on a
wide  variety of cancers.  PT-5 is intended to target such cancers and deliver a
therapeutic  dose of  rhenium-188,  a radioisotope  which emits high energy beta
radiation,  to the  cancer.  The  Company is  working  with  researchers  at the
University  of Bonn in Germany,  and has initiated  clinical  trials of patients
with bronchial cancer metastatic to the pleural cavity.  This trial is primarily
designed to obtain  safety and dose response  data,  and  secondarily  to obtain
evidence of efficacy,  including  tumor stasis or regression and  improvement in
cancer-associated  biological  markers.  No prediction can be made as to when or
whether the PT-5 research  project,  or other research  projects of the Company,
will lead to commercial products

MIDAS TECHNOLOGY

        Role and  Function of Peptides.  Peptides,  short chains of amino acids,
play important  roles in regulating a variety of biological  functions.  Natural
peptides  function by  conforming  or bending to fit specific  molecules on cell
surfaces, called receptors,  thereby signaling the cell to initiate a biological
activity.  Some important  biological functions that are affected in this manner
include overall growth and behavior,  inflammatory  responses,  immune responses
and wound healing.

        In order to effectively regulate cell signaling,  a peptide must bind to
its target receptor with high affinity. The affinity of a peptide for its target
receptor is highly  dependent on its  three-dimensional  shape or  conformation.
Many  naturally  occurring  peptides  are  flexible  and can  take  on  multiple
conformations,  allowing  them to  interact  with  more  than  one  type of cell
receptor,  and to control multiple functions within the body. However, when such
peptides are used as drugs, this multiple reactivity is a disadvantage as it may
lead to side effects. The ability to construct high-affinity,  receptor-specific
peptides  offers a significant  opportunity to develop potent  receptor-specific
drugs.

        Introduction  to  MIDAS  Technology.   The  Company  believes  that  its
patent-pending  MIDAS  technology  can be used to rationally  design and produce
receptor-specific drugs. Using MIDAS, highly stable metallopeptide complexes are
formed,  in which the metal ion locks or constrains  the peptide into a specific
conformation. By designing MIDAS peptides to mimic the conformation required for
a specific receptor,  a stable,  receptor-specific  drug, with high affinity and
enhanced biological activity, can be made.  Radiopharmaceutical  products, which
may be diagnostic or therapeutic,  may be developed using radioactive metal ions
in MIDAS peptides.  Non-radioactive metal ions may be used in the development of
biopharmaceutical MIDAS peptides.

        The  Company is  engaged  in  research  and  development  on a number of
product  opportunities for its MIDAS  technology,  including use as an infection
imaging agent and therapeutic agent for eating  disorders.  No prediction can be
made,  however, as to when or whether the areas in which there are ongoing MIDAS
technology research projects will yield scientific discoveries,  or whether such
research projects will lead to commercial products

        Other  Potential  Opportunities.  The Company is  evaluating a number of
product  opportunities  for  its  MIDAS  technology,   and  believes  that  this
technology may have medical applications in a variety of areas, including immune
disorders,  cancers and  cardiology.  The Company intends to expand research and
development  of  MIDAS  technology   applications  primarily  through  strategic
alliances  with  other  entities.  No  assurances  can  be  made  regarding  the
establishment or the timing of such alliances, and the failure to establish such
alliances on a timely basis could limit the  Company's  ability to develop MIDAS
technology and could have a material adverse effect on the Company.  The Company
intends  to  devote  resources  to  expand  research  and  development  of MIDAS
technology to the extent funding is available.

        Option  Agreement with Nihon.  The Company entered into a License Option
Agreement (the "Option  Agreement") with Nihon  Medi-Physics Ltd.  ("Nihon"),  a
Japanese developer and manufacturer of  radiopharmaceutical  drugs, and received
an initial payment of $1,000,000 before Japanese  withholding taxes of $100,000.
Pursuant to the Option Agreement (i) Nihon has an option to exclusively  license
certain jointly developed  radiopharmaceutical  diagnostic products based on the
Company's  MIDAS  technology  and (ii) Nihon can  maintain  its option by making
certain milestone payments based on progress in product  development.  Nihon may
exercise its right to negotiate a license  agreement at any time upon notice and
payment of  additional  monies to the Company.  There can be no  assurance  that
future payments provided for in the Option Agreement will be made, that the

                                        4

<PAGE>


Company and Nihon will ever enter into a definitive license agreement, or that a
definitive  strategic  alliance between the Company and Nihon will result in the
development or  commercialization  of any product. In the event that Nihon gives
notice of its right to  negotiate a license  agreement,  and the parties  cannot
agree on terms of such license  agreement,  the Company may be required to repay
$550,000 to Nihon.  Failure to enter into a  definitive  license  agreement,  or
being  required to repay certain  monies to Nihon,  may have a material  adverse
effect on the Company.

EXECUTIVE OFFICES

        The  address of the  Company's  principal  executive  offices is Palatin
Technologies, Inc., 214 Carnegie Center, Suite 100, Princeton, NJ 08540, and the
telephone number is (609) 520-1911.


                                  RISK FACTORS

AN INVESTMENT IN THE REGISTERED SHARES IS HIGHLY SPECULATIVE IN NATURE, INVOLVES
A HIGH DEGREE OF RISK AND SHOULD NOT BE PURCHASED BY PERSONS WHO CANNOT AFFORD A
LOSS OF THEIR ENTIRE  INVESTMENT.  EACH  PROSPECTIVE  INVESTOR  SHOULD  CONSIDER
CAREFULLY THE RISKS  INHERENT IN AND AFFECTING  BOTH THE BUSINESS OF THE COMPANY
AND THE VALUE OF THE COMMON STOCK AND  SPECULATIVE  FACTORS  INCLUDING,  WITHOUT
LIMITATION,  THE FOLLOWING RISK FACTORS, AS WELL AS OTHER INFORMATION  CONTAINED
ELSEWHERE IN THIS PROSPECTUS, BEFORE MAKING AN INVESTMENT DECISION.

        EARLY  STAGE  OF  DEVELOPMENT;   UNCERTAINTY  OF  PRODUCT   DEVELOPMENT;
TECHNOLOGICAL  UNCERTAINTY.  The Company is at an early stage of development and
has not yet completed the development of any products.  Accordingly, the Company
has not begun to market or generate revenues from the  commercialization  of any
products.  It will be a number  of  years,  if ever,  before  the  Company  will
recognize  significant  revenues from product sales or royalties.  The Company's
technologies   and  products   under   development   will  require   significant
time-consuming and costly research,  development,  preclinical studies, clinical
testing,  regulatory  approval and significant  additional  investment  prior to
their  commercialization,  which may never occur. There can be no assurance that
the Company's  research and  development  programs will be successful,  that its
products  will  exhibit  the  expected  biological  results in humans,  that its
products  will prove to be safe and  efficacious,  that its products will obtain
the  required  regulatory  approvals,  demonstrate  substantial  therapeutic  or
diagnostic benefit, be commercialized on a timely basis, experience no design or
manufacturing  problems,  be  manufactured on a large scale, or be economical to
market, or that the Company or its collaborators will be successful in obtaining
market  acceptance  of any of the  Company's  products  or  generate  sufficient
revenue to support research and development programs.  There can be no assurance
that the Company will be  successful  in entering  into  strategic  alliances or
collaborative  arrangements  on commercially  reasonable  terms, if at all, that
such arrangements will be successful, or that the parties with which the Company
will  establish   arrangements   will  perform  their   obligations  under  such
arrangements. The Company or its collaborators may encounter problems and delays
relating to research and development,  regulatory  approval,  manufacturing  and
marketing.  The failure by the Company to successfully address such problems and
delays  would have a material  adverse  effect on the Company.  In addition,  no
assurance  can be  given  that  proprietary  rights  of third  parties  will not
preclude the Company from marketing its proposed  products or that third parties
will not market superior or equivalent products.

        HISTORY OF OPERATING  LOSSES AND  ACCUMULATED  DEFICIT.  The Company has
incurred net operating losses since its inception  (January 28, 1986) and, as of
March 31, 1998, had an accumulated deficit of approximately $20.0 million, which
has increased to date. The Company anticipates  incurring additional losses over
at least the next several  years and such losses are expected to increase as the
Company  expands  manufacturing  efforts  and  clinical  trials  on its  LeuTech
product,  initiates its PT-14  development  program and continues its efforts to
develop its MIDAS technology.  To achieve  profitability,  the Company, alone or
with others,  must successfully  develop its technologies and products,  conduct
preclinical studies and clinical trials,  obtain required  regulatory  approvals
and  successfully  manufacture,  introduce  and  market  such  technologies  and
products.  The time required to reach  profitability  is highly  uncertain,  and
there can be no assurance that the Company will be able to achieve profitability
on a sustained basis, if at all.

