INTERNEURON PHARMACEUTICALS INC
10-Q, 1996-05-13
PHARMACEUTICAL PREPARATIONS
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<PAGE>

                       SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C.   20549

                                    FORM 10-Q
                              ____________________

[x]  QUARTERLY REPORT PURSUANT SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE
     ACT OF 1934

For the quarter ended March 31, 1996

[ ]  TRANSACTION REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES
     EXCHANGE ACT OF 1934

For the transition period from ___________ to _____________

                           Commission File No. 0-18728

                        INTERNEURON PHARMACEUTICALS, INC.
             (exact name of registrant as specified in its charter)

Delaware                                04-3047911
(State or other jurisdiction of         (I.R.S. Employer Identification
incorporation or organization)          Number)

One Ledgemont Center, 99 Hayden Avenue            02173
Lexington, Massachusetts                          (Zip Code)
(Address of principal executive offices)

Registrant's telephone number, including area code (617) 861-8444

(Former name, former address and former fiscal year, if changed since last
report):  Not Applicable

Indicate by check whether the registrant (1) has filed all reports required to
be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter periods that the registrant was
required to file such reports), and (2) has been subject to  such filing
requirements for the past 90 days.

               Yes   X             No
                   -----              -----

Indicate the number of shares outstanding of each of the issuer's class of
common stock, as of the latest practicable date.

     Class                                   Outstanding at April 30, 1996:
Common Stock $.001 par value                 37,510,811 shares

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                        INTERNEURON PHARMACEUTICALS, INC.

                         INDEX TO FORM 10-Q

                                                                            PAGE

PART I.   FINANCIAL INFORMATION

          Item 1.   Financial Statements

          Consolidated Balance Sheets as of March 31, 1996
          and September 30, 1995 . . . . . . . . . . . . . . . . . . . . . . . 3

          Consolidated Statements of Operations for the Three and Six Months
          ended March 31, 1996 and 1995. . . . . . . . . . . . . . . . . . . . 4

          Consolidated Statements of Cash Flows for the Six Months ended
          March 31, 1996 and 1995. . . . . . . . . . . . . . . . . . . . . . . 5

          Notes to Unaudited Consolidated Financial Statements . . . . . . . . 6


          Item 2.   Management's Discussion and Analysis of Financial
                    Condition and Results of Operations. . . . . . . . . . . . 9


PART II.  OTHER INFORMATION

          Item 4.   Submission of Matters to a Vote of
                    Security Holders . . . . . . . . . . . . . . . . . . . . .15

          Item 6.   Exhibits and Reports on Form 8-K . . . . . . . . . . . . .16


SIGNATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21


                                       -2-

<PAGE>


                        INTERNEURON PHARMACEUTICALS, INC.
                                  CONSOLIDATED
                                 BALANCE SHEETS
                                              (Unaudited)
                                     (Dollars in thousands)

                                            March 31, September 30,
                                               1996       1995
                                            --------- ---------------
                                     ASSETS
Current assets:
  Cash and cash equivalents                               $ 38,459    $ 16,781
  Marketable securities                                     31,597      18,208
  Inventory                                                  3,629           -
  Accounts receivable and other current assets               1,616         427
                                                          --------    --------
      Total current assets                                  75,301      35,416

Marketable securities                                        1,054          --
Property and equipment, net                                  1,442       1,671
Notes receivable and other assets                              332         429
                                                          --------    --------
                                                          $ 78,129    $ 37,516
                                                          --------    --------
                                                          --------    --------

                                   LIABILITIES

Current liabilities:
  Accounts payable                                         $ 2,098    $  1,161
  Accrued expenses                                           7,374       7,994
  Deferred revenue                                           1,942          --
  Current portion of capital lease obligations                 564         506
                                                          --------    --------
      Total current liabilities                             11,978       9,661


Long-term portion of capital lease obligations                 656         782
Other long-term liabilities                                     15          44

Minority interest                                           19,999       5,638


                              STOCKHOLDERS' EQUITY

Preferred stock; $.001 par value, authorized 5,000,000
shares:
  Series B, 239,425 shares issued and outstanding at
  March 31, 1996 and September 30, 1995, respectively
  (liquidation preference at March 31, 1996 $3,041);         3,000       3,000
  Series C, 5,000 shares issued and outstanding at
  March 31, 1996 and September 30, 1995, respectively
  (liquidation preference at March 31, 1996 $503);             500         500
Common stock, par value $.001; 60,000,000 shares
  authorized; 37,300,798 and 33,284,006 shares issued
  and outstanding at March 31, 1996 and September 30,
  1995, respectively                                            37          33
Additional paid-in capital                                 135,881      96,650
Accumulated deficit                                        (93,937)    (78,792)
                                                          --------    --------
      Total stockholders' equity                            45,481      21,391
                                                          --------    --------
                                                          $ 78,129    $ 37,516
                                                          --------    --------
                                                          --------    --------

   The accompanying notes are an integral part of these unaudited consolidated
                              financial statements.


                                       -3-

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                        INTERNEURON PHARMACEUTICALS, INC.
                                  CONSOLIDATED
                            STATEMENTS OF OPERATIONS
           For the three and six months ended March 31, 1996 and 1995
                                   (Unaudited)
                   (Amounts in thousands except per share data)


                    FOR THE THREE MONTHS ENDED MARCH 31,    FOR THE SIX MONTHS
ENDED MARCH 31,

                         1996      1995           1996      1995

Revenues:
Contract and license fees           $   905     $    70  $  6,249  $    103
Investment income                       661         227     1,132       401
Other                                    -           14        -         26
                                    -------     -------  --------  --------
    Total revenues                    1,566         311     7,381       530

Costs and expenses:
Research and development              3,599       3,568     6,726     7,278
Selling, general and administrative   4,276       1,780     7,024     3,502
Purchase of in-process research
     and development                  6,084           -     8,234         -
                                    -------     -------  --------  --------
     Total costs and expenses        13,959       5,348    21,984    10,780

Net loss from operations            (12,393)     (5,037)  (14,603)  (10,250)

Minority interest                       432          86      (542)       86
                                    -------     -------  --------  --------
Net loss                           $(11,961)   $ (4,951) $(15,145) $(10,164)
                                    -------     -------  --------  --------
                                    -------     -------  --------  --------
Net loss per common share          $ ( 0.34)   $ ( 0.16) $ ( 0.44) $  (0.34)
                                    -------     -------  --------  --------
                                    -------     -------  --------  --------
Weighted average common
shares outstanding                   35,308      30,407    34,411    29,719
                                    -------     -------  --------  --------
                                    -------     -------  --------  --------

   The accompanying notes are an integral part of these unaudited consolidated
                              financial statements.


                                       -4-
<PAGE>


                        INTERNEURON PHARMACEUTICALS, INC.
                                  CONSOLIDATED
                            STATEMENTS OF CASH FLOWS
                For the six months ended March 31, 1996 and 1995
                                   (Unaudited)
                             (Dollars  in thousands)


                                           SIX MONTHS ENDED MARCH 31,
                                             1996                1995

Cash flows from operating activities:
  Net loss                                                $(15,145)   $(10,164)
  Adjustments to reconcile net loss to net cash
  used by operating activities:
     Depreciation and amortization                             381         388
     (Gain) on disposal of fixed assets                         (6)         --
     Minority interest in net income/loss of
        consolidated subsidiaries                              542         (86)
     Purchase of in-process research and development         8,098          --
     Noncash compensation                                      896          --
     Change in assets and liabilities:
      Receivables and other current assets                  (1,189)        (69)
      Notes receivable and other assets                         97         (76)
      Inventory                                             (3,629)         --
      Accounts payable                                         937        (416)
      Deferred revenue                                       1,942          --
      Accrued expenses and other liabilities                  (559)        819
                                                           --------    --------
Net cash (used) by operating activities                     (7,635)     (9,604)
                                                           --------    --------

Cash flows from investing activities:
  Capital expenditures                                        (141)       (249)
  Purchase of marketable securities                        (36,233)     (3,320)
  Proceeds from maturities and sales of
     marketable securities                                  21,789       5,395
  Proceeds from disposal of fixed assets                        40          41
                                                           --------    --------
Net cash (used) provided by investing activities           (14,545)      1,867
                                                           --------    --------
Cash flows from financing activities:
  Net proceeds from issuance of stock and other equity      13,608       4,409
    transactions
  Net proceeds from issuance of stock by subsidiaries       30,362       4,880
  Proceeds from sale/leaseback                                 132         140
  Principal payments of capital lease obligations             (244)       (187)
                                                           --------    --------
Net cash provided by financing activities                   43,858       9,242
                                                           --------    --------
Net change in cash and cash equivalents                     21,678       1,505
Cash and cash equivalents at beginning of period            16,781      11,263
                                                           --------    --------

Cash and cash equivalents at end of period                $ 38,459    $ 12,768
                                                           --------    --------
                                                           --------    --------


         The accompanying notes are an integral part of these unaudited
                       consolidated financial statements.


