DISCOVERY LABORATORIES INC /DE/
S-3, 2000-04-20
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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    As filed with the Securities and Exchange Commission on April 20, 2000
================================================================================
                                                     Registration No. 333-86105

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                 ---------------
                                    FORM S-3
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933
                                 ---------------
                          DISCOVERY LABORATORIES, INC.
             (Exact Name of Registrant as Specified in its Charter)
                                 ---------------
<TABLE>
<S>                                               <C>                             <C>

                   Delaware                           350 South Main Street             94-3171943
(State or Other Jurisdiction of Incorporation or            Suite 307                (I.R.S. Employer
                 Organization                     Doylestown, Pennsylvania 18901  Identification Number)
</TABLE>

   (Address, Including Zip Code and Telephone Number, Including Area Code, of
                    Registrant's Principal Executive Offices)
                                 ---------------
                            Robert J. Capetola, Ph.D.
                             Chief Executive Officer
                              350 South Main Street
                                    Suite 307
                         Doylestown, Pennsylvania 18901
                                 (215) 340-4699
 (Name, address, including zip code, and telephone number, including area code,
                             of agent for service)
                                 ---------------
                                   Copies to:
                             Steven A. Fishman, Esq.
                                Battle Fowler LLP
                               75 East 55th Street
                            New York, New York 10022
                                 (212) 856-7000
                                 ---------------

    Approximate  date of commencement  of proposed sale to public:  From time to
time or at one time after the effective date of this  registration  statement as
determined by market conditions.
    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. |_|
                                 ---------------
    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.
                                 ---------------
<TABLE>
<CAPTION>

                                         CALCULATION OF REGISTRATION FEE
==================================================================================================================
                                                            Proposed             Proposed
      Title of each class of          Amount to be      Maximum Offering     Maximum Aggregate       Amount of
   securities to be registered        registered(1)    Price Per Share(2)    Offering Price(2)    Registration Fee
- ------------------------------------------------------------------------------------------------------------------
<S>                                     <C>                  <C>              <C>                    <C>
Common Stock, $.001 par value           3,846,694            $4.4100          $16,955,307.91         $4,476.20
- ------------------------------------------------------------------------------------------------------------------
</TABLE>

(1)  Includes  580,569  shares of common  stock  issuable  upon the  exercise of
     certain Class E warrants and 348,341  shares of common stock  issuable upon
     the exercise of certain placement warrants issued by the registrant.

(2)  Estimated  solely  for the  purpose of  calculating  the  registration  fee
     pursuant  to Rule  457(c)  of the  Securities  Act of 1933 as  amended  and
     determined by multiplying (i) 2,917,784 shares of common stock owned by the
     selling  stockholders  and  registered  for resale  hereunder by $3.375 the
     average  of the high and low of the  common  stock on the  Nasdaq  SmallCap
     Market on April 17, 2000, (ii) 580,569 shares of common stock issuable upon
     the  exercise  of  certain  Class E warrants  by $7.375  and (iii)  348,341
     issuable on  exercise of the  placement  warrants by $8.113.  The  proposed
     maximum  offering price per share represents the weighted average price per
     share.

================================================================================
928158.3

<PAGE>

     Pursuant to Rule 416 under the  Securities  Act of 1933, as amended,  there
are also being  registered such additional  shares of common stock as may become
issuable pursuant to the anti-dilution provisions of the warrants referred to in
footnote 1 above.


928158.3

<PAGE>

The  information in this  prospectus is not complete and may be changed.  We may
not sell  these  securities  until the  registration  statement  filed  with the
Securities and Exchange Commission is effective. This prospectus is not an offer
to  sell  these  securities  and it is not  soliciting  an  offer  to buy  these
securities in any state where such offer or sale is not permitted.


================================================================================
PRELIMINARY PROSPECTUS               SUBJECT TO COMPLETION, DATED APRIL 20, 2000

                                3,846,694 Shares

                          DISCOVERY LABORATORIES, INC.

                                  Common Stock


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



     All of the shares of common stock covered by this  prospectus  are owned by
the  stockholders  listed in the  section  of this  prospectus  called  "Selling
Stockholders"  or are  issuable on  exercise  of  warrants  owned by the selling
stockholders.  The selling stockholders may sell any or all of their shares from
time to time. See "Plan of Distribution."

     We  will  not  receive  any  of  the  proceeds  of  sales  by  the  selling
stockholders.  We have  agreed to bear all  expenses  related to this  offering,
other than underwriting  discounts and commissions and any transfer taxes on the
shares of common stock that the selling stockholders are offering.

     Our common stock is traded on the Nasdaq  SmallCap  Market under the symbol
"DSCO."

     Investing  in this common stock  involves a high degree of risk.  See "Risk
Factors" beginning on page 4.

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


     Neither the  Securities and Exchange  Commission  nor any state  securities
commission has approved or disapproved of these securities or determined if this
prospectus  is truthful or  complete.  Any  representation  to the contrary is a
criminal offense.

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


                 The date of this Prospectus is April __, 2000.














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



928158.3

<PAGE>



                                TABLE OF CONTENTS

                                                                           Page

Prospectus Summary............................................................1

Company Summary...............................................................1

Risk Factors..................................................................3

Forward-Looking Statements...................................................12

Additional Information.......................................................13

Use of Proceeds..............................................................13

Selling Stockholders.........................................................13

Plan of Distribution.........................................................15

Where You Can Find More Information..........................................16

Information Incorporated by Reference........................................16

Experts......................................................................16

Legal Matters................................................................16



928158.3

<PAGE>



                               PROSPECTUS SUMMARY

     Because this is a summary,  it does not contain all the details that may be
important to you. You should read this entire  prospectus  carefully  before you
invest.


                                 COMPANY SUMMARY

     We  are  a  development  stage  pharmaceutical   company  that  focuses  on
developing  compounds to treat  respiratory  diseases that affect the ability of
the  lungs to  absorb  oxygen.  We are  initially  developing  our lead  product
candidate,  Surfaxin(R),  for use by newborn  infants  to treat two  respiratory
conditions in critical care units of hospitals. We are also developing this lead
product candidate for the treatment of acute  respiratory  distress syndrome and
acute lung injury in adult patients.  We believe we can use Surfaxin(R) to treat
other  respiratory   conditions.   These  include  asthma,  chronic  obstructive
pulmonary disease, emphysema and cystic fibrosis. In addition, we believe we can
use  Surfaxin(R)  to deliver  drugs that are  currently  delivered by injection.
These  drugs  include  antibiotics,   pulmonary  vasodilators,   brochodilators,
steroids  and  proteins.  We are  also  evaluating  acquiring  licenses  to drug
candidates in the early stage of  development  for the treatment of  respiratory
diseases.  We may  develop  and market our  products on our own or seek to enter
into  collaborations  with corporate  partners for  manufacturing  and marketing
these drugs.