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<PAGE>


        NEED FOR  ADDITIONAL  FINANCING  AND ACCESS TO CAPITAL.  The Company has
incurred negative cash flow from operations since its inception. The Company has
expended,  and will continue to expend in the future, if available,  substantial
funds to continue its research and development  programs,  including preclinical
studies and clinical  trials,  to seek regulatory  approval of its products,  to
develop manufacturing and marketing capabilities, and to fund the growth that is
expected to occur if any of its proposed  products  are approved for  marketing.
Further,  the Company  has  significant  long-term  debt that is due and payable
through May 1999. The Company expects that its existing  capital  resources will
be adequate to make scheduled  debt payments and to fund its operations  through
September 1998. No assurance can be given that there will be no events affecting
the Company's  operations that would deplete available  resources  significantly
before such time.  The  Company's  future  capital  requirements  depend on many
factors,   including   continued   progress  in  its  research  and  development
activities,  progress with preclinical studies and clinical trials,  prosecuting
and enforcing patent claims, technological and market developments,  the ability
of the  Company  to  establish  product  development  arrangements,  the cost of
manufacturing  scale-up and effective marketing  activities and collaborative or
other  arrangements.  The Company will seek to obtain  additional  funds through
public or private financings, including equity or debt financings, collaborative
or other  arrangements  with  corporate  partners  and  others,  and from  other
sources.  No assurance can be given that additional  financing will be available
when  needed,  if at all, or on terms  acceptable  to the  Company.  If adequate
additional funds are not available,  the Company may be required to delay, scale
back or  eliminate  certain  of its  research  or  development  activities,  its
manufacturing and marketing efforts,  or require the Company to license to third
parties certain  products or technologies  that the Company would otherwise seek
to commercialize  itself.  If adequate funds are not available,  there will be a
material and adverse effect on the Company.

        POTENTIAL  VOLATILITY OF PRICE; LOW TRADING VOLUME.  The market price of
the   Common   Stock,   like  that  of  many  other   development-stage   public
pharmaceutical or biotechnology  companies,  has been highly volatile and may be
so in the future. Factors such as announcements of technological  innovations or
new commercial products by the Company or its competitors, disclosure of results
of preclinical and clinical testing, adverse reactions to products, governmental
regulation and approvals,  developments in patent or other  proprietary  rights,
public or regulatory  agency concerns as to the safety of products  developed by
the Company,  litigation  and general  market  conditions may have a significant
adverse effect on the market price of the Common Stock. In addition, in general,
the Common  Stock has been  thinly  traded,  which may affect the ability of the
Company's  stockholders to sell shares of the Common Stock in the public market.
There can be no assurance  that a more active trading market will develop in the
future.  Further,  the stock  market has from time to time  experienced  extreme
price and volume fluctuations that may be unrelated to the operating performance
of particular companies. Such fluctuations may adversely affect the price of the
Common Stock.

        PATENTS AND  PROPRIETARY  RIGHTS,  NO  ASSURANCE  OF  ENFORCEABILITY  OR
SIGNIFICANT COMPETITIVE ADVANTAGE. In general, the patent positions of companies
relying upon  biotechnology  are highly  uncertain and involve complex legal and
factual questions. To date, there has emerged no consistent policy regarding the
breadth of claims that are properly accorded to biotechnology patents. There can
be no assurance  that patents will issue from the patent  applications  filed by
the  Company or its  licensors  or that the scope of any  claims  granted in any
patent will provide meaningful proprietary protection or a competitive advantage
to the Company. There can be no assurance that the validity or enforceability of
patents  issued or licensed to the Company will not be  challenged by others or,
if challenged, will be upheld by a court. In addition, there can be no assurance
that  competitors  will not be able to circumvent any patents issued or licensed
to the Company.  In the United  States,  patent  applications  are maintained in
secrecy  until  they  issue as  patents,  and thus  publications  in the  patent
literature lag behind actual discoveries. Scientific publications also generally
appear  after a patent  application,  if any,  is filed.  As a result of delayed
publication, the Company cannot be certain that its scientists were the first to
make inventions covered by its patents and patent applications.

        In the event another party has also filed a patent application  relating
to an  invention  claimed in a Company  patent  application,  the Company may be
required to participate in an interference  proceeding adjudicated by the United
States  Patent and  Trademark  Office to determine  priority of  invention.  The
possibility  of  an   interference   proceeding   could  result  in  substantial
uncertainties  and  cost  for the  Company,  even  if the  eventual  outcome  is
favorable to the Company.  An adverse outcome could result in the Company losing
patent protection for the subject

                                        6

<PAGE>


of the  interference,  subject the Company to  significant  liabilities to third
parties and require the Company to obtain  license  rights from third parties at
undetermined cost or to cease using the technology.

        While no valid  patent that would be infringed  by  manufacture,  use or
sale  of the  Company's  proposed  products  has  come to the  attention  of the
Company, the Company's proposed products are still in the development stage, and
neither  their  formulations  nor their  method  of  manufacture  is  finalized.
Moreover,  patents  the  claims of which  would be  infringed  by the  Company's
commercial activities may not have issued as yet. There can thus be no assurance
that the manufacture,  use or sale of the Company's  proposed  products will not
infringe  patent  rights  of  others.   The  Company  may  be  unable  to  avoid
infringement  of any such  patents  and may have to seek a  license,  defend  an
infringement  action, or challenge the validity of such patents in court.  There
can be no assurance that a license will be available to the Company,  if at all,
upon terms and  conditions  acceptable  to the Company or that the Company  will
prevail  in  any  patent  litigation.  Patent  litigation  is  costly  and  time
consuming,  and there can be no assurance that the Company will have  sufficient
resources  to pursue such  litigation.  If the Company does not obtain a license
under any such patents, is found liable for infringement, or is not able to have
them declared invalid,  the Company may be liable for significant money damages,
may  encounter  significant  delays in bringing  products  to market,  or may be
precluded  from  participating  in the  manufacture,  use or sale of products or
methods of treatment covered by such patents.

        The Company relies  substantially in its product development  activities
on certain  technologies  which are neither  patentable nor  proprietary and are
therefore potentially available to the Company's  competitors.  The Company also
relies on certain  proprietary  technologies  (trade secrets and know-how) which
are not  patentable.  Although  the  Company  has  taken  steps to  protect  its
unpatented   trade   secrets  and   know-how,   in  part   through  the  use  of
confidentiality  agreements  with its employees,  consultants and certain of its
contractors,  there  can be no  assurance  that  these  agreements  will  not be
breached,  that the Company would have adequate  remedies for any breach or that
the Company's trade secrets will not otherwise  become known or be independently
developed or discovered by competitors.  If the Company's employees,  scientific
consultants or collaborators develop inventions or processes  independently that
may be applicable to the Company's product candidates,  disputes may arise about
ownership  of  proprietary  rights  to  those  inventions  and  processes.  Such
inventions and processes will not necessarily become the Company's property, but
may remain the  property of those  persons or their  employers.  Protracted  and
costly  litigation  could be necessary to enforce and determine the scope of the
Company's  proprietary  rights.  Failure to obtain or maintain  patent and trade
secret protection,  for any reason,  could have a material adverse effect on the
Company.

        Certain of the Company's  patents are directed to  inventions  developed
with  funds  from  United  States   government   agencies  or  within   academic
institutions from which the Company earlier acquired rights to such patents.  As
a result of these arrangements,  the United States government may have rights in
certain  inventions  developed during the course of the performance of federally
funded projects as required by law or agreements with the funding agency.

        Several bills affecting patent rights have been introduced in the United
States  Congress.  These bills address various aspects of patent law,  including
publication of pending  patent  applications,  modification  of the patent term,
re-examination, subject matter and enforceability. It is not certain whether any
of these bills will be enacted  into law and  whether,  as  enacted,  they would
affect  the  scope,  validity  and  enforceability  of  the  Company's  patents.
Accordingly,  the effect of  legislative  change on the  Company's  intellectual
property estate is uncertain.

        UNCERTAINTY OF  DEVELOPMENT OF LEUTECH.  The Company has entered into an
exclusive  royalty-bearing license agreement with Wistar Institute for a defined
field of use for the  antibody  and cell line used for  LeuTech,  which  license
agreement contains certain performance criteria and benchmark payments.  Failure
to meet the  performance  criteria  for any reason or any other event of default
under the license  agreement  leading to  termination  of the exclusive  license
agreement  with Wistar  Institute  would have a material  adverse  effect on the
Company.  While the Company has negotiated a long-term  contractual  arrangement
for the manufacture of the purified antibody necessary for LeuTech, there can be
no  assurance  that such  contractor  will be able to  successfully  manufacture
purified  antibody for LeuTech on a sustained  basis,  that such contractor will
remain in the  contract  manufacturing  business  for the time  required  by the
Company, or that the Company will be able to enter into such contractual

                                        7

<PAGE>

arrangements as to other steps and components  required to manufacture  LeuTech.
Such manufacture  must be done under GMP requirements  prescribed by the FDA and
other governmental  agencies. To date, the Company has only manufactured LeuTech
in lots preparatory to initiating clinical trial use, with certain manufacturing
processes having been done under GMP, and has not determined  whether commercial
quantities of LeuTech in conformity  with these standards can be manufactured on
a sustained basis at an acceptable cost.

        While the Company has filed an IND on LeuTech  with the FDA, and intends
to  complete  Phase  III  clinical  trials  in early  1999  and file  regulatory
applications to market with the FDA  thereafter,  there can be no assurance that
the Company's LeuTech development program will be successful,  that the FDA will
permit the Company's  clinical  trials to proceed as planned,  that LeuTech will
prove to be safe  and  efficacious  in  clinical  trials,  that  LeuTech  can be
manufactured  in  commercially  required  quantities on a sustained  basis at an
acceptable price, that LeuTech will obtain the required regulatory  approvals or
that the Company or its  collaborators  will be successful  in obtaining  market
acceptance of LeuTech.  The Company or its collaborators may encounter  problems
and  delays  relating  to  research  and   development,   regulatory   approval,
manufacturing  and marketing of LeuTech.  Failure to develop,  obtain regulatory
approval  for,  manufacture  and market  LeuTech on a timely  basis would have a
material adverse effect on the Company.