                                       -5-

<PAGE>


               INTERNEURON PHARMACEUTICALS, INC. AND SUBSIDIARIES
              NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

A.   BASIS OF PRESENTATION:

     The consolidated financial statements included herein have been prepared by
Interneuron Pharmaceuticals, Inc. without audit, pursuant to the rules and
regulations of the Securities and Exchange Commission.  Certain information and
footnote disclosures normally included in financial statements prepared in
accordance with generally accepted accounting principles have been condensed or
omitted pursuant to such rules and regulations.  In the opinion of management,
the accompanying unaudited consolidated financial statements include all
adjustments (consisting only of normal recurring adjustments) necessary to
present fairly the consolidated financial position, results of operations and
cash flows of the Company.  The consolidated financial statements included
herein should be read in conjunction with the audited consolidated financial
statements and the notes thereto included in the Company's Form 10K for the
fiscal year ended September 30, 1995.

     The consolidated financial statements include the accounts of Interneuron
Pharmaceuticals, Inc. ("Interneuron" or the "Company") and its subsidiaries,
Progenitor, Inc. ("Progenitor"), Transcell Technologies, Inc. ("Transcell"), 
Intercardia, Inc. ("Intercardia"), and InterNutria, Inc. ("InterNutria"). All
significant intercompany activity has been eliminated.

B.   SIGNIFICANT ACCOUNTING POLICIES:

     REVENUE RECOGNITION:  Revenue is recognized under agreements when services
are performed or when contractual obligations are met.   Revenues from product
sales are recognized at the later of shipment or satisfaction of performance
obligations.

     INVENTORIES:   Inventories are valued at the lower of cost (first-in,
first-out method) or market.  Costs for drug substance used to manufacture
product for sale were capitalized beginning at the time such product was
recommended for approval by an Advisory Committee of the U.S. Food and Drug
Administration ("FDA").

C.   INVENTORY AND DEFERRED REVENUE:

     Inventory of $3,629,000 at March 31, 1996 consists of dexfenfluramine drug
substance.  American Home Products Corp. ("AHP") has agreed to purchase certain
dexfenfluramine drug substance to be contained in finished Redux
("Dexfenfluramine Capsules") prior to the capsule production process.  Payments
received from AHP for such dexfenfluramine drug substance are reflected as
deferred revenue until the time of sale of Dexfenfluramine Capsules containing
pre-paid dexfenfluramine drug substance  to AHP, at which time the Company will
recognize and include  the appropriate proportionate share of such deferred
revenue in product sales.  As of March 31, 1996, deferred revenue was
$1,942,000, and there were no sales of Dexfenfluramine Capsules to AHP.

D.   INCOME TAXES:

     At March 31, 1996, the Company and its subsidiaries had net operating loss
carryforwards, for tax reporting purposes, of approximately $94 million
available to reduce future federal income


                                       -6-
<PAGE>


taxes.  The use of these net operating loss carry forwards may be subject to
limitation under the change in stock ownership rules of the Internal Revenue
Code and may not be fully available for use on a consolidated basis.

E.   STOCKHOLDERS' EQUITY:

     The Company's Class B Warrants expired on March 15, 1996.  Each Class B
Warrant entitled the holder to purchase one share of Interneuron Common Stock at
a price of $4.75.  During the six month period ended March 31, 1996,
approximately 2,402,000 Class B Warrants were exercised (including 165,000 that
were exercised on a cashless basis by an affiliate of the Company resulting in
the issuance of 138,432 shares of Interneuron Common Stock) resulting in net
proceeds to the Company of approximately $10,625,000 and the issuance of
approximately 2,375,000 shares of Interneuron Common Stock.

     During the six month period ended March 31, 1996, a warrantholder exercised
700,000 warrants pursuant to a cashless exercise provision, resulting in  a net
issuance of 574,984 shares of Common Stock.

     In January 1996, the Company issued 342,792 shares of Common Stock for the
purchase of 20% of the remaining outstanding capital stock of CPEC, Inc.,
("CPEC") not owned by Intercardia (also, see Note F).

     In March 1996, a Registration Statement on Form S-3 was declared effective
relating to the  resale of an aggregate of approximately 3,533,000 shares of
Common Stock held by or issuable to certain selling stockholders primarily in
connection with financing transactions completed during fiscal 1995.  Of these
shares, 399,079 shares were issuable upon the exercise of warrants other than
Class B Warrants.

     In addition to the 37,301,000 shares of Common Stock outstanding at 
March 31, 1996, there were approximately 14,000,000 shares issuable (i) under 
the Company's stock option and stock purchase plans, (ii) upon conversion of 
all authorized, both issued and unissued, shares of preferred stock, (iii) in 
the event the maximum amount of shares are issued upon exercise of put 
protection rights, (iv) pursuant to the various technology acquisition 
transactions, and (v) upon exercise of outstanding warrants.

     The Company and its subsidiaries continue to seek additional financing
(including private placements and initial and follow-on public offerings) and/or
collaborative arrangements.


                                       -7-
<PAGE>

F.   SUBSIDIARIES:

     In December 1995, InterNutria, a wholly-owned subsidiary, acquired from
Walden Laboratories, Inc. ("Walden"), the technology and know-how to produce a
specially formulated dietary supplement for women's use during their pre-
menstrual period called PMS Escape in exchange for $2,400,000, payable in two
installments of Interneuron Common Stock, the first in late 1996 and the second
in late 1997, at the then-prevailing market price.  The Company's Chairman and
certain other parties related to the Company are also stockholders of Walden but
will not receive shares of Interneuron Common Stock from this transaction. The
Company recorded a charge of approximately $2,150,000 in the three month period
ended December 31, 1995 in connection with this transaction.

     In December 1995, Intercardia, Inc., a majority-owned subsidiary
("Intercardia"), executed a Development and Marketing Collaboration and License
Agreement with Astra Merck, Inc.  ("Astra Merck") (the "Astra Merck
Collaboration") to provide for the development and commercialization and
marketing in the U.S. of a twice-daily formulation of bucindolol for the
treatment of congestive heart failure.  Intercardia received $5,000,000 upon
execution of the Astra Merck Collaboration, which was recognized as Contract
Revenue in the first quarter of fiscal 1996, and  may receive additional
payments based upon achievement of certain milestones and royalties based on net
sales of bucindolol in the U.S.  Intercardia has agreed to pay Astra Merck
$10,000,000 in December 1997 and to reimburse Astra Merck for one-third of
certain product launch costs, up to a total of $11,000,000.  In the event
Intercardia elects not to make these payments, royalties payable by Astra Merck
to Intercardia will be substantially reduced.

     In January 1996, Interneuron acquired the remaining 20% of the 
outstanding capital stock of CPEC not owned by Intercardia by issuing an 
aggregate of 342,792 shares of Interneuron's Common Stock to the former CPEC 
minority stockholders.  As a result of this transaction, the Company recorded 
a charge for the purchase of in-process research and development of 
approximately $6,084,000 in the three month period ended March 31, 1996.

     In February 1996, Intercardia completed an initial public offering of
2,530,000 shares of Intercardia common stock at $15.00 per share resulting in
net proceeds of approximately $35,000,000 (the "Intercardia IPO"). Interneuron
purchased 333,333 shares of the Intercardia IPO for a total of approximately
$5,000,000.  Interneuron's ownership in Intercardia's outstanding capital stock
decreased from approximately 88% at September 30, 1995 to approximately 60% as a
result of the Intercardia IPO.  In certain circumstances, Interneuron has the
right to purchase additional shares of Intercardia common stock at fair market
value to provide that Interneuron's equity ownership in Intercardia does not
fall below 51%.  As a result of the Intercardia IPO, put protection rights that
could have caused the Company to issue in June 1998 up to approximately
1,914,000 shares of Interneuron Common Stock expired.  As a result of the
Intercardia IPO and Interneuron's purchase of 333,333 shares thereof,
Interneuron recognized in the three month period ended March 31, 1996, a gain on
its investment in Intercardia of approximately $16,350,000 which has been
recorded in the Company's Additional paid-in capital but not in the Company's
Consolidated Statement of Operations.  The Company also recorded an addition to
minority interest of approximately $13,650,000 as Intercardia continues to be
principally involved in research and development.