        Our lead product is  Surfaxin(R).  Surfaxin(R)  is a  formulation  of an
artificial  lung  surfactant  containing a peptide or chain of amino  acids.  We
patterned  Surfaxin(R)  after  a  human  surfactant  protein.   Surfactants  are
substances that are produced in the lungs. They possess the ability to lower the
surface  tension  of the fluid  normally  present  within  the air sacs that are
inside of the lungs.  In the absence of sufficient  surfactants,  these air sacs
tend to collapse. As a result, the lungs do not absorb sufficient oxygen.

        We intend to use  Surfaxin(R)  for the treatment of several  respiratory
conditions.  Currently,  we are  developing  Surfaxin(R)  for the  treatment  of
respiratory distress syndrome in premature infants, meconium aspiration syndrome
in  full-term  infants and acute  respiratory  distress  syndrome and acute lung
injury in  adults.  We have also begun  developing  Surfaxin(R)  to treat  other
respiratory disorders.

        Respiratory  distress syndrome is a condition in which premature infants
are born with an insufficient amount of their own natural  surfactant.  Meconium
aspiration syndrome is a similar condition,  in which full-term infants are born
with meconium in their lungs. Meconium is the baby's first bowel movement in the
mother's womb.  This condition can lead to meconium  aspiration  syndrome if the
baby breathes in the meconium.  Both of these conditions can be life-threatening
as a result  of the  failure  of the lungs to absorb  sufficient  oxygen.  These
conditions can also deplete  natural  surfactants in the lungs.  This results in
the need for mechanical  ventilation.  Acute  respiratory  distress syndrome can
result from a variety of events.  Some of these events are pneumonia,  breathing
in the contents of the stomach, trauma, smoke inhalation, near drowning and head
injury.

        Acute   respiratory   distress   syndrome/acute   lung  injury   affects
approximately  240,000  patients  per  year in the  United  States.  Respiratory
distress  syndrome in premature  infants  affects 40,000 to 50,000  newborns per
year in the United States.  Twenty to forty percent of infants with  respiratory
distress syndrome require extended mechanical  ventilation and  hospitalization.
Meconium  aspiration syndrome affects  approximately  26,000 newborn infants per
year in the United States.



928158.3

<PAGE>



        Presently,  the  FDA  has  only  approved  replacement  surfactants  for
treating  respiratory  distress  syndrome in premature  infants.  These approved
replacement  surfactants  come from pigs and cows.  Surfaxin(R)  is a  synthetic
surfactant.  As a result,  we believe that we can manufacture  Surfaxin(R)  less
expensively.  In  addition  we believe  that  Surfaxin(R)  might  possess  other
pharmaceutical  benefits not  possessed by animal  surfactants.  The FDA has not
approved  replacement  surfactants for treatment of meconium aspiration syndrome
and acute respiratory distress syndrome. The FDA has granted meconium aspiration
syndrome and acute respiratory  distress syndrome fast track  designation.  Fast
track status does not accelerate  the clinical  trials nor does it mean that the
regulatory requirements are less stringent. However, the FDA will review the New
Drug Application for a drug granted fast track status within six months. The FDA
has awarded us an orphan drug grant to support our development of Surfaxin(R) in
meconium aspiration syndrome.

        We also intend to begin preclinical research into converting Surfaxin(R)
into an aerosol spray for the treatment of asthma, chronic obstructive pulmonary
disease,  acute  and  chronic  bronchitis  and a  variety  of other  respiratory
diseases.

        Our second compound under development is SuperVent(TM). We intend to use
SuperVent(TM)  to treat  airway  diseases  such as cystic  fibrosis  and chronic
bronchitis.  We deliver SuperVent(TM) to patients using a nebulizer. A nebulizer
is a device that turns liquid into mist,  making it  breathable.  We  anticipate
using SuperVent(TM) for the treatment of lung conditions involving inflammation,
excessive  mucous and injurious  oxidation.  Injurious  oxidation is a condition
where atoms in tissue lose electrons, which can result in damage to the tissue.

        Cystic  fibrosis  is a  progressive,  lethal  respiratory  disease  that
afflicts  approximately  23,000  patients in the United  States and a comparable
number in Europe.  Cystic  fibrosis is the most common  lethal  genetic  disease
among  Caucasians.  Because of this genetic defect,  mucus accumulates and clogs
the lungs,  impairing  breathing.  This can lead to gradual  destruction  of the
lungs of cystic fibrosis  patients.  The inability to clear mucus from the lungs
can lead to blockage of the airways in the lungs. A new therapy that is intended
to minimize the  complications  of cystic  fibrosis could have a major impact on
the length and quality of life of its patients.

        We are conducting  clinical  trials of Surfaxin(R)  for the treatment of
respiratory   distress  syndrome,   meconium   aspiration   syndrome  and  acute
respiratory distress syndrome. In addition, we are conducting clinical trials of
SuperVent(TM) for treatment of cystic fibrosis.

        In October  1999,  we entered into a sublicense  agreement and exclusive
manufacturing  agreement for  Surfaxin(R) in the  territories of southern Europe
and Latin America with Laboratorios Del Dr. Esteve, S.A.

        Surfaxin(R) and SuperVent(TM)  are our trademarks.  This prospectus also
includes  product names,  trademarks and trade names of other  companies,  which
names are the exclusive property of the holders thereof.

        Our executive  offices are located at 350 South Main Street,  Suite 307,
Doylestown,  Pennsylvania  18901. Our telephone number is (215) 340-4699 and our
facsimile number is (215) 340-3940.


928158.3
                                        2

<PAGE>



                                  RISK FACTORS

     Investing  in our common stock  involves a high degree of risk.  You should
consider  carefully  the following  risk factors  together with all of the other
information  included or incorporated by reference in this prospectus before you
decide to  purchase  shares of our  common  stock.  The risks and  uncertainties
described below are not the only ones facing our company.  Additional  risks and
uncertainties not presently known to us or that we currently deem immaterial may
also impair our business operations.

If any of the following risks actually occur, our business,  financial condition
and results of operations  could be materially and adversely  affected.  In this
event,  the trading  price of our common stock could  decline and you could lose
part or all of your investment.

Because We Are a Development Stage Company, We May Not Successfully  Develop and
Market Our Products,  and Even If We Do, We May Not Generate  Enough  Revenue or
Become Profitable.
- --------------------------------------------------------------------------------

We are a development stage company.  Therefore, you must evaluate us in light of
the uncertainties and complexities  present in a development stage biotechnology
company.  We are conducting  research and development on our product candidates.
Accordingly,  we have  not  begun  to  market  or  generate  revenues  from  the
commercialization  of  any  of  these  products.  We  will  need  to  engage  in
significant,  time-  consuming and costly  research,  development,  pre-clinical
studies,  clinical  testing  and  regulatory  approval  for our  products  under
development  prior to their  commercialization.  In  addition,  pre-clinical  or
clinical studies may show that our products are not effective or safe for one or
more  of   their   intended   uses.   We  may  fail  in  the   development   and
commercialization  of  our  products.   Since  inception,  we  have  incurred  a
cumulative  operating loss of  approximately  $32,000,000 and we expect to incur
significant  increasing  operating  losses over the next  several  years.  If we
succeed in the  development of our products,  we still cannot assure you that we
will generate sufficient or sustainable revenues or that we will be profitable.