        UNCERTAINTY  OF  DEVELOPMENT  OF PT-14.  The Company has entered into an
exclusive  royalty-bearing  license  agreement with Competitive  Technologies to
develop  and market  PT-14.  Failure to meet the  performance  criteria  for any
reason or any other  event of default  under the  license  agreement  leading to
termination of the license  agreement with  Competitive  Technologies may have a
material  adverse  effect  on the  Company.  The  Company  has  entered  into an
agreement  with  TheraTech,  including  a license  to certain  patents  owned by
TheraTech,  to collaboratively  develop an oral transmucosal delivery system for
PT-14.  There can be no assurance that the Company and TheraTech will be able to
develop an  acceptable  oral  transmucosal  delivery  system  for PT-14,  or any
alternative  delivery system, in any reasonable period of time or for acceptable
costs, if at all.

        There can be no assurance that the Company's PT-14  development  program
will be successful, that PT-14 will prove to be safe and efficacious in clinical
trials, that PT-14 will obtain required regulatory approvals or that the Company
or its collaborators will be successful in obtaining market acceptance of PT-14.
In addition,  the Company or its collaborators may encounter problems and delays
relating to research and development,  regulatory  approval,  manufacturing  and
marketing of PT-14.

        UNCERTAINTY OF DEVELOPMENT OF MIDAS  TECHNOLOGY.  The Company is engaged
in research and development on a number of product  opportunities  for its MIDAS
technology,  including use as an infection imaging agent and a therapeutic agent
for eating  disorders,  and  believes  that MIDAS  technology  may have  medical
applications  in a variety of areas,  including  immune  disorders,  cancers and
cardiology.  The Company  intends to expand  research and  development  of MIDAS
technology   applications  primarily  through  strategic  alliances  with  other
entities. No assurances can be made regarding the establishment or the timing of
such  alliances,  and the failure to establish  such alliances on a timely basis
could limit the Company's  ability to develop MIDAS  technology and could have a
material adverse effect on the Company.  The Company expects to devote resources
to expand research and development of MIDAS  technology to the extent funding is
available.  No prediction can be made,  however, as to when or whether the areas
in which  there are  ongoing  MIDAS  technology  research  projects  will  yield
scientific  discoveries,   or  whether  such  research  projects  will  lead  to
commercial products.

        While the  Company  has entered  into the Option  Agreement  with Nihon,
pursuant to which Nihon has an option to exclusively  license  certain  products
based on the Company's MIDAS  technology,  there can be no assurance that future
payments provided for in the Option Agreement will be made, that the Company and
Nihon will ever enter into a definitive license agreement,  or that a definitive
strategic  alliance between the Company and Nihon will result in the development
or commercialization of any product. In the event that Nihon gives notice of its
right to negotiate a license agreement, and the parties cannot agree on terms of
such license agreement,  the Company will be required to repay certain monies to
Nihon.  Failure to enter into a definitive license agreement,  or being required
to repay  certain  monies to Nihon,  may have a material  adverse  effect on the
Company.

                                        8

<PAGE>

        GOVERNMENT  REGULATION;  NO  ASSURANCE  OF PRODUCT  APPROVAL.  Research,
development,  testing, clinical trials, manufacture,  distribution,  advertising
and marketing,  including distribution and sale, of pharmaceutical  products are
subject to extensive regulation by governmental authorities in the United States
and other  countries.  Prior to marketing,  proposed  products  developed by the
Company must undergo an extensive  regulatory  approval  process required by the
FDA and by comparable agencies in other countries.  This process, which includes
preclinical  studies and clinical  trials of each proposed  product to establish
safety  and  effectiveness  and  confirmation  by the FDA that good  laboratory,
clinical  and  manufacturing   practices  were  maintained  during  testing  and
manufacturing,  can take many years,  requires the  expenditure  of  substantial
resources  and  gives  larger  companies  with  greater  financial  resources  a
competitive  advantage  over the Company.  To date,  no proposed  product  being
evaluated by the Company has been  submitted for approval or approved by the FDA
or any other regulatory  authority for marketing,  and there can be no assurance
that any such product  will ever be submitted or approved for  marketing or that
the Company will be able to obtain the labeling claims desired for its products.
The  Company is and will  continue to be  dependent  upon the  laboratories  and
medical  institutions  conducting its preclinical studies and clinical trials to
maintain both good  laboratory and good clinical  practices.  Data obtained from
preclinical  studies and clinical trials are subject to varying  interpretations
which  could  delay,  limit  or  prevent  FDA  regulatory  approval.  Delays  or
rejections may be encountered based upon changes in FDA policy for drug approval
during the period of development and FDA regulatory review.  Similar delays also
may be encountered in foreign countries.

        There can be no assurance that FDA or other regulatory  approval for any
products  developed by the Company will be granted on a timely basis, if at all.
Delay  in  obtaining  or  failure  to  obtain  such  regulatory  approvals  will
materially adversely affect the introduction and marketing of any products which
may be developed by the Company as well as the Company's results of operations.

        When and if approvals are granted,  the Company,  the approved drug, the
manufacture of such drug and the  facilities in which such drug is  manufactured
are subject to ongoing  regulatory  review.  Subsequent  discovery of previously
unknown  problems may result in  restriction on a product's use or withdrawal of
the product from the market. Adverse government regulation that might arise from
future  legislative  or  administrative  action,  particularly  as it relates to
health care reform and product pricing, cannot be predicted.

        NO COMMERCIAL MANUFACTURING CAPABILITY OR EXPERIENCE.  To be successful,
the Company's  products must be manufactured in commercial  quantities under GMP
requirements  prescribed by the FDA and at acceptable costs. The Company has not
yet  manufactured  any  pharmaceutical  products in  commercial  quantities  and
currently does not have the facilities to manufacture any products in commercial
quantities  under  GMP.  In the event the  Company  determines  to  establish  a
manufacturing facility, it will require substantial additional funds, the hiring
and retention of significant  additional personnel and compliance with extensive
regulations  applicable  to such a facility.  The Company has no  experience  in
commercial pharmaceutical manufacturing,  and there can be no assurance that the
Company  will  be  able  to  establish  such a  facility  successfully  and,  if
established,  that  it  will  be able  to  manufacture  products  in  commercial
quantities for sale at competitive  prices. If the Company determines to rely on
collaborators,   licensees  or  contract   manufacturers   for  the   commercial
manufacture  of its  products,  the Company will be dependent on such  corporate
partners or other  entities for, and will have only limited  control  over,  the
commercial  manufacturing  of its  products.  While the Company has entered into
manufacturing  arrangements as to certain portions of the manufacture of LeuTech
under GMP, there can be no assurance that the contract manufacturer will perform
as agreed or will remain in the  contract  manufacturing  business  for the time
required by the  Company,  or that the  Company  will be able to enter into such
manufacturing  arrangements  as to  remaining  portions  of the  manufacture  of
LeuTech.  There can be no assurance  that the Company will be able to enter into
any  such  manufacturing  arrangements  as to its  other  proposed  products  on
acceptable terms, if at all.

        LIMITED CLINICAL TRIAL EXPERIENCE.  Before obtaining required regulatory
approvals for the  commercial  sale of its proposed  products,  the Company must
demonstrate  through clinical trials that such products are safe and efficacious
for use. The initiation and completion of clinical trials is dependent upon many
factors,  including FDA  acquiescence,  the  availability of qualified  clinical
investigators and access to suitable patient  populations.  Delays in initiating
and completing clinical trials may result in increased trial costs and delays in
FDA submissions,  which could have a material adverse effect on the Company.  To
date, the Company has limited experience in conducting

                                        9

<PAGE>

clinical trials.  The Company relies,  in part, on third parties for preparation
of  regulatory  filings  and the  design  of  clinical  trials.  There can be no
assurance  that the Company will be able to find  appropriate  third  parties to
provide services relating to clinical trials.

        A number of companies in the biotechnology and pharmaceutical industries
have  suffered  significant  setbacks in  clinical  trials,  even after  showing
promising  results in earlier studies or trials.  There can be no assurance that
the Company will not encounter  problems in its clinical  trials that will cause
the Company to delay or suspend its clinical trials, that the clinical trials of
its  proposed  products  will  be  completed  at all,  that  such  testing  will
ultimately  demonstrate the safety or efficacy of such proposed products or that
any proposed products will receive regulatory  approval on a timely basis, if at
all. If any such problems occur, there would be a material adverse effect on the
Company.

        LIMITED MARKETING,  DISTRIBUTION OR SALES CAPABILITY AND EXPERIENCE. The
Company has limited experience in marketing pharmaceutical  products,  including
distribution and selling of pharmaceutical  products, and will have to develop a
sales force and/or rely on  collaborators  or licensees or on arrangements  with
others to provide for the  marketing,  distribution,  and sales of its  proposed
products.  There can be no assurance  that the Company will be able to establish
marketing,  distribution and sales  capabilities or make arrangements with third
parties to perform such activities on acceptable terms,  which may result in the
lack of control by the Company over the marketing, distribution and sales of its
proposed  products.  In addition,  there can be no assurance that the Company or
any third party will be  successful in  marketing,  distributing  or selling any
products.  Furthermore,  the Company will compete with many other companies that
currently  have  extensive and  well-funded  marketing,  distribution  and sales
operations.