                                       -8-

<PAGE>


Item 2.   MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
          RESULTS OF OPERATIONS

     Statements in this form 10-Q that are not descriptions of historical facts
are forward-looking statements that are subject to risks and uncertainties. 
Actual results could differ materially from those currently anticipated due to
a number of factors, including those set forth in the Company's SEC filings
under "Risk Factors."

     The following discussion should be read in conjunction with the unaudited
Consolidated Financial Statements and Notes thereto appearing elsewhere in this
report. Unless the context indicates otherwise, all references to the Company
include Interneuron and its subsidiaries.

LIQUIDITY AND CAPITAL RESOURCES

     At March 31, 1996, the Company had cash, cash equivalents and marketable
securities of $71,110,000, which represents an increase of $36,121,000 from
$34,989,000 at September 30, 1995.  This increase in cash, cash equivalent and
marketable securities is primarily the result of the receipt of  approximately
$30,000,000 of net proceeds to Intercardia, excluding $5,000,000 received from
Interneuron, from the February 1996 Intercardia IPO and approximately
$14,000,000 of net proceeds to Interneuron from the exercise of the Class B
Warrants, options and other warrants,  less cash consumed by operations and
other activities of approximately $8,000,000, including $5,000,000 received by
Intercardia pursuant to the Astra Merck Collaboration

     On May 3, 1996, the Company filed a registration statement with the
Securities and Exchange Commission on Form S-3 relating to a proposed public
offering (the "Proposed Offering") by the Company of 2,500,000 shares of its
Common Stock at a public offering price to be based on the market price of the
Company's Common Stock at the time of the Proposed Offering.  Certain officers
and directors of the Company have granted the underwriters of the Proposed
Offering an option to purchase an aggregate of 375,000 of their shares to cover
over-allotments, if any. A registration statement relating to these securities
has been filed with the Securities and Exchange Commission but has not yet
become effective. These securities may not be sold nor may offers to buy be
accepted prior to the time the registration statement becomes effective. This
report 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.

     On April 29, 1996, Redux received FDA clearance for marketing as a 
prescription drug for the treatment of obesity including weight loss and 
maintenance in patients on a reduced calorie diet who have a body mass index 
("BMI") of greater than or equal to 30 kg/m2 or greater than or equal to 27 
kg/m2 in the presence of other risk factors (e.g., hypertension, diabetes, or 
hyperlipidemia).  Redux is expected to be marketed by the Wyeth-Ayerst division
of AHP.  To supplement AHP's marketing efforts, the Company is developing an 
approximately 30-person sales force to co-promote Redux to certain 
endocrinologists, diabetologists, bariatricians and weight management 
specialists. Although a portion of the Company's co-promotion costs are 
expected to be funded by AHP, the Company will likely incur substantial costs 
to develop the Company's sales force and in connection with the launch of 
Redux, prior to receipt of any revenues.  These costs include build-up of 
Redux inventories, which are being manufactured for the Company on a contract 
basis by Boehringer Ingelheim Pharmaceuticals, Inc. ("Boehringer").  The 
Company's agreement with Servier requires launch to occur within six months 
of approval and the Company is

                                      -9-

<PAGE>

purchasing inventories of Redux in preparation for launch.  Inventory levels
depend to a large extent on forecasts provided by AHP.  The Company's contract
manufacturing agreement with Boehringer requires the Company to purchase a
specified annual minimum quantity of capsules at a cost of approximately
$423,000 per year.  At March 31, 1996, the Company had inventory of
dexfenfluramine drug substance totaling $3,629,000 and deferred revenue from
AHP for their purchase from the Company of such dexfenfluramine drug substance
of $1,942,000.

     The Company is highly dependent upon AHP to market Redux.  The Company's
agreements with AHP provide for base royalties to the Company of 11.5% of AHP's
net sales (equal to the royalty required to be paid by the Company to Les
Laboratories Servier ("Servier"), and for additional royalties, ranging from a
minimum of 5% of the first $50 million of net sales if dexfenfluramine is not
descheduled to a maximum of 12% of net sales over $200 million if
dexfenfluramine is descheduled and the Company does not manufacture Redux
(subject to a 50% reduction if generic drug competition exceeds a 10% market
share percentage in two consecutive quarters). There can be no assurance that
these sales levels will be achieved.  In connection with the receipt of FDA
marketing clearance, the Company is entitled to a $500,000 milestone payment
from AHP and is entitled to an additional $6,000,000 payment and a $3,500,000
equity investment if dexfenfluramine is descheduled within 12 months from the
FDA approval date.

     Included in the FDA-approved labeling for Redux are references to certain 
risks which may be associated with dexfenfluramine and which were highlighted 
during the FDA's review of the drug.  One issue relates to whether there is an 
association between anorectic drugs, including dexfenfluramine, and the 
development of PPH, a rare but serious lung disorder.  In the general 
population, the yearly occurrence of PPH is estimated to be about 1-2 cases 
per million persons.  An epidemiologic study conducted in Europe examining 
risk factors for PPH showed that among other factors, weight reduction drugs 
including dexfenfluramine, systematic hypertension, and obesity itself were 
associated with a higher risk of PPH.  The study estimated the yearly 
occurrence to be approximately 18 cases per million for patients taking 
anorexigen (anti-obesity) drugs for greater than three months duration.  In the
study, obesity itself was associated with double the risk of developing PPH.  
Although the Company believes that the benefits of weight loss by obese patients
meeting the labeling criteria for Redux outweigh the risk of developing PPH, the
occurrence or the perceived likelihood of occurrence of PPH by patients taking
Redux may adversely affect the market for the drug as well as the Company's 
business, financial condition and results of operations.  A second issue raised
by the FDA was whether dexfenfluramine is associated with certain neurochemical
changes in the brain.  Certain studies related to this issue, conducted by third
parties, purport to show that very high doses of dexfenfluramine cause prolonged
serotonin depletion in certain animals, which some researchers believe is an 
indication of neurotoxicity.  The Company presented data relating to the lack of
neurocognitive effects in patients taking Redux and believes that, as 
demonstrated in human trials, these animal studies are clinically irrelevant to
humans because of pharmacokinetic differences between animals and humans 
(resulting in much higher brain concentrations of dexfenfluramine and its active
metabolite in certain animals than in humans) and because of the high dosages 
used in animal studies.  The Company has agreed with the FDA to conduct a 
Phase 4, or post marketing, study of Redux.  Although the precise nature of this
study has not been determined, Interneuron expects the Phase 4 study to include
a double-blind placebo-controlled trial involving approximately 200 patients 
intended to further evaluate long-term neurocognitive function, using 
standardized neuro-psychological tests, in patients taking Redux.  Approximately
50% of the costs of the Phase 4 study, which is expected to be conducted over an
approximately two to three-year period, is expected to be paid by AHP. Adverse
results, if any, of this study may adversely affect the market of the drug and
the Company.

                                      -10-
<PAGE>

     In February 1996, Intercardia completed  the Intercardia IPO, an initial 
public offering of 2,530,000 shares of Intercardia common stock at $15.00 per 
share resulting in net proceeds of approximately $35,000,000. Interneuron 
purchased 333,333 shares of the Intercardia IPO for a total of approximately 
$5,000,000. Interneuron's ownership in Intercardia's outstanding capital 
stock decreased from approximately 88% at September 30, 1995 to approximately 
60% as a result of  the Intercardia IPO.  In certain circumstances, 
Interneuron has the right to purchase additional shares of Intercardia common 
stock at fair market value to provide that Interneuron's equity ownership in 
Intercardia does not fall below 51%.  As a result of the Intercardia IPO, put 
protection rights that could have caused the Company to issue in June 1998 up 
to approximately 1,914,000 shares of Interneuron Common Stock expired. As a 
result of the Intercardia IPO and Interneuron's purchase of 333,333 shares 
thereof, Interneuron recognized in the three month period ending March 31, 
1996, a gain on its investment in Intercardia of approximately $16,350,000 
which has been recorded directly in the Company's Additional paid-in capital 
but not in the Company's Consolidated Statement of Operations.  The Company 
also recorded an addition to minority interest of approximately $13,650,000.  
Intercardia's funds are not generally available to Interneuron.