The Types of Products We Are  Developing Are Subject to Risks That Are Difficult
to Foresee, and We May Not Succeed In Our Development Efforts.
- --------------------------------------------------------------------------------

Our  development of products is subject to the risks of failure  inherent in the
development  of new  pharmaceutical  products  which  utilize  innovative or new
technologies.  During the development  process,  we could experience  unforeseen
problems that could delay us from completing the development of our products. As
a result,  we may terminate  development of these products or  applications.  We
cannot assure you:

    --  that we will succeed in our research and development;

    --  that we will successfully market our proposed products.

If We Cannot Raise  Additional  Capital We Will Need to Discontinue Our Research
and Development  Activities.  In Addition, Any Additional Financing Could Result
in Dilution.
- --------------------------------------------------------------------------------

We do not have  enough  working  capital to continue  to meet our  research  and
development  requirements  and  we  may  not  obtain  the  additional  financing
necessary  to meet  these  requirements.  We will  need  substantial  additional
funding to conduct our research and product  development  activities  and, if we
are successful,  to manufacture and market products.  We intend to raise further
funds  through  collaborative  ventures  entered into with  potential  corporate
partners and through additional debt or equity financings.  We may in some cases
elect to develop products on our own instead of entering into collaboration

928158.3
                                        3

<PAGE>



arrangements.  This  would  increase  our cash  requirements  for  research  and
development.   We  cannot  provide  assurance  that  we  will  obtain  necessary
financing.  Any additional  financing could include unattractive terms or result
in significant  dilution of  stockholders'  interests.  If we fail to enter into
collaborative  ventures or to receive additional  funding,  we may have to scale
back or discontinue our research and  development  operations.  Furthermore,  we
could  cease to qualify  for listing of our  securities  on the Nasdaq  SmallCap
Market.  See "We Face the  Possibility  of  Delisting  From the Nasdaq  SmallCap
Market."

If We Fail to Obtain Regulatory Approval to Commercially Manufacture or Sell Any
of Our  Products or If the FDA Delays  Approval of Our  Product  Candidates,  it
Could Increase the Cost of Product  Development  or Ultimately  Prevent or Delay
Our Ability to Sell Our Products and Generate Revenues.
- --------------------------------------------------------------------------------

In order to sell  our  products  that are  under  development,  we must  receive
regulatory  approvals  for our  products.  The FDA and  comparable  agencies  in
foreign countries extensively and rigorously regulate the testing,  manufacture,
distribution,  advertising,  pricing and marketing of drug products. The FDA and
comparable agencies in other countries require an extensive  regulatory approval
process  before we can market our  product.  This process  includes  preclinical
studies and clinical  trials of each  pharmaceutical  compound to establish  its
safety  and  effectiveness  and  confirmation  by the FDA that the  manufacturer
maintains good laboratory,  clinical and manufacturing  practices during testing
and manufacturing.  The process is lengthy,  expensive and uncertain. It is also
possible that we may not reach  agreement with the FDA on the design of clinical
studies necessary for approval.  In addition,  conditions  imposed by the FDA on
our  clinical  trials  could  significantly   increase  the  time  required  for
completion  of  clinical  trials and the costs of  conducting  clinical  trials.
Clinical trials generally take two to five years or more to complete.

The testing  and  approval  processes  require the  expenditure  of  substantial
resources. The FDA may not give us the requisite approvals for our products on a
timely basis, if ever. The FDA could withdraw any approvals we obtain.  Further,
if there is a later  discovery of unknown  problems or if we fail to comply with
other applicable regulatory requirements at any stage in the regulatory process,
the FDA may restrict or delay our  marketing  of a product,  or force us to make
product  recalls.  In addition,  the FDA could impose  other  sanctions  such as
fines,  injunctions,  civil  penalties or criminal  prosecutions.  For marketing
outside  the  United  States,  we also need to comply  with  foreign  regulatory
requirements   governing  human  clinical  trials  and  marketing  approval  for
pharmaceutical  products.  The FDA and foreign  regulators have not yet approved
any of our products  under  development  for  marketing in the United  States or
elsewhere. If the FDA and other regulators do not approve our products, it could
prevent us from marketing our products.

Our Strategy,  In Many Cases,  Is to Enter into  Collaboration  Agreements  with
Third  Parties  with  Respect  to Our  Products  and We May  Require  Additional
Collaboration Agreements. In Addition, If We Enter into These Agreements and the
Third Parties Do Not Perform,  it Could Impair Our Ability to Commercialize  Our
Products.
- --------------------------------------------------------------------------------

Our strategy for the completion of the required development and clinical testing
of our products and for the manufacturing,  marketing and  commercialization  of
our  products,   in  many  cases,   depends  upon  entering  into  collaboration
arrangements with  pharmaceutical  companies.  We have entered into a sublicense
agreement for Surfaxin(R)  covering  southern  Europe and Latin America.  We may
need to enter into additional collaboration  agreements.  Our success may depend
upon obtaining partners.  In addition,  we may depend on our partners' expertise
and dedication of sufficient resources to develop and commercialize our proposed
products. We may in the future grant to collaboration partners rights to license
and

928158.3
                                        4

<PAGE>



commercialize  pharmaceutical products developed under collaboration agreements.
Under these  arrangements our  collaboration  partners may control key decisions
relating  to the  development  of the  products.  Those  rights  would limit our
flexibility  in  considering  alternatives  for  the  commercialization  of  our
products.  If we fail to  develop  successfully  these  relationships  or if our
collaboration  partners fail to develop successfully or commercialize any of our
products,  it may delay or prevent us from  developing  or  commercializing  our
products in a competitive and timely manner.

Discoveries or Developments of New Technologies by Our Competitors or Others May
Make Our Products less Competitive or Make Our Products Obsolete.
- --------------------------------------------------------------------------------

There are rapidly changing  technologies and evolving industry  standards in the
biotechnology and pharmaceutical markets. We intend to market our products under
development  for the  treatment  of diseases  for which other  technologies  and
proposed treatments are rapidly  developing.  The research efforts of others may
render our research and product  development  efforts  obsolete.  Third  parties
conducting  research include  governments,  major research  facilities and large
multinational corporations.  Many of the third parties have greater research and
development,  manufacturing,  marketing, financial, technological,  personal and
managerial resources than we have.