        COMPETITION.  The biopharmaceutical and  radiopharmaceutical  industries
are highly competitive. In the biopharmaceutical industry, there are a number of
companies developing peptide-based drugs, including companies exploring a number
of different  approaches to making  conformationally-constrained  short peptides
for use as therapeutic  drugs. In the  radiopharmaceutical  industry,  there are
several  companies  devoted to development and  commercialization  of monoclonal
antibody-based  products  and  peptide-based  products.  In the  development  of
products to treat MED, there are many companies  that are  commercializing  such
products or that have programs to develop  products to treat MED. The Company is
likely  to  encounter  significant  competition  with  respect  to its  proposed
products  currently  under  development.  Many  of  the  Company's  competitors,
including  those  developing  antibody-  and  peptide-based  radiopharmaceutical
products,  peptide-based  therapeutic products and products for the treatment of
MED,  have  substantially  greater  financial  and  technological  resources and
marketing   capabilities  than  the  Company,  and  have  significantly  greater
experience in research and development.  Accordingly,  the Company's competitors
may succeed in developing products and underlying technologies more rapidly than
the Company,  and in developing  products that are more effective and useful and
are less costly than any that may be developed  by the Company,  and may also be
more successful than the Company in  manufacturing  and marketing such products.
Academic  institutions,  hospitals,  governmental  agencies and other public and
private research  organizations are also conducting  research and seeking patent
protection and may develop  competing  products or  technologies on their own or
through collaborative arrangements.

        The   Company  is  aware  of  at  least  one   company   developing   an
antibody-based product which may compete with LeuTech as to certain indications,
which product is marketed in certain European countries and for which regulatory
approval is pending in the United  States.  The Company is also aware of another
company  developing a peptide-based  product which may also compete with LeuTech
as to  certain  indications.  The  Company is aware of at least  three  products
developed by other  companies  for the  treatment of MED that have  obtained FDA
marketing  approval,  and is aware of  additional  products  that are at a later
stage of development  than PT-14.  There can be no assurance  that,  even if the
Company is successful in receiving FDA market approval for PT-14, the Company or
its collaborators  will be able to successfully  compete in the MED market.  The
Company is also aware of a number of companies developing  technologies relating
to the use of peptides as drugs,  including a variety of different approaches to
making conformationally-constrained short peptides.

                                       10

<PAGE>

        The Company is pursuing  areas of product  development in which there is
the potential for extensive technological innovation in relatively short periods
of time. Rapid technological  change or developments by others may result in the
Company's proposed products becoming obsolete or non-competitive.

        DEPENDENCE  ON  THIRD-PARTY  REIMBURSEMENT.   Successful  sales  of  the
Company's proposed products in the United States and other countries will depend
on the availability of adequate  reimbursement  from third-party  payors such as
governmental  entities,  managed care organizations and private insurance plans.
Reimbursement  by a  third-party  payor  may  depend  on a  number  of  factors,
including  the  payor's  determination  that  use  of  a  product  is  safe  and
efficacious,  neither  experimental nor  investigational,  medically  necessary,
appropriate  for the specific  patient and cost effective.  Since  reimbursement
approval is required from each payor  individually,  seeking such approvals is a
time-consuming   and  costly  process.   Third-party   payors   routinely  limit
reimbursement  coverage and in many instances are exerting  significant pressure
on medical  suppliers to lower their prices.  There is  significant  uncertainty
concerning  third-party  reimbursement for the use of any pharmaceutical product
incorporating  new  technology,  and  there  is no  assurance  that  third-party
reimbursement  will be available for the Company's  proposed  products,  or that
such reimbursement,  if obtained, will be adequate. Less than full reimbursement
by governmental and other  third-party  payors for the Company's  products would
adversely  affect the market  acceptance of these products and would also have a
material  adverse  effect on the  Company.  Further,  health care  reimbursement
systems  vary from  country  to  country,  and there  can be no  assurance  that
third-party  reimbursement  will be made  available for the  Company's  proposed
products under any other reimbursement system.

        HEALTH CARE REFORM.  The health care industry is undergoing  fundamental
change in the United States as a result of economic,  political  and  regulatory
influences.  There exists a powerful trend toward managed care that is motivated
by a desire to reduce costs and prices of health care.  The Company  anticipates
that the  health  care  industry,  particularly  insurance  companies  and other
third-party  payors,  will  continue to promote  cost  containment  measures and
alternative  health care delivery systems,  and political debate of these issues
will most likely  continue.  The Company cannot  predict which specific  reforms
will be proposed or adopted by industry or government or the precise effect that
such  proposals or adoption  may have on the Company.  There can be no assurance
that health care reform  initiatives  will not have a material adverse effect on
the Company.

        CONDUCTING  BUSINESS ABROAD. To the extent the Company conducts business
outside the United  States,  it may do so through  licenses,  joint  ventures or
other contractual arrangements for the development,  manufacturing and marketing
of its proposed  products.  No  assurance  can be given that the Company will be
able to establish suitable  arrangements,  that the necessary foreign regulatory
approvals  for its  proposed  product  will be  obtained,  that  foreign  patent
coverage will be available or that the development and marketing of its proposed
products through such licenses, joint ventures or other contractual arrangements
will be  successful.  The Company might also have greater  difficulty  obtaining
proprietary  protection for its proposed  products and technologies  outside the
United  States  and  enforcing  its  rights  in  foreign  courts.   Furthermore,
international operations and sales may be limited or disrupted by the imposition
of  governmental  controls  regulation  of  medical  products,   export  license
requirements,  political  instability,  trade restrictions,  changes in tariffs,
exchange  rate   fluctuations   and   difficulties  in  managing   international
operations.

        RISK OF  LIABILITY;  ADEQUACY  OF  INSURANCE  COVERAGE;  RISK OF PRODUCT
RECALL.  The Company's  business may be affected by potential  product liability
risks which are inherent in the testing, manufacturing and marketing of proposed
pharmaceutical  products  to be  developed  by  the  Company.  There  can  be no
assurance  that  product  liability  claims  will not be  asserted  against  the
Company, its collaborators or licensees.  The use of proposed products developed
by the  Company in  clinical  trials and the  subsequent  sale of such  proposed
products is likely to cause the Company to bear all or a portion of those risks.
Such litigation claims could have a material adverse effect on the Company.  The
Company  has  liability  insurance  providing  up  to  $5,000,000  coverage  per
occurrence  and in the aggregate as to certain  clinical  trial risks,  and will
seek   to   obtain   additional   product   liability   insurance   before   the
commercialization  of its  products.  There can be no assurance,  however,  that
insurance  will be available to the Company on acceptable  terms,  if at all, or
that such  coverage  once  obtained  would be  adequate  to protect  the Company
against  future  claims or that a medical  malpractice  or other claim would not
materially  and  adversely  affect  the  Company.  Furthermore,  there can be no
assurance that any collaborators or licensees of the Company will agree

                                       11

<PAGE>

to indemnify the Company, be sufficiently insured or have a net worth sufficient
to satisfy any such product  liability  claims.  In addition,  products  such as
those proposed to be sold by the Company may be subject to recall for unforeseen
reasons. Such a recall could have a material adverse effect on the Company.

        DEPENDENCE ON KEY MANAGEMENT AND QUALIFIED PERSONNEL; LIMITED PERSONNEL;
DEPENDENCE ON CONTRACTORS.  The Company is highly  dependent upon the efforts of
its  management.  The loss of the services of one or more members of  management
could impede the achievement of development  objectives.  Due to the specialized
scientific  nature  of the  Company's  business,  the  Company  is  also  highly
dependent  upon its  ability to  attract  and retain  qualified  scientific  and
technical personnel. There is intense competition for qualified personnel in the
areas of the Company's activities and there can be no assurance that the Company
can presently,  or will be able to continue to, attract and retain the qualified
personnel  necessary  for  the  development  of its  existing  business  and its
expansion into areas and activities requiring additional expertise. In addition,
the Company's  intended or possible  growth and expansion  into areas  requiring
additional  skill  and  expertise,  such  as  marketing,   including  sales  and
distribution,  will require the  addition of new  management  personnel  and the
development of additional expertise by existing management  personnel.  The loss
of, or failure to recruit,  scientific,  technical and marketing and  managerial
personnel could have a material adverse effect on the Company.

         The Company relies, in substantial part, and for the foreseeable future
will rely, on certain  independent  organizations,  advisors and  consultants to
provide certain services,  including substantially all aspects of manufacturing,
regulatory approval and clinical management.  There can be no assurance that the
services of independent organizations, advisors and consultants will continue to
be available  to the Company on a timely basis when needed,  or that the Company
could find  qualified  replacements.  The  Company's  advisors  and  consultants
generally  sign  agreements  that provide for  confidentiality  of the Company's
proprietary  information.  However,  there can be no assurance  that the Company
will be able to maintain the  confidentiality of the Company's  technology,  the
dissemination of which could have a material adverse effect on the Company.

        HAZARDOUS  MATERIALS;  COMPLIANCE WITH  ENVIRONMENTAL  REGULATIONS.  The
Company's  research and  development  involves the  controlled  use of hazardous
materials,  chemicals and various  radioactive  compounds.  Although the Company
believes that its safety procedures for handling and disposing of such materials
comply with the standards  prescribed by federal,  state and local  regulations,
the risk of accidental  contamination  or injury from these materials  cannot be
completely  eliminated.  In the event of such an accident,  the Company could be
held liable for any damages that result and any such liability  could exceed the
resources of the Company. The Company may incur substantial costs to comply with
environmental  regulations if the Company develops  manufacturing  capacity.  In
addition,  there can be no assurance that current or future  environmental laws,
rules,  regulations  or policies will not have a material  adverse effect on the
Company.