     Intercardia is contractually committed to provide certain support to the
BEST Study for bucindolol, which commenced in June 1995 and which is sponsored
by the NIH and the VA.  The NIH and VA have committed up to $15,750,000 primary
funding for the BEST study, with specific levels of NIH and VA funding to be
based upon patient enrollment milestones.  Intercardia is committed to provide
up to $2,000,000 during the course of the BEST Study, of which $750,000 had been
paid as of March 31, 1996, as well as drug supplies and monitoring costs of the
study expected to aggregate an additional $2,500,000. In December 1995,
Intercardia received $5,000,000 upon execution of the Astra Merck Collaboration,
which obligates Astra Merck to fund certain future U.S. development, marketing
and manufacturing costs and to assume Intercardia's funding obligation for the
BEST Study,  including the drug supplies and monitoring costs, and royalty
obligation to Bristol-Myers Squibb Company.  Intercardia will be entitled to
royalties based on net sales by Astra Merck.  Intercardia has agreed to pay
Astra Merck $10,000,000 in December 1997 and to reimburse Astra Merck for one-
third of certain product launch costs, up to a total of $11,000,000.  In the
event Intercardia elects not to make these payments, royalties payable by Astra
Merck to Intercardia will be substantially reduced.

     As additional consideration in connection with Intercardia's acquisition of
80% of CPEC in September, 1994, Intercardia agreed to make two additional
purchase price payments, each equal to 75,000 shares of Interneuron Common
Stock, subject to adjustment based upon the fair market value at the time of
issuance, upon the achievement of milestones relating to the filing and approval
of an NDA for bucindolol.  The Company may incur noncash charges in connection
with these issuances, based upon their fair market value at the time of
issuances, of a minimum of $750,000 and a maximum of $1,875,000.

     The Company's principal expenditures are for product development and
clinical trials, including expenses required under collaborative agreements. In
particular, the Company is performing a Phase 3 clinical trial to confirm
whether treatment of stroke with citicoline limits infarct size.  The Company
also intends to commence a second pivotal Phase 3 clinical trial and related
studies for citicoline in 1996.  The two Phase 3 clinical trials are expected to
proceed into fiscal 1997.   The costs of the clinical trials and the preparation
of the NDA are estimated to aggregate approximately $13,000,000.  The Company is
unable to predict with certainty the costs 


                                      -11-
<PAGE>

of related studies which will depend upon FDA requirements. Further, as the
Company currently intends to market citicoline directly, additional funds will
be required for manufacturing, distribution and selling efforts.  The Company
will also incur substantial development costs in connection with Phase 2/3
clinical trials on pagoclone expected to commence in 1996, and on other products
under development including those which may be acquired by the Company in the
future.

     In December 1995, the Company acquired from Walden technology and know-how
subsequently resulting in the PMS Escape product in exchange for $2,400,000,
payable in two installments of Interneuron Common Stock, the first in late 1996
and the second in late 1997, at the then-prevailing market price.  InterNutria
commenced a test-launch of PMS Escape in a regional market in March 1996 while
continuing the clinical evaluation of the product.  The costs related to this
test-launch are estimated to be approximately $2,000,000 in fiscal 1996.
     
     As of March 31, 1996, the Company and its subsidiaries were party to
various consulting agreements and employment agreements with officers and
directors containing minimum aggregate annual payments of approximately
$1,700,000. Certain employment agreements are subject to additional bonuses and
annual increases as may be determined by the Company's Board of Directors.

     Interneuron is currently funding operations of Progenitor, Transcell and
InterNutria.  Expenses of the Subsidiaries, including those required under
collaboration agreements, constitute a significant part of the Company's overall
expenses.

     The Company's strategy includes evaluation of various technology or product
acquisition and/or financing opportunities (including private placements and
initial and follow-on equity offerings) and the Company and certain of its 
subsidiaries are currently engaged in discussions relating to such 
opportunities, although it has no agreements or commitments relating to any 
particular acquisition.  Any such initiatives may involve the issuance of 
securities of Interneuron or its subsidiaries and/or financial commitments to
fund product development.

     The Company believes it has sufficient cash for currently planned
expenditures in fiscal 1996.  While the Company is seeking additional equity
funding through the Proposed Offering,  it may seek additional funds through
other equity and/or debt financings and corporate collaborations to provide
working capital financing and funding for new business opportunities and future
growth.  In addition, certain subsidiaries are exploring various financings
(including issuances of securities in public offerings or private placements),
collaborations or business combinations in order to enable these subsidiaries to
pursue development of their technologies.  If such efforts are not successful,
certain activities at these subsidiaries may be reduced.  Although Interneuron
may acquire additional equity in subsidiaries through participation in
financings or conversion of inter-company debt, equity financings by a
subsidiary will likely reduce Interneuron's percentage ownership of that
subsidiary and funds held by the subsidiaries will generally not be available 
to Interneuron.  The Company's goal is for its subsidiaries to establish
independent operations and financing through corporate alliances, third-party
financings, mergers or other business combinations, with Interneuron generally
retaining an ongoing equity interest.  The nature of any such transaction is
expected to vary depending on the business and capital needs of each subsidiary
and the state of development of their respective technologies or products. 


                                      -12-
<PAGE>




RESULTS OF OPERATIONS

Total revenues increased by $1,255,000 to $1,566,000 during the three month
period ended March 31, 1996 from $311,000 in  the three month period ended March
31, 1995 and increased by $6,851,000 to $7,381,000 in the six month period ended
March 31, 1996 from $530,000 in six month period ended March 31, 1995. The
increase in contract revenue in the fiscal 1996 three and six month periods
reflects a $500,000 milestone payment received by Progenitor in January 1996
from Chiron, grant revenue received by Progenitor and $5,000,000 received by
Intercardia in December 1995 pursuant to the Astra Merck Collaboration.
Increased investment income in the three and six month periods resulted from
higher invested cash balances resulting primarily from Intercardia's net
proceeds from the February 1996 Intercardia IPO and the December 1995 payment
from Astra Merck and Interneuron's net proceeds from the exercise of the Class B
Warrants and other options and warrants.

Total costs and expenses increased by $8,611,000, or 161%, to $13,959,000 
during the three month period ended March 31, 1996 from $5,438,000 during the 
three month period ended March 31, 1995 and increased by $11,204,000, or 104%,
to $21,984,000 during the six month period ended March 31, 1996 from $10,780,000
during the six month period ended March 31, 1995.  During the six month period
ended March 31, 1996, the Company incurred charges aggregating $8,234,000, 
equal to 73% of the increased costs and expenses (of which $6,084,000 was 
incurred in the three month period ended March 31, 1996), for the purchase of 
in-process research and development.  These charges (of which $8,098,000 were
non-cash) related to (i) the Company's January 1996 acquisition of the remaining
20% of CPEC not owned by Intercardia in exchange for the issuance of 342,792
shares of Interneuron common stock and (ii) the Company's November 1995 
acquisition of assets and technology relating to a dietary supplement for use 
by women during their pre-menstrual period in exchange for the issuance of 
$2,400,000 of Interneuron Common Stock, payable in equal installments in late 
1996 and 1997.

Research and development expenses increased by $31,000, or 1%, to $3,599,000 
in the three month period ended March 31, 1996 from $3,568,000 during the 
three month period ended March 31, 1995 and decreased by $552,000, or 8%, to 
$6,726,000 in the six month period ended March 31, 1996 from $7,278,000 during 
the six month period ended March 31,1995. During the 1996 three and six month
periods, research and development expenses relating to the citicoline Phase 3
clinical trial, which completed patient enrollment prior to the beginning of 
fiscal 1996, as well as various adjunct studies relating to citicoline during
the first fiscal quarter of 1995, decreased compared to citicoline-related 
expenses incurred in the fiscal 1995 periods. Offsetting these decreases were 
costs incurred by Intercardia related to research on catalytic antioxidant small
molecules and the establishment of a development staff to manage the development
of bucindolol and other technologies, and costs incurred by InterNutria 
relating to the development of its products. Costs relating to certain
dexfenfluramine clinical activities incurred during the fiscal 1995 periods were
replaced by fiscal 1996 costs incurred to support the Company's preparation for
the November 1995 Advisory Committee meeting and subsequent efforts to secure

                                      -13-
<PAGE>

FDA marketing clearance  for Redux. The Company has begun to incur expenses
relating to the commencement of a second Phase 3 clinical trial for citicoline
which is expected to continue through fiscal 1997.

Selling, general and administrative expenses increased by $2,496,000, or 
140%, to $4,276,000 in the three month period ended March 31, 1996 from 
$1,780,000 during the three month period ended March 31, 1995 and increased 
by $3,522,000, or 101%, to $7,024,000 during the six month period ended March 
31, 1996 from $3,502,000 during the six month period ended March 31,1995. 
These increases reflect the addition of management personnel by Intercardia 
and InterNutria subsequent to the end of the fiscal 1995 periods, and costs 
relating to the commencement by InterNutria of a regional test launch of PMS 
Escape in the three month period ended March 31, 1996 and  related sales, 
marketing and public relations expenses. Selling, general and administrative 
expenses during the three month period ended March 31, 1996 included 
severance and related charges incurred by Transcell relating to certain 
management changes. In preparation  for the launch of Redux, the Company has 
incurred costs related to the establishment of a sales force to co-promote 
Redux, including recruiting costs. The Company has also incurred additional 
general and administrative costs including increased wages and benefits  and  
insurance premiums. Selling, general and administrative expenses will 
increase as the Company hires sales representatives to co-promote and sell 
Redux, although a portion of such sales force costs is expected to be paid by 
AHP,  and for the test launch of PMS Escape.