If We Cannot Protect Our  Intellectual  Property,  Other Companies Could Use Our
Technology in Competitive  Products.  If We Infringe the  Intellectual  Property
Rights of Others,  Other Companies Could Prevent us from Developing or Marketing
Our Products.
- --------------------------------------------------------------------------------

We seek patent  protection for our drug  candidates so as to prevent others from
commercializing   equivalent   products  in  substantially   less  time  and  at
substantially  lower expense.  The pharmaceutical  industry places  considerable
importance on obtaining patent and trade secret protection for new technologies,
products and processes.  Our success will depend in part on our ability and that
of parties from whom we license technology to:

    --  defend our patents and otherwise  prevent others from  infringing on our
        proprietary rights;

    --  protect trade secrets; and

     -- operate without infringing upon the proprietary  rights of others,  both
        in the United States and in other countries.

The patent position of firms relying upon  biotechnology is highly uncertain and
involves complex legal and factual questions.  To date, the United States Patent
and Trademark Office ("USPTO") has not adopted a consistent policy regarding the
breadth of claims that the USPTO allows in  biotechnology  patents or the degree
of protection that these types of patents afford.

Even If We Obtain  Patents to Protect  Our  Products,  Those  Patents May Not Be
Sufficiently Broad and Others Could Compete with Us.
- --------------------------------------------------------------------------------

We, or the  parties  licensing  technologies  to us, have filed  various  United
States  and  foreign  patent  applications  with  respect  to the  products  and
technologies under our development and the USPTO and foreign patent offices have
issued  patents  with respect to our  products  and  technologies.  These patent
applications   include   international   applications  filed  under  the  Patent
Cooperation  Treaty. Our pending patent  applications,  those we may file in the
future or those we may license from third parties may not result in the USPTO or
foreign  patent office  issuing  patents.  Also,  if patent rights  covering our
products

928158.3
                                        5

<PAGE>



are not sufficiently broad, they may not provide us with proprietary  protection
or  competitive   advantages  against  competitors  with  similar  products  and
technologies.  Furthermore, if the USPTO or foreign patent offices issue patents
to us or our  licensors,  others may  challenge  the patents or  circumvent  the
patents,  or the patent office or the courts may invalidate  the patents.  Thus,
any patents we own or license from third parties may not provide any  protection
against competitors.  In particular,  our issued and pending patents relating to
SuperVent(TM) cover high concentrations of tyloxapol.  These patents could prove
meaningless  if low  concentrations  of  tyloxapol  are as  effective  as higher
concentrations  of tyloxapol in treating the indications which we are developing
our SuperVent(TM) product to treat.

Patents Which Others Obtain Could Limit Our Ability to Market Our Products.
- --------------------------------------------------------------------------------

Our  commercial  success  also  significantly  depends on our ability to operate
without  infringing the patents or violating the  proprietary  rights of others.
The  USPTO  keeps  United  States  patent  applications  confidential  while the
applications  are pending.  Accordingly,  we cannot  determine which  inventions
third parties claim in pending patent applications which they have filed. We may
need to engage in litigation to defend or enforce our patent and license  rights
or to determine the scope and validity of the proprietary  rights of others.  It
will be expensive and time consuming to defend and enforce patent claims.  Thus,
even in  those  instances  in  which  the  outcome  is  favorable  to us,  these
proceedings can result in the diversion of substantial  resources from our other
activities.  An adverse determination may subject us to significant  liabilities
or  require  us to seek  licenses  that  third  parties  may not grant to us. An
adverse  determination  could also require us to alter our products or processes
or cease altogether any related  research and development  activities or product
sales.

If We Cannot Meet Requirements under Our License  Agreements,  We Could Lose Our
Rights to Our Products.
- --------------------------------------------------------------------------------

We depend on licensing  arrangements  to maintain  rights to our products  under
development.   These  agreements   require  us  to  make  payments  and  satisfy
performance  obligations  in order to maintain our rights under these  licensing
arrangements.  In  addition,  we are  responsible  for the  cost of  filing  and
prosecuting  patent  applications and maintaining issued patents licensed to us.
If we do not meet our  obligations  under  our  license  agreements  in a timely
manner, we could lose the rights to our proprietary technology.

We Rely on Confidentiality Agreements That Our Employees Could Breach.
- --------------------------------------------------------------------------------

We require all employees to enter into confidentiality  agreements that prohibit
the  disclosure  of  confidential  information  to  third  parties  and  require
disclosure and assignment to us of rights to our employees' ideas, developments,
discoveries and inventions while we employ them. In addition,  we seek to obtain
these  types  of  agreements  from  our   consultants,   advisors  and  research
collaborators.  To the extent that  consultants,  key  employees  or other third
parties   apply   technological   information   which  they  or  other   parties
independently develop to any of our proposed projects,  disputes may arise as to
the proprietary  rights to this type of  information.  In such case, a court may
determine that the right belongs to a third party. In addition,  we will rely on
trade secrets and  proprietary  know-how that we will seek to protect in part by
confidentiality agreements with our employees,  consultants, advisors or others.
We cannot assure you:

    --  that they will not breach these agreements; or


928158.3
                                        6

<PAGE>



     -- that agreements we would obtain would provide adequate remedies for this
        type of breach or that our trade  secrets or  proprietary  know-how will
        not otherwise become known or competitors will not independently develop
        similar technology.

If the Third  Parties  We Depend on for the  Manufacture  of Our  Pharmaceutical
Products Do Not Supply These Products in a Timely Manner, it May Delay or Impair
Our Ability to Develop and Market Our Products.
- --------------------------------------------------------------------------------

We rely on outside  manufacturers,  including Taylor  Pharmaceuticals,  Inc., to
produce  appropriate  clinical  grade  material that meets  standards for use in
clinical  studies for our products.  We will also rely on outside  manufacturers
for  production of products  after  marketing  approval.  We may also enter into
arrangements with other manufacturers for the manufacture of material for use in
clinical testing and after marketing approval.

Our outside  manufacturers may not perform as they have agreed or may not remain
in the contract  manufacturing  business for a sufficient  time to  successfully
produce and market our product  candidates.  In this event we may fail to find a
replacement  manufacturer or develop our own manufacturing  capabilities.  If we
cannot do so, it could delay or impair our ability to obtain regulatory approval
for our products.  There could be a substantial delay before the FDA and foreign
regulatory  authorities  qualify and  register a new  facility of a  replacement
manufacturer

We may in the future elect to manufacture some of our products on our own. We do
not  currently  have  a  manufacturing  facility,  manufacturing  experience  or
manufacturing  personnel. If we determine to manufacture products on our own and
do not successfully develop manufacturing capabilities, it will adversely affect
sales of our products.

In addition, the FDA and foreign regulatory authorities require manufacturers to
register manufacturing facilities.  The FDA and corresponding foreign regulators
inspect these facilities to confirm compliance with good manufacturing  practice
requirements that the FDA or corresponding foreign regulators establish.  If our
third-party  foreign or domestic suppliers or manufacturers of our products fail
to comply with good manufacturing  practice requirements or other FDA regulatory
requirements, it could adversely affect our ability to market our products.