        SHARES ELIGIBLE FOR FUTURE SALE; EFFECT ON ABILITY TO RAISE CAPITAL.  Of
the 3,696,916 shares of Common Stock outstanding, 3,413,321 are freely tradable,
and are not subject to any  restrictions,  either under securities laws or under
lock-up or other  agreements.  107,465 shares of Series A Convertible  Preferred
Stock are outstanding  and are currently  convertible  into 2,215,773  shares of
Common Stock at a conversion  rate which is subject to adjustment  under certain
circumstances.  Additional  Common  Stock,  including  up  to  1,843,364  shares
obtainable  on the  exercise of  outstanding  options and  warrants,  may become
eligible  for sale in the public  market  from time to time in the  future.  The
Company  has  filed a  registration  statement  on Form  S-3 to  register  up to
6,634,432  shares  of  Common  Stock,   including  Common  Stock  obtainable  on
conversion  of Series A  Convertible  Preferred  Stock and  exercise  of certain
warrants,  and intends to file a registration  statement on Form S-8 to register
approximately  1,272,000  shares of Common Stock  available  for issuance  under
certain  option  grants,  including the Company's 1996 Stock Option Plan, in the
near  future.  Many of the options and  warrants are likely to be exercised at a
time when the Company might be able to obtain  additional equity capital on more
favorable  terms.  While those  options and warrants are  outstanding,  they may
adversely  affect  the terms on which the  Company  could  obtain  capital.  The
Company  cannot  predict the effect,  if any, that market sales of Common Stock,
the exercise of options or warrants,  or the  availability  of such Common Stock
for  sale  will  have  on  the  market  price  prevailing  from  time  to  time.
Furthermore, certain holders of the Company's securities have the right to cause
the Company to register their Common Stock under the Securities Act


                                       12

<PAGE>

in the future, which could cause the Company to incur substantial expense, could
affect the Company's  ability to raise capital and also materially and adversely
affect the prevailing market price of the Company's Common Stock.

        ANTI-TAKEOVER  CONSIDERATIONS.  The Company's  Restated  Certificate  of
Incorporation,  as amended (the "Certificate of  Incorporation"),  authorize the
issuance of up to 10,000,000 shares of preferred stock, par value $.01 per share
("Preferred  Stock"),  of which 18,856 are  authorized for issuance as shares of
Series B Convertible  Preferred Stock and 264,000 are authorized for issuance as
shares of Series A Convertible Preferred Stock. See "Description of Securities."
The  Company's  Board of  Directors  has the  authority,  without  action by the
Company's  stockholders,  to issue  shares of  preferred  stock,  and to fix the
rights  and  preferences  of such  preferred  stock,  except as  limited  in the
Certificates  of  Designations  relating to the Series B  Convertible  Preferred
Stock and the Series A Convertible  Preferred Stock.  Accordingly,  the Board of
Directors is empowered,  without stockholder  approval, to issue a new series of
preferred stock with dividend,  liquidation,  conversion, voting or other rights
which could adversely  affect the voting power or other rights of the holders of
Common Stock. Such authority,  together with certain  provisions of Delaware law
and of the  Company's  Certificate  of  Incorporation  and bylaws,  may have the
effect of delaying,  deterring or preventing a change in control of the Company,
may discourage bids for the Company's  Common Stock at a premium over the market
price and may adversely affect the market price, and the voting and other rights
of the  holders,  of the  Common  Stock.  Although  the  Company  has no present
intention to issue any  additional  shares of its  preferred  stock,  other than
those  already  authorized  for  issuance  upon  exercise  of  certain  Series A
Convertible  Preferred Stock Placement Warrants,  there can be no assurance that
the Company will not do so in the future.

        NO  DIVIDENDS.  The  Company has not paid cash  dividends  on its Common
Stock since its inception and does not intend to pay any dividends on its Common
Stock in the foreseeable  future.  The Series B Convertible  Preferred Stock and
the Series A Convertible Preferred Stock have dividend preferences.

        EQUITY  DILUTION.  Purchasers of the Registered  Shares will  experience
immediate and substantial  dilution of their  investment with respect to the net
tangible book value per share of Common Stock.

        POTENTIAL  CONVERSION  PRICE  RESET OF  SERIES B  CONVERTIBLE  PREFERRED
STOCK. The 18,875 shares of Series B Convertible Preferred Stock outstanding are
convertible,  at the option of the holders,  into shares of Common  Stock,  at a
conversion  price as of the date of this Prospectus of $5.50 and stated value of
$100 per share of Series B Convertible  Preferred Stock. The conversion price is
subject to a reset upon the  happening  of certain  events.  Any decrease in the
conversion  price  applicable to the Series B Convertible  Preferred  Stock will
result in the issuance of additional  shares of Common Stock,  including some or
all of the Contingent  Shares,  and will have a dilutive effect.  The conversion
price  is  also  subject  to  adjustment   under  certain   circumstances.   See
"Description of Securities."

        CERTAIN INTERLOCKING RELATIONSHIPS; POTENTIAL CONFLICTS OF INTEREST. One
of the directors of the Company is an officer of Paramount Capital,  Inc. and of
Paramount Capital Investments, LLC ("Paramount Capital Investments").  Paramount
Capital  Investments is a merchant bank and venture capital firm specializing in
biotechnology  and  biopharmaceutical  companies.  In the regular  course of its
business,  Paramount  Capital  Investments  identifies,  evaluates  and  pursues
investment opportunities in biomedical and pharmaceutical products, technologies
and companies.  Generally, Delaware corporate law requires that any transactions
between the Company and any of its affiliates be on terms that,  when taken as a
whole,  are  substantially  as favorable to the Company as those then reasonably
obtainable from a person who is not an affiliate in an arms-length  transaction.
Nevertheless,  neither  Paramount  Capital  Investments  nor any other person is
obligated  pursuant to any agreement or  understanding  with the Company to make
any additional products or technologies  available to the Company, and there can
be no assurance,  and purchasers of the Common Stock should not expect, that any
biomedical  or  pharmaceutical  product or  technology  identified  by Paramount
Capital  Investments or any other person in the future will be made available to
the Company.  In addition, certain of the officers,  directors,  consultants and
advisors  to the  Company  do and  may  from  time to time  serve  as  officers,
directors,  consultants  or advisors to other  pharmaceutical  or  biotechnology
companies, or to investment banking, venture capital or similar firms. There can
be no assurance  that such other  companies or firms will not in the future have
interests in conflict with those of the Company.

        CONTROL BY OFFICERS, DIRECTORS, AND EXISTING STOCKHOLDERS. The Company's
executive  officers,  directors,  five percent (5%)  stockholders and affiliated
entities  together hold  approximately  21.7% of the voting power based on stock
outstanding as of the date of this  Prospectus,  and hold options or warrants to
acquire a significant  additional  number of shares of Common Stock and Series A
Convertible  Preferred Stock. As a result, these stockholders,  acting together,
will be able to influence  significantly  most matters requiring approval by the
stockholders  of the  Company,  including  the  election  of  directors.  Such a
concentration  of  ownership  may have the effect of  delaying or  preventing  a
change in control of the Company,  including  transactions in which stockholders
might  otherwise  receive a premium for their  shares over then  current  market
prices.


                                 USE OF PROCEEDS

        The  Company  will  not  receive  any  proceeds  from  the  sale  of the
Registered Shares.

                                       13

<PAGE>

                            DESCRIPTION OF SECURITIES

        The Company is authorized to issue 75,000,000 shares of Common Stock and
10,000,000 shares of Preferred Stock.

COMMON STOCK

        As of the date of this Prospectus,  there are 3,696,916 shares of Common
Stock  outstanding,  a maximum of 4,402,318  shares of Common Stock  issuable on
conversion or exercise of securities  convertible into or exercisable for Common
Stock  at  conversion  and  exercise  rates  effective  as of the  date  of this
Prospectus,  including  shares of Common  Stock  issuable on  conversion  of all
Preferred Stock, and 343,182  Contingent Shares issuable on conversion of Series
B Convertible  Preferred  Stock  assuming the maximum  decrease from the current
conversion  price.  Holders of Common  Stock have one vote per share and have no
preemption rights. Holders of Common Stock have the right to participate ratably
in all distributions, whether of dividends or assets in liquidation, dissolution
or winding up,  subject to any  superior  rights of holders of  Preferred  Stock
outstanding at the time.

PREFERRED STOCK

        Two series of Preferred Stock have been  established,  264,000 shares of
Series A Convertible  Preferred  Stock,  of which 107,465 shares are outstanding
and 13,778  shares  are  issuable  upon  exercise  of the  Series A  Convertible
Preferred  Stock Placement  Warrants,  and 18,875 shares of Series B Convertible
Preferred Stock, of which all 18,875 shares are outstanding.

        Series B Convertible Preferred Stock. Each share of Series B Convertible
Preferred  Stock is convertible at the option of the holder,  at any time,  into
the number of shares of Common Stock  determined  by  multiplying  each share of
Series B  Convertible  Preferred  Stock by $100 and dividing the result by $5.50
(the "Conversion  Price"),  subject to adjustment as described below. Each share
of  Series  B  Convertible   Preferred  Stock  is  currently   convertible  into
approximately  18.2 shares of Common Stock (fractional shares will be cashed out
on conversion).

         The  Conversion  Price is subject to  adjustment  upon the  occurrence,
without    limitation,    of   a    merger,    reorganization,    consolidation,
reclassification, stock dividend or stock split which will result in an increase
or decrease in the number of shares of Common Stock outstanding.  The Conversion
Price is also subject to  adjustment on August 26, 1998 (the "Reset  Date"),  if
the  average  closing  bid  price  of the  Common  Stock  for  the  thirty  (30)
consecutive  trading  days  immediately  preceding  the Reset  Date (the  "Reset
Trading  Price") is less than $6.05 (a "Reset Event").  Upon a Reset Event,  the
Conversion  Price will be reduced  to  greater  of (i) the Reset  Trading  Price
divided by 1.1 or (ii) $2.75.


                              SELLING STOCKHOLDERS

        This  Prospectus  offers  the  Registered  Shares  for resale by Selling
Stockholders who have acquired or will acquire Common Stock issued on conversion
at the current  Conversion Price of Series B Convertible  Preferred Stock. As of
the date of this Prospectus, the Company has issued no shares of Common Stock on
conversion of any Series B Convertible Preferred Stock.