As a result of the foregoing, the Company incurred net losses of ($11,961,000)
and ($15,145,000), or ($.34) and ($.44) per share, for the three and six month
periods ended March 31, 1996, respectively, compared to net losses of
($4,951,000) and ($10,164,000), or ($.16) and ($.34) per share, for the three
and six month periods ended March 31, 1995. Weighted average common shares
increased in the fiscal 1996 periods reflecting additional equity issuances.

Activities of the subsidiaries continue to represent a significant percentage 
of the Company's consolidated expenses and represented 48% (including 
$2,150,000 for the purchase of in-process research and development by 
InterNutria) and 46% of the consolidated expenses in the six month periods 
ended March 31, 1996 and 1995, respectively. While the rate of spending by 
Progenitor and Transcell (except for the severance and related charges 
relating to the Transcell management changes incurred in the three month 
period ended March 31, 1996) was essentially unchanged in the fiscal 1996 
periods, increased spending by the subsidiaries is expected to increase the 
total amount of expenses pertaining to the subsidiaries in fiscal 1996.

The Company's strategy includes evaluation of various technology or product 
acquisition and/or financing opportunities and the Company is currently 
engaged in discussions relating to such opportunities. Any such initiatives 
may involve the issuance of shares of Interneuron's Common Stock and/or 
financial commitments to fund product development, either of which may 
adversely affect the Company's consolidated financial condition or results of 
operations.

                                      -14-
<PAGE>

PART II - OTHER INFORMATION

Item 4.   SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

     The Company's annual meeting of stockholders was held on 
February 21, 1996.  At the meeting (I) all ten director nominees were elected;
and (ii) the appointment of Coopers & Lybrand L.L.P. as the independent auditors
was ratified.

(I)  The following Directors were elected for a one-year term by the votes
indicated:

Lindsay A. Rosenwald, M.D., 26,413,407 for, 117,688 against; Glenn L. Cooper,
M.D., 26,413,407 for, 117,688 against; Harry J. Gray, 26,298,337 for, 232,758
against; Alexander M. Haig, Jr., 26,508,557 for, 22,538 against; Peter Barton
Hutt, 26,519,107 for, 11,988 against; Malcolm Morville, Ph.D., 26,519,107 for,
11,988 against; Robert K. Mueller, 26,518,307 for, 12,788 against; Lee J.
Schroeder, 26,518,997 for, 12,088 against; David B. Sharrock, 26,413,407 for,
117,688 against; Richard Wurtman, M.D., 26,413,407 for, 117,688 against.

(ii) The appointment of Coopers & Lybrand L.L.P. was ratified by a vote of
26,496,345 for, 15,799 against, and 18,951 abstain.


                                       15
<PAGE>

PART II

Item 6.        EXHIBITS AND REPORTS ON FORM 8-K

(a)            Exhibits

     3.4       -  Restated Certificate of Incorporation of Registrant (17)
     3.5       -  By-Laws of Registrant (1)
     4.4       -  Certificate of Designation establishing Series C Preferred
                     Stock (17)
     4.6       -  Form of Registrant Warrant issued in subsidiary private
                  placement (25)
     4.7       -  Form of Registrant Warrant to be issued to Paramount Capital,
                  Inc., D.H. Blair & Co., Inc. or designees (25)
     10.5 (a)  -  Consultant and Non-competition Agreement between the
                  Registrant, Richard Wurtman, M.D. (34)
     10.5 (b)  -  Consultant and Non-competition Agreement between InterNutria,
                  Inc. and Judith Wurtman, Ph.D. (34)            
     10.6      -  Assignment of Invention and Agreement between Richard
                  Wurtman, M.D., Judith Wurtman and the Registrant (1)
     10.7      -  Management Agreement between the Registrant
                  and Lindsay Rosenwald, M.D. (1)
     10.9(a)   -  Restated and Amended 1989 Stock Option Plan  (7)
     10.10     -  Form of Indemnification Agreement (1)
     10.11     -  Restated Amendment to MIT Option Agreement (1)
     10.12(a)  -  Patent and Know-How License Agreement between the
                     Registrant and Les Laboratoires Servier ("Servier") dated
                     February 7, 1990 ("License Agreement") (1)
     10.12(b)  -  Revised Appendix A to License Agreement (1)
     10.12(c)  -  Amendment Agreement between Registrant and Servier, Orsem and
                  Oril, Produits Chimiques dated November 19,1992(3)(12)
     10.12(d)  -  Amendment Agreement dated April 28, 1993 between Registrant
                  and Servier (16) 
     10.12 (e) -  Consent and Amendment Agreement among Servier, American Home
                     Products Corp. and Registrant. (34)
     10.13     -  Trademark License Agreement between the  Registrant and Orsem
                  dated February 7, 1990 (1)
     10.14     -  Supply Agreement between the Registrant and Oril Products
                  Chimiques dated February 7, 1990 (1)(3)   
     10.15(a)  -  Form of Indemnification Agreement between the Registrant and
                  Alexander M. Haig, Jr.  (1)
     10.16     -  Assignment of Invention by Richard Wurtman, M.D. (1)


                                      -16-
<PAGE>

     10.22(a)  -  License Agreement dated January 15, 1993, as amended, between
                  the Registrant and Grupo Ferrer (3)(16) 
     10.25     -  License Agreement between the Registrant and the
                  Massachusetts    Institute of Technology (4)
     10.28     -  Letter Agreement between the Registrant and  Bobby W.
                  Sandage, Jr., Ph.D. (7)
     10.29     -  Amended Lease dated December 12, 1991 for  Registrant's
                  offices in Lexington, Massachusetts (7)
     10.29(a)  -  First Amendment to Lease dated as of October 14, 1994 between
                  Registrant and Ledgemont Realty Trust (25)
     10.30     -  License Agreement dated January 1, 1992 between the Trustees
                  of Princeton University and the Registrant (3)(8)
     10.31     -  Research Agreement dated as of July 1, 1991  between the
                  Registrant and the Trustees of   Princeton University (3)(8)
     10.32     -  Consulting Agreement dated as of July 1, 1991 between the
                  Registrant and Daniel Kahne, Ph.D. (3)(8)
     10.33     -  License Agreement dated January 28, 1992 between Ohio
                  University, The Castle Group, Inc. and Scimark Corporation
                  (assigned to Progenitor, Inc.) (3)(8)
     10.34     -  Sponsored Research Agreement between Scimark  Corporation
                  (assigned to Progenitor, Inc.) and Ohio University (3)(8)     
                  
     10.34(a)  -  Letter Amendment between Progenitor, Inc. and  Ohio
                  University (18)
     10.35     -  Technology License Contract dated December 18, 1991 between
                  the Registrant and the Mayo  Foundation for Medical Education
                  and Research (3) (8)
     10.36     -  Exclusive License Agreement dated February 24, 1992 between
                  the Registrant and Purdue Research Foundation (9)
     10.37     -  License Agreement dated as of February 15, 1992 between the
                  Registrant and Massachusetts Institute of Technology (9)
     10.39     -  Employment Agreement between Transcell Technologies, Inc. and
                  Elizabeth Tallet dated November 11, 1992 and Guarantee by 
                  Registrant (13)
     10.40     -  Patent and Know-How Sublicense and Supply Agreement between
                  Registrant and American Cyanamid Company dated November 19,
                  1992 (3)(12)
     10.41     -  Equity Investment Agreement between Registrant and American
                  Cyanamid Company dated November 19, 1992 (12)
     10.42     -  Trademark License Agreement between Registrant and American
                  Cyanamid Company dated November 19, 1992 (12)
     10.43     -  Consent Agreement between Registrant and Servier dated
                  November 19,1992 (12)
     10.44(a)  -  Termination Letter to Registrant from Veryfine Products,
                  Inc., dated October 30, 1995 (34)
     10.45     -  Agreement between Registrant and Parexel International
                  Corporation dated October 22, 1992 (as of July 21, 1992) (3)
                  (14)
     10.46     -  License Agreement dated February 9, 1993 between the
                  Registrant and Massachusetts Institute of Technology (3)(15)
     10.47     -  Sublease between Enichem America and Transcell Technologies,
                  Inc. including guarantee by the Registrant (15)
     10.49     -  License Agreement between Registrant and Elan Corporation,
                  plc dated September 9, 1993 (3)(18)
     10.50     -  License Agreement between Transcell Technologies, Inc. and
                  Princeton University dated October 14, 1993 (3)(18)