We Do Not Have Marketing and Sales  Experience,  and Our Lack of That Experience
Could Limit Our Ability to Generate Revenues from Future Product Sales.
- --------------------------------------------------------------------------------

We do not have marketing and sales  experience or marketing or sales  personnel.
If we do not  develop  a  marketing  and  sales  force,  then we will  depend on
arrangements  with  corporate  partners or other  entities for the marketing and
sale of our  products.  We may not  succeed in  entering  into any  satisfactory
third-  party  arrangements  for the  marketing  and  sale of our  products.  In
addition,  we may not succeed in developing  marketing and sales capabilities or
we may not have sufficient resources to do so. If we fail to establish marketing
and sales capabilities or fail to enter into arrangements with third parties, it
will adversely affect sales of our products.

We Depend upon Key Employees and Consultants in a Competitive Market for Skilled
Personnel.  If We Are  Unable to  Attract  and  Retain  Key  Personal,  it Could
Adversely Effect Our Ability to Develop and Market Our Products.
- --------------------------------------------------------------------------------

928158.3
                                        7

<PAGE>



We are highly  dependent  upon the  principal  members of our  management  team,
especially Dr. Capetola,  and our directors,  as well as our scientific advisory
board members,  consultants and collaborating  scientists. We have an employment
agreement  with Dr.  Capetola  which  expires  on June 15,  2002.  We also  have
employment  agreements with other key personnel with termination  dates in 2001.
We do not maintain  key-man life  insurance.  The loss of any of these  persons'
services would  adversely  affect our ability to develop and market our products
and obtain necessary regulatory approvals.

Our future success also will depend in part on the continued  service of our key
scientific and management personnel and our ability to identify, hire and retain
additional personnel, including marketing and sales staff. We experience intense
competition for qualified personnel.

While we attempt to provide  competitive  compensation  packages  to attract and
retain  key  personnel,  some of our  competitors  are  likely  to have  greater
resources  and more  experience  than we have,  making  it  difficult  for us to
compete for key personnel.

Our Industry is Highly  Competitive  and We Have less Capital and Resources than
Many of Our  Competitors,  and This May Give Them an Advantage in Developing and
Marketing Products Similar to Ours.
- --------------------------------------------------------------------------------

Our industry is highly competitive.  We compete with numerous existing companies
intensely  in many ways.  We expect new  companies  to enter our industry and we
expect  competition  to increase.  Many of these  companies  have  substantially
greater research and development, marketing, financial, technological, personnel
and managerial  resources than we have. In addition,  many of these competitors,
either alone or with their collaborative  partners,  have significantly  greater
experience than we do in:

    --  developing products;

    --  undertaking preclinical testing and human clinical trials;

    --  obtaining FDA and other regulatory approvals or products; and

    --  manufacturing and marketing products.

Accordingly,  our  competitors  may  succeed  in  obtaining  patent  protection,
receiving  FDA approval or  commercializing  products  before us. If we commence
commercial  product  sales,  we will  compete  against  companies  with  greater
marketing and manufacturing  capabilities.  These are areas in which, as yet, we
have limited or no experience.  In addition,  developments  by  competitors  may
render our product  candidates  obsolete or  uncompetitive.  Our competitors may
succeed in developing and marketing products that are more effective than ours.

We  also  face,   and  will  continue  to  face,   competition   from  colleges,
universities,  governmental  agencies  and other  public  and  private  research
organizations.  These  competitors  are becoming  more active in seeking  patent
protection and licensing arrangements to collect royalties for use of technology
that they have developed.  Some of these  technologies may compete directly with
the technologies  that we are developing.  These  institutions will also compete
with us in recruiting  highly  qualified  scientific  personnel.  We expect that
therapeutic  developments  in the  areas in which we are  active  may occur at a
rapid rate and that  competition  will  intensify  as advances in this field are
made.  Accordingly,  we need to continue  to devote  substantial  resources  and
efforts to research and development activities.


928158.3
                                        8

<PAGE>



If Product  Liability  Claims Are  Brought  Against Us, it May Result in Reduced
Demand for Our Products or Damages That Exceed Our Insurance Coverage.
- --------------------------------------------------------------------------------

The marketing and use of our products exposes us to product  liability claims in
the event that the use or misuse of those  products  causes  injury,  disease or
results in adverse effects.  Use of our products in clinical trials,  as well as
commercial sale, could result in product liability claims. In addition, sales of
our products through third party  arrangements  could also subject us to product
liability claims. We presently carry product liability insurance relating to our
clinical  trials of  Surfaxin(R)  and  SuperVent(TM).  However,  this  insurance
coverage  might not  fully  cover any  potential  claims.  We may need to obtain
additional  product  liability  insurance  coverage prior to initiation of other
clinical trials. We expect to obtain product liability insurance coverage before
commercialization of our proposed products; however, this insurance is expensive
and insurance companies may not issue this type of insurance when we need it. We
cannot provide assurance that we can obtain adequate  insurance in the future at
an acceptable cost. Any product liability claim, even one that was not in excess
of our insurance  coverage or one that is meritless,  could adversely affect our
cash  available  for  other  purposes,  such as  research  and  development.  In
addition,  the  existence of a product  liability  claim could affect the market
price of our common stock.

Healthcare  Reform  Measures and  Reimbursement  Procedures  May Prevent Us from
Obtaining an Adequate Level of Reimbursement for Our Products That in Turn Would
Decrease Our Ability to Generate Revenues.
- --------------------------------------------------------------------------------

Efforts of governmental and third-party payors to contain or reduce the costs of
health  care  through  various  means could  affect the levels of  revenues  and
profitability of pharmaceutical  and biotechnology  products and companies.  For
example,  in some foreign  markets,  pricing or  profitability  of  prescription
pharmaceuticals is subject to government  control.  In the United States,  there
have  been a  number  of  federal  and  state  proposals  to  implement  similar
government control.  Pricing constraints on our products could negatively impact
our revenues and profitability.

In the United States and elsewhere, successful commercialization of our products
will depend in part on the  availability of  reimbursement to the consumer using
our products from third-party  health care payors such as government and private
insurance plans.  Third-party payors may not provide sufficient reimbursement to
enable us to maintain price levels  sufficient to realize an appropriate  return
on our  investment in product  development.  Third-party  health care payers are
increasingly  challenging  the price and  examining  the  cost-effectiveness  of
medical products and services. If we succeed in bringing one or more products to
market,  and the  government  or  third-party  payors  fail to provide  adequate
coverage or reimbursement rates for those products,  it could reduce our product
sales and product revenues.

Directors,  Executive Officers,  Principal  Stockholders and Affiliated Entities
Own a Significant Percentage of Our Capital Stock, and this Could Have an Effect
on Actions by the Stockholders.
- --------------------------------------------------------------------------------

As of March 29, 2000, our directors,  executive officers, principal stockholders
and affiliated entities beneficially own, in the aggregate, approximately 32% of
our outstanding  voting  securities.  Accordingly,  these  stockholders have the
ability  to exert  substantial  influence  over  the  election  of our  Board of
Directors and the outcome of issues requiring approval by our stockholders. This
concentration  of  ownership  may have the effect of  delaying or  preventing  a
change in control.  This could prevent  transactions in which stockholders might
otherwise recover a premium for their shares over current market prices.