        Common  Stock  ownership  information  in the  following  table is based
solely upon (i)  information  furnished to the Company by Selling  Stockholders,
(ii) reports  furnished to the Company  pursuant to the rules of the  Commission
and (iii) the Company's stock ownership records.

        The following table sets forth as of the date of this Prospectus (i) the
name of each  Selling  Stockholder,  (ii) the  number of shares of Common  Stock
which each holder  owns or are  issuable  before the  Offering,  including  upon
conversion of the Series B Convertible Preferred Stock, but excluding Contingent
Shares,  (iii) the number of Contingent  Shares  issuable upon a decrease in the
Conversion  Price of Series B Convertible  Preferred Stock (see  "Description of
Securities"),  (iv) the  number  of  shares of  Common  Stock  included  in this
Registration  Statement,  (v) the  number of shares of Common  Stock  which each
Selling  Stockholder  will own or are issuable  following the  completion of the
Offering  (assuming the sale of all stock offered and no other  dispositions  or
acquisitions  of Common Stock) and (vi) the percentage of shares of Common Stock
which each Selling

                                       14

<PAGE>



Stockholder  will own or are issuable  following the  completion of the Offering
(assuming  the  sale  of  all  stock  offered  and  no  other   dispositions  or
acquisitions of Common Stock).  No Selling  Stockholder has had, within the past
three  years,  any  position,  office or other  material  relationship  with the
Company or any of the Company's predecessors or affiliates.

<TABLE>
<CAPTION>
                                       SHARES OF
                                         COMMON                                   SHARES        PERCENT
                                         STOCK                                      OF            OF
                                        OWNED OR                                  COMMON        COMMON
                                        ISSUABLE                                   STOCK         STOCK
                                         BEFORE                                    OWNED         OWNED
                                        OFFERING                                    OR            OR
                                       (EXCLUDING    CONTINGENT                  ISSUABLE      ISSUABLE
                                       CONTINGENT      SHARES     REGISTERED       AFTER         AFTER
    NAME OF SELLING STOCKHOLDER        SHARES) (1)    ISSUABLE     SHARES (2)   OFFERING (3)    OFFERING
- -----------------------------------   ------------  ------------ ------------- -------------  -----------
<S>                                        <C>           <C>           <C>            <C>       <C>
JNC Opportunity Fund Ltd. (4)              290,909       290,909       581,818             0       *
Leaf, Robert (5)                            19,399         9,091        18,181        10,309       *
Schwartz, Carl F. (5)                       11,972         6,818        13,636         5,154       *
Strassman, Joseph and Barbara (5)          108,527        36,364        72,727        72,164     1.8%
</TABLE>
- -----------------------------------

* indicates less than one percent

(1)     Includes  shares of Common Stock  issuable  upon  conversion of Series B
        Convertible  Preferred Stock at the current  Conversion  Price of $5.50,
        but does not include any Contingent  Shares  issuable upon adjustment of
        the Conversion Price.

(2)     Includes  Common Stock issuable upon  conversion of Series B Convertible
        Preferred Stock at the current  Conversion Price of $5.50 and Contingent
        Shares.

(3)     Assumes sale of all Registered Shares offered hereby.

(4)     JNC  Opportunity  Fund Ltd.  has  contractually  agreed to restrict  its
        ability to convert  Series B Convertible  Preferred  Stock to the extent
        that the number of shares of Common Stock held by it and its  affiliates
        after such  conversion  exceeds  4.999% of the total number of shares of
        issued and outstanding Common Stock.

(5)     Includes  shares of Common Stock  issuable  upon  conversion of Series A
        Convertible  Preferred Stock at the current  conversion price applicable
        to the  Series A  Convertible  Preferred  Stock of  $4.85,  but does not
        include any additional shares issuable in the event of a decrease in the
        conversion price applicable to the Series A Convertible Preferred Stock.


                              PLAN OF DISTRIBUTION

        The Selling Stockholders,  and their pledgees, donees,  transferees,  or
other  successors-in-interest,  may, from time to time, sell all or a portion of
the  Registered  Shares  on  the  Nasdaq  SmallCap,   in  privately   negotiated
transactions or otherwise, at fixed prices that may be changed, at market prices
prevailing  at the time of sale,  at prices  related to such market prices or at
negotiated prices. The Registered Shares may be sold by the Selling Stockholders
by one or more of the following methods, without limitation: (a) block trades in
which the broker or dealer so engaged will attempt to sell the Registered Shares
as agent but may  position  and  resell a portion of the block as  principal  to
facilitate the transaction, (b) purchases by a broker or dealer as principal and
resale by such broker or dealer for its account pursuant to this Prospectus, (c)
an exchange  distribution  in accordance  with the rules of such  exchange,  (d)
ordinary  brokerage  transactions  and  transaction in which the broker solicits
purchasers,  (e)  privately  negotiated  transactions,  (f) short  sales and (g)
combinations  of any such  methods of sale.  In  effecting  sales,  brokers  and
dealers  engaged by the Selling  Stockholders  may arrange for other  brokers or
dealers to participate.  Brokers or dealers may receive commissions or discounts
from the Selling  Stockholders (or, if any such  broker-dealer acts as agent for
the purchaser of such shares,  from such  purchaser) in amounts to be negotiated
which are not expected to exceed those

                                       15

<PAGE>

customary in the types of transactions  involved.  Broker-dealers may agree with
the Selling Stockholders to sell a specified number of such Registered Shares at
a stipulated price per share, and, to the extent such broker-dealer is unable to
do so acting as agent for a Selling  Stockholder,  to purchase as principal  any
unsold  Registered  Shares at the price  required to fulfill  the  broker-dealer
commitment to the Selling  Stockholder.  Broker-dealers  who acquire  Registered
Shares as principal may thereafter  resell such  Registered  Shares from time to
time in  transactions  (which may involve  block  transactions  and sales to and
through other  broker-dealers,  including  transactions of the nature  described
above) in the  over-the-counter  market or otherwise at prices and on terms then
prevailing  at the time of sale,  at prices  then  related  to the  then-current
market price or in negotiated transactions and, in connection with such resales,
may pay to or receive from the purchasers of such Registered Shares  commissions
as described above. The Selling Stockholders may also sell the Registered Shares
in accordance  with Rule 144 under the Securities  Act,  rather than pursuant to
this Prospectus.

        The  Selling   Stockholders  and  any   broker-dealers  or  agents  that
participate with the Selling  Stockholders in the sale of the Registered  Shares
may be deemed to be  "underwriters"  within the meaning of the Securities Act in
connection  with such sales.  In such event,  any  commissions  received by such
broker-dealers  or agents and any profit on the resale of the Registered  Shares
purchased  by them may be deemed to be  underwriting  commissions  or  discounts
under the Securities Act.

        From time to time the Selling  Stockholders  may engage in short  sales,
short sales against the box, puts and calls and other transactions in securities
of the Company or derivatives  thereof,  and may sell and deliver the Registered
Shares in connection  therewith or in settlement  of  securities  loans.  If the
Selling  Stockholders  engage in such transactions,  the Conversion Price may be
affected. From time to time the Selling Stockholders may pledge their Registered
Shares  pursuant to the margin  provisions of its customer  agreements  with its
brokers.  Upon a default by the Selling  Stockholders,  the broker may offer and
sell the pledged Registered Shares from time to time.

        The Company has, as of the date of this Prospectus, informed the Selling
Stockholders that the  anti-manipulation  provisions of Regulation M promulgated
under the Exchange Act may apply to the sales of Registered  Shares. The Company
has also advised the Selling  Stockholders  of the  requirement  for delivery of
this Prospectus in connection with any sale of the Registered Shares.

        Certain  Selling  Stockholders  may from time to time purchase shares of
Common  Stock  in the  open  market.  The  Company  has,  as of the date of this
Prospectus,  informed the Selling Stockholders that they should not commence any
distribution  of  the  Registered  Shares  unless  they  have  terminated  their
purchasing  of, bidding for and attempting to induce any other person to bid for
or purchase Common Stock in the open market as provided in applicable securities
regulations, including Regulation M.

        The  Company is required  to pay all fees and  expenses  incident to the
registration of the Registered Shares,  including fees and disbursements (not to
exceed an  aggregate  of $5,000) of counsel  to the  Selling  Stockholders.  The
Company has agreed to indemnify the Selling Stockholders against certain losses,
claims, damages and liabilities, including liabilities under the Securities Act.


                 INDEMNIFICATION FOR SECURITIES ACT LIABILITIES

        The Company has obtained a directors' and officers'  liability insurance
policy which covers,  among other things,  certain liabilities arising under the
Securities Act.

        In the  agreement  pursuant  to which the  Company  has  registered  the
Registered Shares in the Registration Statement,  the Company has agreed, to the
extent  permitted  by law, to  indemnify  each  Selling  Stockholder  (including
control persons,  officers,  directors,  agents,  underwriters  retained by such
Selling  Stockholder in connection with the offer and sale of Registered Shares,
brokers,  investment advisors and employees of such Selling Stockholder) against
liabilities  arising out of untrue  statements or omissions of material facts in
the  Registration  Statement or this  Prospectus,  except to the extent that the
untrue  statement  or omission is based on written  information  provided by the
Selling  Stockholder  for  inclusion  in  the  Registration  Statement  or  this
Prospectus.  Each Selling  Stockholder has agreed to indemnify the Company,  its
directors, officers, agents, employees and control persons against liabilities

                                       16

<PAGE>

arising  out  of  untrue  statements  or  omissions  of  material  facts  in the
Registration  Statement  or this  Prospectus,  but only to the  extent  that the
untrue  statement  or omission is based on written  information  provided by the
Selling  Stockholder  for  inclusion  in  the  Registration  Statement  or  this
Prospectus,  and only in an amount no greater than the net proceeds  received by
such Selling  Stockholder upon the sale of the Registered  Shares giving rise to
the indemnification obligation.