                                      -17-
 
<PAGE>


      10.51     -    Letter Agreement between the Registrant and Mark S. Butler
                     (18)
      10.52     -    License Agreement dated February 18, 1994 between
                     Registrant and Rhone-Poulenc Rorer, S.A. (20)
      10.54     -    Form of Purchase Agreement dated as of February 24, 1994
                     (20)
      10.54(a)  -    Form of Amendment to Purchase Agreement (20)
      10.55     -    Patent License Agreement between Registrant and
                     Massachusetts Institute of Technology dated March 1, 1994
                     (20)
      10.56     -    License Agreement between Progenitor, Inc. and Albert
                     Einstein College of Medicine of Yeshiva University dated
                     as of February 1,1994 (20)
      10.57     -    Employment Letter dated February 28, 1994 between the
                     Registrant and Thomas F. Farb (21)
      10.58     -    Master Equipment Lease including Schedules and Exhibits
                     between Phoenix Leasing and Registrant (agreements for
                     Transcell and Progenitor are substantially identical),
                     with form of continuing guarantee for each of Transcell
                     and Progenitor (22)
      10.59     -    Exhibit D to Agreement between Registrant and Parexel
                     International Corporation dated as of March 15, 1994.
                     (3)(22)
      10.60(a)  -    Acquisition Agreement dated as of May 13, 1994 among the
                     Registrant, Intercardia, Inc., Cardiovascular Pharmacology
                     Engineering Consultants, Inc. (CPEC), Myocor, Inc. and the
                     sellers named therein (23)
      10.60(b)  -    Amendment dated June 15, 1994 to the Acquisition Agreement
                     (23)
      10.60-C-  -    Form of Consulting Agreement between Intercardia, Inc.,
                     CPEC and Myocor, Inc.(23)
      10.61     -    License Agreement dated December 6, 1991 between Bristol-
                     Myers Squibb and CPEC, as amended (3)(23)
      10.61(a)  -    Letter Agreement dated November 18, 1994 between CPEC and
                     Bristol-Myers Squibb (25)
      10.62     -    Lease Agreement between Thomas R. Eggers and  Progenitor,
                     Inc. dated as of November 1994 with Registrant guaranty
                     (25)
      10.63     -    Form of Stock Purchase Agreement dated December 15, 1994
                     (25)
      10.64     -    Form of Investor Rights Agreement among Progenitor,
                     Transcell, Registrant and each investor in the subsidiary
                     private placement (25)
      10.64(a)  -    Form of Investor Rights Agreement among Intercardia, the
                     Registrant and each investor in the Intercardia private
                     placement (25)
      10.65     -    1994 Long-Term Incentive Plan (25)
      10.67     -    Employment Agreement between Intercardia and Clayton I.
                     Duncan with Registrant guarantee (25)
      10.67(a)  -    Amendment to Employment Agreement between Intercardia,
                     Inc. and Clayton I. Duncan (27)
      10.68     -    Interneuron Pharmaceuticals, Inc. 1995 Employee Stock
                     Purchase Plan, as amended (27)
      10.69     -    Office Lease, dated April 24, 1995 between Intercardia,
                     Inc. and Highwoods/Forsyth Limited Partnership, with
                     Registrant Guaranty (27)
      10.70 (a) -    License and Collaboration Agreement by and between
                     Progenitor, Inc., and Chiron Corporation dated March 31,
                     1995 (3) (30)
      10.71     -    Securities Purchase Agreement dated June 2, 1995 between
                     the Registrant and Reliance  Insurance Company, including
                     Warrant and exhibits (29)


                                         -18-

<PAGE>

      10.72     -    Sponsored Research and License Agreement dated as of May
                     1, 1995 between Progenitor and Novo Nordisk (3) (30)
      10.73     -    Form of Stock Purchase Agreement dated as of June 28, 1995
                     (31)
      10.74     -    Securities Purchase Agreement dated as of August 16, 1995
                     between the Registrant and BT Holdings (New York), Inc.,
                     including Warrant issued to Momint (nominee of BT
                     Holdings) (32)
      10.75     -    Stock Purchase Agreement dated as August 23, 1995 between
                     the Registrant and Paresco, Inc. (32)
      10.76     -    Stock Purchase Agreement dated as of September 15, 1995
                     between the Registrant and Silverton International Fund
                     Limited (32)
      10.77     -    Subscription Agreement dated September 21, 1995, as of
                     August 31, 1995, including Registration Rights Agreement
                     between Registrant and GFL Advantage Fund Limited. (32)
      10.78     -    Contract Manufacturing Agreement dated November 20,1995
                     between Registrant and Boehringer Ingelheim
                     Pharmaceuticals, Inc. (3)(34)
      10.79     -    Development and Marketing Collaboration and License
                     Agreement  between Astra Merck, Inc., Intercardia, Inc.
                     and CPEC, Inc., dated December 4, 1995. (33)
      10.80     -    InterCompany Services Agreement between Registrant and
                     Intercardia, Inc. (33)
      10.81     -    Asset Purchase Agreement dated November 14, 1995 among
                     Registrant, InterNutria, Inc., and Walden Laboratories,
                     Inc. (34)
      10.82     -    Employment Agreement between Registrant and Glenn L.
                     Cooper,  M.D. dated April 30, 1996 effective as of May 13,
                     1996 (37)
      23   -         Consent of Coopers & Lybrand L.L.P. (34)
      27   -         Financial Data Schedule
- ---------------------------
(1)   Incorporated by reference to the Registrant's registration statement on
      Form S-1 (File No. 33-32408) declared effective on March 8, 1990.
(3)   Confidential Treatment requested for a portion of this Exhibit.
(4)   Incorporated by reference to the Registrant's Annual Report on Form 10-K
      for the year ended September 30, 1990.
(7)   Incorporated by reference to Post-Effective Amendment No. 2 to the
      Registrant's registration statement on Form S-1 (File No. 33-32408) filed
      December 18, 1991.
(8)   Incorporated by reference to the Registrant's Quarterly Report on Form
      10-Q for the three months ended December 31, 1991.
(9)   Incorporated by reference to the Registrant's Quarterly Report on Form
      10-Q for the three months ended March 31, 1992.
(12)  Incorporated by reference to the Registrant's Form 8-K dated November 30,
      1992.
(13)  Incorporated by reference to Post-Effective Amendment No. 5 to the
      Registrant's Registration Statement on Form S-1 (File No. 33-32408) filed
      on December 21, 1992.
(14)  Incorporated by reference to the Registrant's Annual Report on Form 10-K
      for the fiscal year ended September 30, 1992.
(15)  Incorporated by reference to the Registrant's Quarterly Report on Form
      10-Q for the three months ended December 31, 1992
(16)  Incorporated by reference to the Registrant's Quarterly Report on Form
      10-Q for the six months ended March 31, 1993
(17)  Incorporated by reference to the Registrant's Quarterly Report on Form
      10-Q for the nine months ended June 30, 1993


                                         -19-


<PAGE>

(18)  Incorporated by reference to the Registrant's Annual Report on Form 10-K
      for the fiscal year ended September 30, 1993
(20)  Incorporated by reference to the Registrant's Registration Statement on
      Form S-3 or Amendment No. 1 (File no. 33-75826)
(21)  Incorporated by reference to the Registrant's Form 8-K dated March 31,
      1994
(22)  Incorporated by reference to the Registrant's Quarterly Report on Form
      10-Q for the six months ended March 31, 1994
(23)  Incorporated by reference to the Registrant's Form 8-K dated June 20,
      1994
(25)  Incorporated by reference to the Registrant's Annual Report on Form 10-K
      for the fiscal year ended September 30, 1994
(27)  Incorporated by reference to the Registrant's Quarterly Report on From
      10-Q for the six months ended March 31, 1995
(29)  Incorporated by reference to the Registrant's Quarterly Report on Form 8-
      K dated June 2, 1995
(30)  Incorporated by reference to the Registrant's Quarterly Report on Form 8-
      K dated May 16, 1995; Exhibit 10.70 (a) supersedes Exhibit 10.70.
(31)  Incorporated by reference to Registrant's Quarterly Report on Form 10-Q
      for the nine months ended June 30, 1995.
(32)  Incorporated by referring to Registrant's Report on Form 8-K dated August
      16, 1995.
(33)  Incorporated by reference to Registration Statement filed on Form S-1
      (No. 33-80219) by Intercardia, Inc. on December 8, 1995.
(34)  Incorporated by reference to Registrant's Annual Report on Form 10-K for
      the fiscal year ended September 30, 1995.
(36)  Incorporated by reference to Amendment No. 1 to Registrant's Registration
      Statement on Form S-3 (File No. 333-1273) filed March 15, 1996.
(37)  Incorporated by reference to Registrant's Registration Statement on Form
      S-3 (File No. 333-03131) filed May 3, 1996

(b)   Reports on Form 8-K
      During the three month period ended March 31, 1996, the Company filed
      reports on Form 8-K dated January 18, 1996, February 7, 1996 and March
      22, 1996, and a report on Form 8-K/A dated February 20, 1996.