We Face the Possibility  that Nasdaq May Delist our Common Stock from the NASDAQ
Smallcap Market.
- --------------------------------------------------------------------------------

928158.3
                                        9

<PAGE>



To meet the  current  listing  requirements  for Nasdaq to  continue to list our
securities on the Nasdaq SmallCap Market, we will have to maintain:

        (a)   (1) at least $2 million in net tangible assets or

              (2) $35 million in market capitalization or

              (3) $500,000 in net income (over two of the last three years), and

        (b) a public float of at least  500,000  shares  valued at $1 million or
            more and

        (c) a minimum bid price of $1 and

        (d) at least 300 holders of our common stock and

        (e) at least two active market makers.

At December 31, 1999,  we had  $3,108,000  in net tangible  assets.  The closing
price of our common  stock  during the period from  January 1, 1999 to April 19,
2000 ranged from $1.00 to $12.63 and the  closing  price of our common  stock on
April 19, 2000 was $5.34.  We may need to raise  additional  capital in order to
continue to meet the listing requirements.

If we are  unable to satisfy  the  listing  requirements,  Nasdaq may delist our
securities  from the Nasdaq  SmallCap  Market.  If any  trading  markets for our
securities are  available,  investors  could only trade in the  over-the-counter
market in the Pink  Sheets(R)  (a  quotation  medium  operated  by the  National
Quotation Bureau,  LLC), or on the NASD's OTC Bulletin  Board(R).  Consequently,
this would impair the liquidity of our securities.  This could reduce the number
of our securities investors could buy and sell and could result in delays in the
timing of the  transactions,  reduction  in  securities  analysts'  and the news
media's coverage of us and lower prices for our securities.

The "Penny Stock" Rules May Adversely Affect the Liquidity of Our Common Stock.
- --------------------------------------------------------------------------------

If Nasdaq delisted our securities from the Nasdaq  SmallCap  Market,  Rule 15g-9
under the Exchange Act would apply. Rule 15g-9 imposes additional sales practice
requirements  on  broker-dealers  that sell these types of securities to persons
other  than  established  customers  and  "accredited   investors"   (generally,
individuals  with net worth in excess of $1,000,000 or annual incomes  exceeding
$200,000,  or $300,000 together with their spouses).  For transactions that this
rule covers, a broker-dealer must make a special  suitability  determination for
the purchaser and receive the  purchaser's  written  consent to the  transaction
prior to sale.  Consequently,  the rule may  adversely  affect  the  ability  of
broker-dealers  to sell our securities  and may adversely  affect the ability of
stockholders to sell any of our securities in the secondary market.

The Commission has adopted regulations that define a "penny stock". Generally, a
penny stock is an equity security that has a market price of less than $5.00 per
share. For any transaction involving a penny stock that is not exempt, the rules
require that a broker-dealer  deliver a disclosure  schedule that the Commission
has  prepared  relating to the penny stock  market.  The rule also  requires the
broker-dealer  to disclose  information  about  commissions  payable to both the
broker-dealer and the registered  representative  and current quotations for the
securities.   Finally,  rules  require  that  the  broker-dealers  send  monthly
statements  disclosing  recent price information for the penny stock held in the
account and information on the limited market in penny stocks.

928158.3
                                              10

<PAGE>



These  restrictions  will not apply to our  securities  if the  Nasdaq  SmallCap
Market  continues to list our  securities.  If Nasdaq delists our securities and
they become subject to the existing or proposed rules on penny stocks,  it could
severely adversely affect the market liquidity for our securities.

A  Substantial  Number of Our  Securities  Are Eligible for Future Sale and this
Could Affect the Market Price for Our Stock and Our Ability to Raise Capital.
- --------------------------------------------------------------------------------

The market  price of our common  stock could drop due to sales of a large number
of shares of our common stock or the perception that these sales could occur. As
of April 19, 2000, there were  approximately  20,707,804  shares of common stock
currently outstanding.  In addition, as of April 19, 2000 up to 6,412,794 shares
of Common Stock were issuable on exercise of outstanding options and warrants.

Holders of our stock options and warrants are likely to exercise  them, if ever,
at a time when we otherwise  could obtain a price for the sale of our securities
that is higher than the exercise  price per security of the options or warrants.
This  exercise or the  possibility  of this  exercise  may impede our efforts to
obtain additional  financing  through the sale of additional  securities or make
this financing more costly.

We cannot predict the effect that the availability of these shares for sale will
have on the market price of our common stock. Nevertheless,  because holders may
sell  substantial  amounts of our common stock in the public market,  the market
price of our common stock could drop as a result of sales of these securities or
the  perception  that these types of sales may occur.  These  factors could also
make it more  difficult  for us to  raise  funds  through  future  offerings  of
securities.

Anti-takeover  Provisions of Our Certificate of  Incorporation  and Delaware Law
Could  Delay  Actual  or  Potential  Changes  of  Control,  Which  Could  Affect
Stockholder   Ability  to  Benefit  From  Market  Fluctuations  and  Changes  in
Management.
- --------------------------------------------------------------------------------

Our Certificate of Incorporation  and Delaware law contain  provisions which may
discourage  transactions  involving actual or potential changes in control.  Our
Certificate  of  Incorporation  allows  us to issue  shares of  preferred  stock
without any vote or further action by our  shareholders.  Our Board of Directors
has the authority to fix and determine the relative  rights and  preferences  of
preferred  shares.  Our Board of Directors also has the authority to issue these
shares without further stockholder approval. As a result, our Board of Directors
could  authorize the issuance of a series of preferred stock that would grant to
holders the preferred right to our assets upon liquidation, the right to receive
dividend  payments  before  dividends  on  common  stock  and the  right  to the
redemption of these shares,  together with a premium, prior to the redemption of
our  common  stock.  In  addition,  our  Board  of  Directors,  without  further
stockholder  approval,  could  issue  large  blocks of  preferred  stock to fend
against unwanted tender offers or hostile takeovers.

We are also subject to  provisions of Delaware law that could delay or make more
difficult a merger,  tender offer or proxy contest  involving us. In particular,
we are  subject to Section  203 of the  Delaware  General  Corporation  Law that
prohibits a Delaware  corporation from engaging in any business combination with
any  interested  stockholder  for a period of three  years  unless  the Board of
Directors and stockholders  approve the transactions in a prescribed  manner. In
general,  Section 203 defines an interested  stockholder as any entity or person
beneficially  owning  15%  or  more  of  the  outstanding  voting  stock  of the
corporation  and  any  entity  or  person  affiliated  with  or  controlling  or
controlled by this type of entity or person.  The possible issuance of preferred
stock and the  provisions of Delaware law could have the effect of  discouraging
others from making tender offers for our securities. As a consequence, they also
may inhibit

928158.3
                                       11

<PAGE>



fluctuations in the market price of our common stock that otherwise could result
from actual or rumored  takeover  attempts.  Those  provisions also may have the
effect of preventing changes in our management.