        Insofar as indemnification  for liabilities arising under the Securities
Act may be  permitted to  directors,  officers  and  controlling  persons of the
Company pursuant to the foregoing provisions, or otherwise, the Company has been
informed that in the opinion of the Commission such  indemnification  is against
public  policy  as  expressed  in  the   Securities   Act  and  is,   therefore,
unenforceable.


                                  LEGAL MATTERS

        Certain legal matters  relating to the Registered  Shares offered hereby
will be passed upon for the Company by Rubin Baum Levin Constant & Friedman, New
York, New York,  counsel to the Company.  Members of Rubin Baum Levin Constant &
Friedman have been granted  options under the 1996 Stock Option Plan to purchase
an aggregate of 12,500 shares of Common Stock at an exercise  price of $8.00 per
share, and 5,000 shares of Common Stock at an exercise price of $6.00 per share.
The options are immediately exercisable and expire on dates ranging from January
3, 2007 to January 21, 2008.


                                     EXPERTS

        The audited  financial  statements  incorporated  by  reference  in this
registration  statement  have been audited by Arthur  Andersen LLP,  independent
public accountants,  as indicated in their report with respect thereto,  and are
included herein in reliance upon the authority of said firm as experts in giving
said reports.

                                       17

<PAGE>


                       [OUTSIDE BACK COVER OF PROSPECTUS]
- --------------------------------------------------------------------------------


NO DEALER,  SALESMAN OR OTHER PERSON HAS BEEN AUTHORIZED TO GIVE  INFORMATION OR
TO MAKE ANY  REPRESENTATIONS NOT CONTAINED IN THIS PROSPECTUS IN CONNECTION WITH
THE OFFER MADE BY THIS  PROSPECTUS  AND, IF GIVEN OR MADE,  SUCH  INFORMATION OR
REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE COMPANY
OR THE SELLING STOCKHOLDERS. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER OF ANY
SECURITIES OTHER THAN THOSE TO WHICH IT RELATES OR A SOLICITATION OF AN OFFER TO
BUY ANY OF THE SECURITIES  OFFERED HEREBY TO ANY PERSON IN ANY  JURISDICTION  IN
WHICH SUCH AN OFFER OR SOLICITATION  WOULD BE UNLAWFUL.  NEITHER THE DELIVERY OF
THIS  PROSPECTUS NOR ANY SALES MADE HEREUNDER  SHALL,  UNDER ANY  CIRCUMSTANCES,
CREATE ANY IMPLICATION  THAT THE INFORMATION  CONTAINED  HEREIN IS CORRECT AS OF
ANY TIME SUBSEQUENT TO THE DATE HEREOF.

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



                                TABLE OF CONTENTS

           Item                                                  Page Number
       ------------                                             -------------
Available Information.........................................Inside Front Cover
Documents Incorporated By Reference...........................Inside Front Cover
Business Summary.....................................................1
Risk Factors.........................................................5
Use of Proceeds.....................................................13
Description of Securities...........................................14
Selling Stockholders................................................14
Plan of Distribution................................................15
Indemnification for Securities Act Liabilities......................16
Legal Matters.......................................................17
Experts.............................................................17
Table of Contents.............................................Outside Back Cover


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


                                     686,362
                                  COMMON STOCK


                               [GRAPHIC OMITTED]



                           PALATIN TECHNOLOGIES, INC.

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

                                   PROSPECTUS

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




                                             

<PAGE>



                 PART II. INFORMATION NOT REQUIRED IN PROSPECTUS


ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

           The Company will bear all expenses, estimated at $55,000, incurred in
connection with the  registration of the Registered  Shares under the Securities
Act  and  qualification  or  exemption  of the  Registered  Shares  under  state
securities  laws,  excluding fees of legal counsel for any Selling  Stockholder.
Each  Selling  Stockholder  will  pay all  underwriting  discounts  and  selling
commissions  applicable  to the  sale of the  Selling  Stockholder's  Registered
Shares.


SEC registration fees..............       $1,310
Blue Sky fees and expenses*........      $15,000
Costs of printing and engraving*...       $2,500
Legal fees and expenses*...........      $25,000
Accounting fees and expenses*......       $5,000
Miscellaneous*.....................       $6,190
                                          ------
 TOTAL.............................      $55,000
 *Estimated.


ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

           Section 145 of the Delaware  General  Corporation Law provides that a
corporation  may  indemnify any person who was or is a party or is threatened to
be  made a  party  to any  threatened,  pending  or  completed  action,  suit or
proceeding,  whether civil, criminal,  administrative or investigative by reason
of the fact  that he is or was a  director,  officer,  employee  or agent of the
corporation, or serving at the request of the corporation in similar capacities,
against expenses (including attorneys' fees), judgments, fines, and amounts paid
in settlement  actually and reasonably  incurred by him in connection  with such
action,  suit or  proceeding  if he  acted  in good  faith  and in a  manner  he
reasonably  believed  to be in or not  opposed  to  the  best  interests  of the
corporation,  and,  with respect to any criminal  action or  proceeding,  had no
reasonable  cause to believe his conduct was unlawful.  In the case of an action
or suit by or in the right of the corporation,  no indemnification shall be made
with  respect to any claim,  issue or matter as to which such person  shall have
been adjudged to be liable to the corporation unless and only to the extent that
the court having  jurisdiction  shall  determine  that such person is fairly and
reasonably entitled to indemnity.

           Article V, Section 3 of the Company's  Certificate  of  Incorporation
provides  that  to  the  fullest  extent   permitted  by  the  Delaware  General
Corporation  Law, no director of the Company shall be  personally  liable to the
Company or its  stockholders for monetary damages for breach of a fiduciary duty
as a director.

           Article VI of the Company's  Certificate  of  Incorporation  provides
that the Company shall make the  indemnification  permitted under Section 145 of
the Delaware  General  Corporation  Law, as summarized  above,  but only (unless
ordered  by a  court)  upon  a  determination  by a  majority  of  a  quorum  of
disinterested  directors,  by independent legal counsel in a written opinion, or
by the stockholders, that the indemnified person has met the applicable standard
of conduct.  Article VI further  provides that the Company may advance  expenses
for defending  actions,  suits or proceedings  upon such terms and conditions as
the Company's  Board of Directors  deems  appropriate,  and that the Company may
purchase  insurance on behalf of indemnified  persons whether or not the Company
would have the power to indemnify  such persons  under  Section 145 the Delaware
General Corporation Law.

                                   Part II - 1

<PAGE>

           The Company's Bylaws contain  substantially the same  indemnification
provisions as the Company's Certificate of Incorporation, summarized above.

           The Company's employment agreement with Edward J. Quilty requires the
Company to indemnify  and advance  expenses to Edward J. Quilty,  the  Company's
Chairman of the Board,  President and Chief  Executive  Officer,  to the fullest
extent permitted under Section 145 of the Delaware General Corporation Law.

           The  agreement  pursuant  to which the  Company  has  registered  the
Registered Shares in the Registration  Statement  provides that the Company will
indemnify  each  Selling  Stockholder  (including  control  persons,   officers,
directors,   agents,  underwriters  retained  by  such  Selling  Stockholder  in
connection  with the offer and sale of Registered  Shares,  brokers,  investment
advisors  and  employees  of  such  Selling   Stockholder),   and  each  Selling
Stockholder  will  indemnify  the  Company,  and in  some  cases  the  Company's
directors,  officers,  agents,  employees and control  persons,  against certain
liabilities which might arise from the Offering.  The indemnifications may cover
liabilities  arising  under the  Securities  Act.  The  obligation  of a Selling
Stockholder to indemnify the Company or its affiliates is (absent fraud) limited
to  liabilities  based on  written  information  which the  Selling  Stockholder
provides to the Company for  inclusion  in the  Registration  Statement,  and is
limited to an amount no greater than the net  proceeds  received by such Selling
Stockholder  upon  the  sale  of  the  Registered  Shares  giving  rise  to  the
indemnification obligation.

           The  Company  has  obtained  a  directors'  and  officers'  liability
insurance policy which covers,  among other things,  certain liabilities arising
under the Securities Act.


ITEM 16.  EXHIBITS.

                                    EXHIBITS

           The following exhibits are filed with this Registration Statement, or
incorporated by reference as noted:

           2.1    Agreement  and Plan of  Reorganization  dated as of April  12,
                  1996 by and between  Interfilm,  Inc.,  Interfilm  Acquisition
                  Corp. and RhoMed  Incorporated;  incorporated  by reference to
                  Exhibit  2.1 of the  Company's  Form 8-K dated June 25,  1996,
                  filed with the Commission on July 10, 1996.

           2.2    Waiver  and  Consent  dated  as  of  June  24,  1996,  between
                  Interfilm,   Inc.,  Interfilm  Acquisition  Corp.  and  RhoMed
                  Incorporated;  incorporated by reference to Exhibit 2.2 of the
                  Company's  Form 10-KSB Annual Report for the period ended June
                  30, 1996, filed with the Commission on September 27, 1996.

           4.1    Specimen   Certificate  for  Common  Stock;   incorporated  by
                  reference to Exhibit 4.1 of the Company's  Form 8-K dated July
                  19, 1996, filed with the Commission on August 9, 1996.