                                         -20-

<PAGE>

                                      SIGNATURES


      Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.


                             INTERNEURON PHARMACEUTICALS, INC.



                             By: /s/Glenn L. Cooper
                                 -------------------------------------
                                  Glenn L. Cooper, M.D., President
                                  and Chief Executive Officer
                                  (Principal Executive Officer)

Date: May 10, 1996

                             By: /s/Thomas Farb
                                 -------------------------------------
                                  Thomas F. Farb,
                                  Executive Vice President, Finance
                                  Chief Financial Officer and Treasurer
                                  (Principal Financial and Accounting
                                  Officer)


                                         -21-

<PAGE>

                                    EXHIBIT INDEX

      3.4       -    Restated Certificate of Incorporation of Registrant (17)
      3.5       -    By-Laws of Registrant (1)
      4.4       -    Certificate of Designation establishing Series C Preferred
                     Stock (17)
      4.6       -    Form of Registrant Warrant issued in subsidiary private
                     placement (25)
      4.7       -    Form of Registrant Warrant to be issued to Paramount
                     Capital, Inc., D.H. Blair & Co., Inc. or designees (25)
      10.5 (a)  -    Consultant and Non-competition Agreement between the
                     Registrant, Richard Wurtman, M.D. (34)
      10.5 (b)  -    Consultant and Non-competition Agreement between
                     InterNutria, Inc. and Judith Wurtman, Ph.D. (34)
      10.6      -    Assignment of Invention and Agreement between Richard
                     Wurtman, M.D., Judith Wurtman and the Registrant (1)
      10.7      -    Management Agreement between the Registrant and Lindsay
                     Rosenwald, M.D. (1)
      10.9(a)   -    Restated and Amended 1989 Stock Option Plan  (7)
      10.10     -    Form of Indemnification Agreement (1)
      10.11     -    Restated Amendment to MIT Option Agreement (1)
      10.12(a)  -    Patent and Know-How License Agreement between the
                     Registrant and Les Laboratoires Servier ("Servier") dated
                     February 7, 1990 ("License Agreement") (1)
      10.12(b)  -    Revised Appendix A to License Agreement (1)
      10.12(c)  -    Amendment Agreement between Registrant and Servier, Orsem
                     and Oril, Produits Chimiques dated November 19,1992(3)(12)
      10.12(d)  -    Amendment Agreement dated April 28, 1993 between
                     Registrant and Servier (16)
      10.12(e)  -    Consent and Amendment Agreement among Servier, American
                     Home Products Corp. and Registrant. (34)
      10.13     -    Trademark License Agreement between the  Registrant and
                     Orsem dated February 7, 1990 (1)
      10.14     -    Supply Agreement between the Registrant and Oril Products
                     Chimiques dated February 7, 1990 (1)(3)
      10.15(a)  -    Form of Indemnification Agreement between the Registrant
                     and Alexander M. Haig, Jr.  (1)
      10.16     -    Assignment of Invention by Richard Wurtman, M.D. (1)
      10.22(a)  -    License Agreement dated January 15, 1993, as amended,
                     between the Registrant and Grupo Ferrer (3)(16)
      10.25     -    License Agreement between the Registrant and the
                     Massachusetts Institute of Technology (4)
      10.28     -    Letter Agreement between the Registrant and  Bobby W.
                     Sandage, Jr., Ph.D. (7)
      10.29     -    Amended Lease dated December 12, 1991 for  Registrant's
                     offices in Lexington, Massachusetts (7)
      10.29(a)  -    First Amendment to Lease dated as of October 14, 1994
                     between Registrant and Ledgemont Realty Trust (25)
      10.30     -    License Agreement dated January 1, 1992 between the
                     Trustees of Princeton University and the Registrant (3)(8)
      10.31     -    Research Agreement dated as of July 1, 1991 between the
                     Registrant and the Trustees of Princeton University (3)(8)

<PAGE>

      10.32     -    Consulting Agreement dated as of July 1, 1991 between the
                     Registrant and Daniel Kahne, Ph.D. (3)(8)
      10.33     -    License Agreement dated January 28, 1992 between Ohio
                     University, The Castle Group, Inc. and Scimark Corporation
                     (assigned to Progenitor, Inc.) (3)(8)
      10.34     -    Sponsored Research Agreement between Scimark Corporation
                     (assigned to Progenitor, Inc.) and Ohio University (3)(8)

      10.34(a)  -    Letter Amendment between Progenitor, Inc. and Ohio
                     University (18)
      10.35     -    Technology License Contract dated December 18, 1991
                     between the Registrant and the Mayo Foundation for
                     Medical Education and Research (3)(8)
      10.36     -    Exclusive License Agreement dated February 24, 1992
                     between the Registrant and Purdue Research Foundation (9)
      10.37     -    License Agreement dated as of February 15, 1992 between
                     the Registrant and Massachusetts Institute of Technology
                     (9)
      10.39     -    Employment Agreement between Transcell Technologies, Inc.
                     and Elizabeth Tallet dated November 11, 1992 and Guarantee
                     by  Registrant (13)
      10.40     -    Patent and Know-How Sublicense and Supply Agreement
                     between Registrant and American Cyanamid Company dated
                     November 19, 1992 (3)(12)
      10.41     -    Equity Investment Agreement between Registrant and
                     American Cyanamid Company dated November 19, 1992 (12)
      10.42     -    Trademark License Agreement between Registrant and
                     American Cyanamid Company dated November 19, 1992 (12)
      10.43     -    Consent Agreement between Registrant and Servier dated
                     November 19,1992 (12)
      10.44(a)  -    Termination Letter to Registrant from Veryfine Products,
                     Inc., dated October 30, 1995 (34)
      10.45     -    Agreement between Registrant and Parexel International
                     Corporation dated October 22, 1992 (as of July 21, 1992)
                     (3) (14)
      10.46     -    License Agreement dated February 9, 1993 between the
                     Registrant and Massachusetts Institute of Technology
                     (3)(15)
      10.47     -    Sublease between Enichem America and Transcell
                     Technologies, Inc. including guarantee by the Registrant
                     (15)
      10.49     -    License Agreement between Registrant and Elan Corporation,
                     plc dated September 9, 1993 (3)(18)
      10.50     -    License Agreement between Transcell Technologies, Inc. and
                     Princeton University dated October 14, 1993 (3)(18)
      10.51     -    Letter Agreement between the Registrant and Mark S. Butler
                     (18)
      10.52     -    License Agreement dated February 18, 1994 between
                     Registrant and Rhone-Poulenc Rorer, S.A. (20)
      10.54     -    Form of Purchase Agreement dated as of February 24, 1994
                     (20)
      10.54(a)  -    Form of Amendment to Purchase Agreement (20)
      10.55     -    Patent License Agreement between Registrant and
                     Massachusetts Institute of Technology dated March 1, 1994
                     (20)
      10.56     -    License Agreement between Progenitor, Inc. and Albert
                     Einstein College of Medicine of Yeshiva University dated
                     as of February 1,1994 (20)