                           FORWARD-LOOKING STATEMENTS

The statements set forth under the captions  "Company  Summary" and elsewhere in
this  prospectus,   including  in  "Risk  Factors,"  which  are  not  historical
constitute "Forward Looking Statements" within the meaning of Section 27A of the
Securities  Act and  Section  21E of the  Securities  Exchange  Act of 1934,  as
amended, including statements regarding the expectations, beliefs, intentions or
strategies  for the future.  We intend that all  forward-looking  statements  be
subject to the  safe-harbor  provisions  of the  Private  Securities  Litigation
Reform Act of 1995. These forward-looking statements reflect our views as of the
date they are made with respect to future events and financial performance,  but
are  subject  to many  risks and  uncertainties,  which  could  cause our actual
results to differ  materially  from any future  results  expressed or implied by
such forward-looking statements.

Examples of such risks and  uncertainties  include,  but are not limited to, the
inherent  risks and  uncertainties  in  developing  products  of the type we are
developing;  possible  changes in our financial  condition;  the progress of our
research and  development  (including the risk that our lead product  candidate,
Surfaxin(R),  will not prove to be safe or useful for the  treatment  of certain
indications);   the  impact  of  development  of  competing   therapies   and/or
technologies  by other  companies;  our  ability to obtain  additional  required
financing to fund our research  programs;  our ability to enter into  agreements
with  collaborators  and the  failure of  collaborators  to perform  under their
agreements  with us; the  results of  clinical  trials  being  conducted  by the
Company; the progress of the FDA approvals in connection with the conduct of our
clinical  trials and the  marketing of our  products;  the  additional  cost and
delays  which may result from  requirements  imposed by FDA in  connection  with
obtaining the required approvals;  and the other risks and certainties  detailed
in "Risk  Factors",  and in the  documents  incorporated  by  reference  in this
prospectus.

We do not undertake to update any forward-looking statements.

                             ADDITIONAL INFORMATION

        The  Company  and  the  Placement  Agent  will  make  available  to each
prospective  investor  and his or her  representative  during  the course of the
Offering, upon request by the prospective investor or his or her representative,
copies of the Exhibits  hereto not included  herewith,  the  opportunity  to ask
questions  and  receive  answers  concerning  the  terms and  conditions  of the
Offering, and to obtain any additional information.

                                 USE OF PROCEEDS

        We will not receive any  proceeds  from the sales of common stock by the
selling stockholders pursuant to this prospectus.

                              SELLING STOCKHOLDERS

        The following table sets forth information with respect to the amount of
common stock held by each selling  stockholder as of the date of this prospectus
and the shares being offered by the selling  stockholders.  The table  indicates
the  nature of any  position,  office or other  material  relationship  that the
selling  stockholder  has  had  within  the  past  three  years  with  Discovery
Laboratories or any of its predecessors or affiliates.  This prospectus  relates
to the offer and sale of the selling stockholders of up

928158.3
                                       12

<PAGE>



to 2,917,784  shares of common stock,  including  928,910 shares of common stock
issuable  upon  the  exercise  of  outstanding   warrants  issued  by  Discovery
Laboratories.  The selling  stockholders  may offer all or part of the shares of
common  stock  covered by this  prospectus.  Information  with respect to shares
owned  beneficially  after the  offering  assumes  the sale of all of the shares
offered  and no other  purchases  or sales of common  stock.  The  common  stock
offered  by this  prospectus  may be  offered  from time to time by the  selling
stockholders named below.



928158.3
                                       13

<PAGE>



<TABLE>
<CAPTION>

                                    Number of
                                    Shares of                    Total
                                     Common        Number      Number of                     Number of                   Percentage
                                   Stock, not    of Shares     Shares of     Percentage    Shares to be    Number of       to be
                                    including   Represented      Common     Beneficially    Offered for   Shares to    Beneficially
                                    Warrants,   by Warrants      Stock         Owned        the Account    be Owned        Owned
                                  Beneficially  Beneficially  Beneficially     Before      of the Selling  after this    after this
      Name                            Owned        Owned         Owned +      Offering      Stockholder    Offering       Offering

<S>                                   <C>            <C>           <C>            <C>            <C>            <C>            <C>
Leonard Adams                          15,385         3,077         18,462        *               18,462        0              0
Louis Adler                             3,846           769          4,615        *                4,615        0              0
Burton Ahrens                           3,846           769          4,615        *                4,615        0              0
Balanced Investment LLC                76,923        15,385         95,308        *               95,308        0              0
Banque SCS Alliance SA                 76,923        15,385         95,308        *               95,308        0              0
Beck Family Partners LP                38,462         7,692         46,154        *               46,154        0              0
Nancy Beres                             1,538           308          1,846        *                1,846        0              0
David Bershad                          30,769         6,154         36,923        *               36,923        0              0
Elliott Broidy                         23,077         4,615         27,692        *               27,692        0              0
Richard Buonocore                       3,846           769          4,615        *                4,615        0              0
Mark Butler                             3,846           769          4,615        *                4,615        0              0
Andrew and Barbara Cichelli             7,692         1,538          9,230        *                9,230        0              0
Roger and Margaret Coleman              3,846           769          4,615        *                4,615        0              0
Concordia Partners LP                  76,923        15,385         95,308        *               95,308        0              0
Robert Conrads                          7,692         1,538          9,230        *                9,230        0              0
Archibald Cox, Jr.                     38,462         7,692         46,154        *               46,154        0              0
Credito Privato Commerciale SA        153,846        30,769        184,615        *              184,615        0              0
Deephaven Private Placement            23,077         4,615         27,692        *               27,692        0              0
Trading Ltd.
Elke R. DeRamirez                       7,692         1,538          9,230        *                9,230        0              0
Donner Corp. International              5,000             0          5,000        *                5,000        0              0
DG Lux Lacuna Apo Biotech Fund        123,077        24,615        147,692        *              147,692        0              0
John Joseph Dougherty                   3,846           769          4,615        *                4,615        0              0
Drax Holding, LP                      153,846        30,769        184,615        *              184,615        0              0
Marc Florin                            23,077         4,615         27,692        *               27,692        0              0
Albert Fried, Jr.                     230,769        46,154        276,923        1.33%          276,923        0              0
Wendy Grabler                          15,385         3,077         18,462        *               18,462        0              0
Greenlight Capital LP                  55,800        11,160         66,960        *               66,960        0              0
Greenlight Capital Offshore Ltd.       86,615        17,323        103,938        *              103,938        0              0
Greenlight Capital Qualified LP        88,354        17,671        106,025        *              106,025        0              0
Jack Hirschfield                        1,923           385          2,308        *                2,308        0              0
Theresa Incagnoli                       1,538           308          1,846        *                1,846        0              0
JAS Oil & Gas Partnership Ltd.          7,692         1,538          9,230        *                9,230        0              0
J.F. Shea & Co., Inc.                  76,923        15,385         95,308        *               95,308        0              0
Keys Foundation                        76,923        15,385         95,308        *               95,308        0              0
Ira Kotel                               3,959           769          4,728        *                4,615      113              *
Leiden Overseas Ltd.                    3,846           769          4,615        *                4,615        0              0
Kenneth Lerer                           3,105             0          3,105        *                3,105        0              0
Michael H. Schwartz Profit             15,385         3,077         18,462        *               18,462        0              0
Sharing Plan
Maria Molinsky                         15,385         3,077         18,462        *               18,462        0              0
Walter Montgomery                         690             0            690        *                  690        0              0
Cecilia and Raul Obregon                7,692         1,538          9,230        *                9,230        0              0
Omicron Partners, LP                   53,846        10,769         64,615        *               64,615        0              0
</TABLE>