           4.2    Specimen Certificate for Series B Convertible Preferred Stock;
                  incorporated by reference to Exhibit 4.7 of the Company's Form
                  8-K dated April 28, 1998,  filed with the Commission on May 8,
                  1998.

           5.1    Opinion of  Rubin Baum Levin Constant  & Friedman,  counsel to
                  the Company, re: legality.

           23.1   Consent of Rubin Baum Levin Constant & Friedman.  (Included in
                  Exhibit 5.1.)

           23.2   Consent of Arthur Andersen LLP.

           24.1   Power of Attorney (included on the signature page hereof).

           27     Financial  Data  Schedule;   incorporated   by  reference  and
                  previously  filed as an exhibit to the  Company's  Form 10-QSB
                  Quarterly  Report for the quarter ended March 31, 1998,  filed
                  with the Commission on May 14, 1998.


                                   Part II - 2

<PAGE>


ITEM 17.  UNDERTAKINGS.

     The Company will:

     (1) File, during any period in which it offers or sells securities, a post-
effective amendment to this registration statement to:

          (i) include  any  prospectus  required  by  Section  10(a)(3)  of  the
Securities Act;

          (ii) reflect in the prospectus any facts or events which, individually
or together,  represent a fundamental change in the information set forth in the
registration statement.  Notwithstanding the foregoing, any increase or decrease
in volume of securities offered (if the total dollar value of securities offered
would not exceed that which was  registered)  and any deviation  from the low or
high end of the estimated maximum offering range may be reflected in the form of
prospectus  filed  with  the  Commission  pursuant  to Rule  424(b)  if,  in the
aggregate,  the changes in volume and price  represent no more than a 20% change
in the  maximum  aggregate  offering  price  set  forth in the  "Calculation  of
Registration Fee" table in the effective registration statement; and

          (iii) include any  additional or changed  material  information on the
plan of distribution;

provided,  however,  that  paragraphs  (1)(i) and (1)(ii)  will not apply if the
information  required  to be  included in a  post-effective  amendment  by those
paragraphs  is  contained  in periodic  reports  filed with or  furnished to the
Commission  by the  registrant  pursuant  to Section 13 or Section  15(d) of the
Securities  Exchange  Act of 1934  that are  incorporated  by  reference  in the
registration statement.

     (2)  For  determining  liability  under  the  Securities  Act,  treat  each
post-effective  amendment  as a new  registration  statement  of the  securities
offered, and the offering of such securities at that time to be the initial bona
fide offering thereof.

     (3) File a post-effective  amendment to remove from registration any of the
securities that remain unsold at the end of the offering.

     The  undersigned   registrant  hereby  undertakes  that,  for  purposes  of
determining  any  liability  under  the  Securities  Act,  each  filing  of  the
registrant's  annual  report  pursuant to section  13(a) or section 15(d) of the
Exchange Act (and, where  applicable,  each filing of an employee benefit plan's
annual  report   pursuant  to  section  15(d)  of  the  Exchange  Act)  that  is
incorporated by reference in the registration  statement shall be deemed to be a
new registration  statement relating to the securities offered therein,  and the
offering of such  securities at that time shall be deemed to be the initial bona
fide offering thereof.

     Insofar as indemnification for liabilities arising under the Securities Act
may  be  permitted  to  directors,  officers  and  controlling  persons  of  the
registrant pursuant to the foregoing  provisions,  or otherwise,  the registrant
has been advised that in the opinion of the Commission such  indemnification  is
against  public  policy as expressed in the  Securities  Act and is,  therefore,
unenforceable.  In the  event  that a claim  for  indemnification  against  such
liabilities  (other than the payment by the  registrant of expenses  incurred or
paid by a  director,  officer or  controlling  person of the  registrant  in the
successful  defense of any  action,  suit or  proceeding)  is  asserted  by such
director,  officer or controlling person in connection with the securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been  settled by  controlling  precedent,  submit to a court of  appropriate
jurisdiction the question whether such  indemnification  by it is against public
policy as  expressed  in the  Securities  Act and will be  governed by the final
adjudication of such issue.

                                   Part II - 3

<PAGE>



                                   SIGNATURES

     Pursuant to the  requirements of the Securities Act of 1933, the registrant
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for  filing  on Form S-3 and has  duly  caused  this  registration
statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized, in the City of Princeton, State of New Jersey, on June 11, 1998.


PALATIN TECHNOLOGIES, INC.


By:  /s/ Edward J. Quilty
     ---------------------------
     Edward J. Quilty
     Chairman of the Board, President
     and Chief Executive Officer



                                   Part II - 4

<PAGE>

                                POWER OF ATTORNEY

     We, the undersigned officers and directors of Palatin  Technologies,  Inc.,
severally  constitute  Edward J. Quilty and  Stephen T. Wills,  and each of them
singly,  our true and lawful attorneys with full power to them, and each of them
singly,  to sign for us and in our names in the capacities  indicated below, the
Registration  Statement on Form S-3 filed  herewith  and any and all  subsequent
amendments to said registration  statement,  and generally to do all such things
in our names and behalf in our  capacities  as officers and  directors to enable
Palatin Technologies, Inc. to comply with all requirements of the Securities and
Exchange Commission.

     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
registration  statement  has  been  signed  by  the  following  persons  in  the
capacities and on the dates indicated.

     SIGNATURE                          TITLES                          DATE


/s/ Edward J. Quilty
- -----------------------  Chairman of the Board, President and      June 11, 1998
    Edward J. Quilty     Chief Executive Officer (principal
                         executive officer)


/s/ Carl Spana
- -----------------------  Executive Vice President and Director     June 11, 1998
    Carl Spana


/s/ Stephen T. Wills
- -----------------------  Vice President and Chief Financial        June 11, 1998
    Stephen T. Wills     Officer (principal financial and 
                         accounting officer)


/s/ Michael S. Weiss
- -----------------------  Director                                  June 11, 1998
    Michael S. Weiss


/s/ James T. O'Brien
- -----------------------  Director                                  June 11, 1998
    James T. O'Brien


/s/ John K.A. Prendergast
- -----------------------  Director                                  June 11, 1998
    John K.A. Prendergast


/s/ Robert G. Moussa
- -----------------------  Director                                  June 11, 1998
    Robert G. Moussa


                                   Part II - 5






                      RUBIN BAUM LEVIN CONSTANT & FRIEDMAN
                      ------------------------------------


                                  [LETTERHEAD]



                                June 11, 1998




Palatin Technologies, Inc.
214 Carnegie Center, Suite 100
Princeton, New Jersey 08540


     We have  acted as  counsel  for  Palatin  Technologies,  Inc.,  a  Delaware
corporation  (the  "Company"),   in  connection  with  the  preparation  of  the
Registration Statement on Form S-3 (the "Registration Statement") filed with the
Securities and Exchange  Commission (the  "Commission")  on June 11, 1998, under
the Securities Act of 1933, as amended (the "Act"),  for registration  under the
Act of the following securities of the Company:

     1. Up to  343,180  shares of common  stock,  par value  $.01 per share (the
"Common  Stock"),  issuable  upon  conversion  of 18,875 shares of the Company's
Series B Convertible  Preferred  Stock, par value $0.01 per share (the "Series B
Convertible Preferred Stock"); and

     2. Up to  343,182  additional  shares  of  Common  Stock  issuable  upon an
adjustment in the conversion price of the Series B Convertible Preferred Stock.

     As  counsel  to the  Company,  we have  examined  such  corporate  records,
documents, agreements and such matters of law as we have considered necessary or
appropriate for the purpose of this opinion. Upon the basis of such examination,
we advise you that in our opinion:




<PAGE>



RUBIN BAUM LEVIN CONSTANT & FRIEDMAN
- ------------------------------------


Palatin Technologies, Inc.
June 11, 1998
Page 2



     1. Up to  343,180  shares of  Common  Stock  issuable  upon  conversion  of
currently  outstanding  shares of Series B Convertible  Preferred  Stock, if and
when paid for and issued  upon  conversion  of the Series B  Preferred  Stock in
accordance  with  the  terms  of  the  Series  B  Convertible   Preferred  Stock
Certificate  of   Designations,   will  be  legally   issued,   fully  paid  and
non-assessable.

     2. Up to 343,182  shares of Common Stock  issuable  upon  adjustment in the
conversion  price of the Series B Convertible  Preferred Stock, if and when paid
for and issued upon  conversion of the Series B Convertible  Preferred  Stock in
accordance  with  the  terms  of  the  Series  B  Convertible   Preferred  Stock
Certificate  of   Designations,   will  be  legally   issued,   fully  paid  and
non-assessable.

     We are  members  of the Bar of the  State  of New  York,  and the  opinions
expressed herein are limited to questions arising under the laws of the State of
New York, the General  Corporation  Law of the State of Delaware and the Federal
laws of the United  States of America,  and we disclaim  any opinion  whatsoever
with respect to matters governed by the laws of any other jurisdiction.

     We consent to the filing of this opinion as an exhibit to the  Registration
Statement and to the references to this firm under the caption  "Legal  Matters"
in the Prospectus  which is a part of the Registration  Statement.  Reference is
made to the section of the Registration Statement entitled "Legal Matters" for a
description  of ownership of the Company's  securities  by certain  attorneys of
this firm.

                                    Very truly yours,


                                    RUBIN BAUM LEVIN CONSTANT & FRIEDMAN






                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS


As independent  public  accountants,  we hereby consent to the  incorporation by
reference  in this  registration  statement  of our report dated August 20, 1997
included in Palatin Technologies, Inc.'s Form 10-KSB for the year ended June 30,
1997 and to all references to our Firm included in this registration statement.




Philadelphia, PA,
 June 11, 1998










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