<PAGE>

      10.57     -    Employment Letter dated February 28, 1994 between the
                     Registrant and Thomas F. Farb (21)
      10.58     -    Master Equipment Lease including Schedules and Exhibits
                     between Phoenix Leasing and Registrant (agreements for
                     Transcell and Progenitor are substantially identical),
                     with form of continuing guarantee for each of Transcell
                     and Progenitor (22)
      10.59     -    Exhibit D to Agreement between Registrant and Parexel
                     International Corporation dated as of March 15, 1994.
                     (3)(22)
      10.60(a)  -    Acquisition Agreement dated as of May 13, 1994 among the
                     Registrant, Intercardia, Inc., Cardiovascular Pharmacology
                     Engineering Consultants, Inc. (CPEC), Myocor, Inc. and the
                     sellers named therein (23)
      10.60(b)  -    Amendment dated June 15, 1994 to the Acquisition Agreement
                     (23)
      10.60 (c) -    Form of Consulting Agreement between Intercardia, Inc.,
                     CPEC and Myocor, Inc.(23)
      10.61     -    License Agreement dated December 6, 1991 between Bristol-
                     Myers Squibb and CPEC, as amended (3)(23)
      10.61(a)  -    Letter Agreement dated November 18, 1994 between CPEC and
                     Bristol-Myers Squibb (25)
      10.62     -    Lease Agreement between Thomas R. Eggers and  Progenitor,
                     Inc. dated as of November 1994 with Registrant guaranty
                     (25)
      10.63     -    Form of Stock Purchase Agreement dated December 15, 1994
                     (25)
      10.64     -    Form of Investor Rights Agreement among Progenitor,
                     Transcell, Registrant and each  investor in the subsidiary
                     private placement (25)
      10.64(a)  -    Form of Investor Rights Agreement among Intercardia, the
                     Registrant and each investor in the Intercardia private
                     placement (25)
      10.65     -    1994 Long-Term Incentive Plan (25)
      10.67     -    Employment Agreement between Intercardia and Clayton I.
                     Duncan with Registrant guarantee (25)
      10.67(a)  -    Amendment to Employment Agreement between Intercardia,
                     Inc. and Clayton I. Duncan (27)
      10.68     -    Interneuron Pharmaceuticals, Inc. 1995 Employee Stock
                     Purchase Plan, as amended (27)
      10.69     -    Office Lease, dated April 24, 1995 between Intercardia,
                     Inc. and Highwoods/Forsyth Limited Partnership, with
                     Registrant Guaranty (27)
      10.70 (a) -    License and Collaboration Agreement by and between
                     Progenitor, Inc., and Chiron Corporation dated March 31,
                     1995 (3) (30)
      10.71     -    Securities Purchase Agreement dated June 2, 1995 between
                     the Registrant and Reliance  Insurance Company, including
                     Warrant and exhibits (29)
      10.72     -    Sponsored Research and License Agreement dated as of May
                     1, 1995 between Progenitor and Novo Nordisk (3) (30)
      10.73     -    Form of Stock Purchase Agreement dated as of June 28, 1995
                     (31)

<PAGE>

      10.74     -    Securities Purchase Agreement dated as of August 16, 1995
                     between the Registrant and BT Holdings (New York), Inc.,
                     including Warrant issued to Momint (nominee of BT
                     Holdings) (32)
      10.75     -    Stock Purchase Agreement dated as August 23, 1995 between
                     the Registrant and Paresco, Inc. (32)
      10.76     -    Stock Purchase Agreement dated as of September 15, 1995
                     between the Registrant and Silverton International Fund
                     Limited (32)
      10.77     -    Subscription Agreement dated September 21, 1995, as of
                     August 31, 1995, including Registration Rights Agreement
                     between Registrant and GFL Advantage Fund Limited. (32)
      10.78     -    Contract Manufacturing Agreement dated November 20,1995
                     between Registrant and Boehringer Ingelheim
                     Pharmaceuticals, Inc. (3) (34)
      10.79     -    Development and Marketing Collaboration and License
                     Agreement  between Astra Merck, Inc., Intercardia, Inc.
                     and CPEC, Inc., dated December 4, 1995. (33)
      10.80     -    InterCompany Services Agreement between Registrant and
                     Intercardia, Inc. (33)
      10.81     -    Asset Purchase Agreement dated November 14, 1995 among
                     Registrant, InterNutria, Inc., and Walden Laboratories,
                     Inc. (34)
      10.82     -    Employment Agreement between Registrant and Glenn L.
                     Cooper,  M.D. dated April 30, 1996 effective as of May 13,
                     1996 (37)
      23        -    Consent of Coopers & Lybrand L.L.P. (34)
      27        -    Financial Data Schedule
- ---------------------------
(1)   Incorporated by reference to the Registrant's registration statement on
      Form S-1 (File No. 33-32408) declared effective on March 8, 1990.
(3)   Confidential Treatment requested for a portion of this Exhibit.
(4)   Incorporated by reference to the Registrant's Annual Report on Form 10-K
      for the year ended September 30, 1990.
(7)   Incorporated by reference to Post-Effective Amendment No. 2 to the
      Registrant's registration statement on Form S-1 (File No. 33-32408) filed
      December 18, 1991.
(8)   Incorporated by reference to the Registrant's Quarterly Report on Form
      10-Q for the three months ended December 31, 1991.
(9)   Incorporated by reference to the Registrant's Quarterly Report on Form
      10-Q for the three months ended March 31, 1992.
(12)  Incorporated by reference to the Registrant's Form 8-K dated November 30,
      1992.
(13)  Incorporated by reference to Post-Effective Amendment No. 5 to the
      Registrant's Registration Statement on Form S-1 (File No. 33-32408) filed
      on December 21, 1992.
(14)  Incorporated by reference to the Registrant's Annual Report on Form 10-K
      for the fiscal year ended September 30, 1992.
(15)  Incorporated by reference to the Registrant's Quarterly Report on Form
      10-Q for the three months ended December 31, 1992
(16)  Incorporated by reference to the Registrant's Quarterly Report on Form
      10-Q for the six months ended March 31, 1993

<PAGE>

(17)  Incorporated by reference to the Registrant's Quarterly Report on Form
      10-Q for the nine months ended June 30, 1993
(18)  Incorporated by reference to the Registrant's Annual Report on Form 10-K
      for the fiscal year ended September 30, 1993
(20)  Incorporated by reference to the Registrant's Registration Statement on
      Form S-3 or Amendment No. 1 (File no. 33-75826)
(21)  Incorporated by reference to the Registrant's Form 8-K dated March 31,
      1994
(22)  Incorporated by reference to the Registrant's Quarterly Report on Form
      10-Q for the six months ended March 31, 1994
(23)  Incorporated by reference to the Registrant's Form 8-K dated June 20,
      1994
(25)  Incorporated by reference to the Registrant's Annual Report on Form 10-K
      for the fiscal year ended September 30, 1994
(27)  Incorporated by reference to the Registrant's Quarterly Report on From
      10-Q for the six months ended March 31, 1995
(29)  Incorporated by reference to the Registrant's Quarterly Report on Form 8-
      K dated June 2, 1995
(30)  Incorporated by reference to the Registrant's Quarterly Report on Form 8-
      K dated May 16, 1995; Exhibit 10.70 (a) supersedes Exhibit 10.70.
(31)  Incorporated by reference to Registrant's Quarterly Report on Form 10-Q
      for the nine months ended June 30, 1995.
(32)  Incorporated by referring to Registrant's Report on Form 8-K dated August
      16, 1995.
(33)  Incorporated by reference to Registration Statement filed on Form S-1
      (No. 33-80219) by Intercardia, Inc. on December 8, 1995.
(34)  Incorporated by reference to Registrant's Annual Report on Form 10-K for
      the fiscal year ended September 30, 1995.
(36)  Incorporated by reference to Amendment No. 1 to Registrant's Registration
      Statement on Form S-3 (File No. 333-1273) filed March 15, 1996.
(37)  Incorporated by reference to Registrant's Registration Statement on Form
      S-3 (File No. 333-03131) filed May 3, 1996



(b)   Reports on Form 8-K
      During the three month period ended March 31, 1996, the Company filed
      reports on Form 8-K dated January 18, 1996, February 7, 1996 and March
      22, 1996, and a report on Form 8-K/A dated February 27, 1996.


<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AND STATEMENT OF OPERATIONS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH FINANCIAL STATEMENTS
</LEGEND>
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          MAR-31-1996
<PERIOD-END>                               MAR-31-1996
<CASH>                                      38,459,000
<SECURITIES>                                32,651,000
<RECEIVABLES>                                1,145,000
<ALLOWANCES>                                         0
<INVENTORY>                                  3,629,000
<CURRENT-ASSETS>                            75,301,000
<PP&E>                                       3,204,000
<DEPRECIATION>                             (1,763,000)
<TOTAL-ASSETS>                              78,129,000
<CURRENT-LIABILITIES>                       11,978,000
<BONDS>                                              0
                                0
                                  3,500,000
<COMMON>                                        37,000
<OTHER-SE>                                  41,944,000<F1>
<TOTAL-LIABILITY-AND-EQUITY>                78,129,000
<SALES>                                              0
<TOTAL-REVENUES>                             7,381,000
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                            21,984,000
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             144,000
<INCOME-PRETAX>                           (15,145,000)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                       (15,145,000)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                              (15,145,000)
<EPS-PRIMARY>                                    (.44)
<EPS-DILUTED>                                        0
<FN>
<F1>ADDITIONAL PAID - IN CAPITAL - $135,881,000
ACCUMULATED DEFICIT - $ (93,937,000)
</FN>
        

</TABLE>


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