928158.3
                                       14

<PAGE>



<TABLE>
<CAPTION>

                                    Number of
                                    Shares of                    Total
                                     Common        Number      Number of                     Number of                   Percentage
                                   Stock, not    of Shares     Shares of     Percentage    Shares to be    Number of      to be
                                    including   Represented      Common     Beneficially    Offered for   Shares to    Beneficially
                                    Warrants,   by Warrants      Stock         Owned        the Account    be Owned        Owned
                                  Beneficially  Beneficially  Beneficially     Before     of the Selling  after this     after this
      Name                            Owned        Owned         Owned +      Offering      Stockholder    Offering       Offering

<S>                                   <C>            <C>           <C>           <C>             <C>          <C>           <C>
Paramount Capital, Inc.1            2,387,609     1,100,501      3,488,110       16%             348,341      3,139,768     15.74%
PIMCO Opportunity Fund                461,538        92,308        553,846        2.66%          553,846        0              0
Richard Pollak                          7,692         1,538          9,230        *                9,230        0              0
Alexander Pomper                        7,692         1,538          9,230        *                9,230        0              0
Richard Power                           3,077           615          3,692        *                3,692        0              0
Dr. Tis Prager                          7,692         1,538          9,230        *                9,230        0              0
Royal Bank of Canada                  153,846        30,769        184,615        *              184,615        0              0
Linda Gosden Robinson                   3,105             0          3,105        *                3,105        0              0
Rahn & Bodmer                         153,846        30,769        184,615        *              184,615        0              0
David Ruttenberg                        7,692         1,538          9,230        *                9,230        0              0
Wayne Saker                            12,308         2,462         14,770        *               14,770        0              0
Scoggin Capital Management, LP         76,923        15,385         95,308        *               95,308        0              0
Lori Shapero                           11,538         2,308         13,846        *               13,846        0              0
John Siebel                             2,308           462          2,770        *                2,770        0              0
Simon Family Trust                      3,846           769          4,615        *                4,615        0              0
Southshore Capital Fund Ltd.           76,923        15,385         95,308        *               95,308        0              0
St John's Trust                        76,923        15,385         95,308        *               95,308        0              0
Stern Joint Venture LP                 76,923        15,385         95,308        *               95,308        0              0
Myron Teitelbaum                        3,846           769          4,615        *                4,615        0              0
The Moore Family Trust                 15,385         3,077         18,462        *               18,462        0              0
The Lincoln Fund Tax Advantage         11,538         2,308         13,846        *               13,846        0              0
LP
The Lincoln Fund, LP                   23,077         4,615         27,692        *               27,692        0              0
The Rapier Group, GP                    4,769           954          5,723        *                5,723        0              0
Sean C. Twomey                          2,308           462          2,770        *                2,770        0              0
Melvyn Weiss                           30,769         6,154         36,923        *               36,923        0              0
Robert Whetten                         11,538         2,308         13,846        *               13,846        0              0
Windward Venture Partners, Inc.        15,385         3,077         18,462        *               18,462        0              0
Yi Tuan & Brunstein                    10,504             0         10,504        *                3,036      7,468            *
</TABLE>


- ---------------
*       Less than 1%.

+       The information contained in this table reflects "beneficial"  ownership
        of common stock within the meaning of Rule 13d-3 under the Exchange Act.
        On April 19,  2000,  Discovery  Laboratories  had  20,707,804  shares of
        common stock outstanding.  Beneficial ownership information reflected in
        the table  includes  shares  issuable  upon the exercise of  outstanding
        warrants issued by Discovery Laboratories

- ----------------------------
1   Includes shares beneficially owned by RAQ, LLC and Aries Domestic Fund, L.P.
    ("Aries  Domestic")  and The Aries  Master Fund,  a Cayman  Island  Exempted
    Corporation  ("Aries  Fund" and,  together  with Aries  Domestic,  "Aries").
    Lindsay  Rosenwald is Chairman,  President and sole stockholder of Paramount
    Capital, Inc. ("Paramount Capital") and, as a result,  Paramount Capital may
    be deemed to share  beneficial  ownership of shares owned by Dr.  Rosenwald.
    Dr. Rosenwald is also Chairman,  President and sole stockholder of Paramount
    Capital Asset  Management,  Inc.  ("PCAM").  PCAM is the general  partner of
    Aries Domestic and the investment manager of Aries Fund. As a consequence of
    these  relationships,  each of Dr. Rosenwald and PCAM may be deemed to share
    beneficial  ownership of the Common Stock  beneficially  owned by Aries. Dr.
    Rosenwald is also the Managing Member of RAQ, LLC and,  accordingly,  may be
    deemed to have beneficial  ownership of the Common Stock  beneficially owned
    by RAQ, LLC. The placement  agent  warrants  pursuant to which the shares of
    Common Stock registered  hereby may be transferred to employees of Paramount
    Capital  and  placement  agent  warrants  granted in  connection  with prior
    placements  have been  transferred  to employees of Paramount  Capital.  Dr.
    Rosenwald  disclaims  beneficial  ownership of any securities  issuable upon
    exercise of warrants held by employees of Paramount Capital.

928158.3
                                       15

<PAGE>



                              PLAN OF DISTRIBUTION

        The shares of common stock covered by this  prospectus  are owned by the
selling stockholders. As used in the rest of this section of the prospectus, the
term "selling  stockholders"  includes the named selling stockholders and any of
their  pledgees,  donees,  transferees or other  successors in interest  selling
shares  received  from a  named  selling  stockholder  after  the  date  of this
prospectus. The selling stockholders may offer and sell, from time to time, some
or all of the  shares.  We have  registered  the shares for sale by the  selling
stockholders so that the shares will be freely  tradeable by them.  Registration
of the  shares  does not mean,  however,  that the  shares  necessarily  will be
offered or sold.  We will not receive any proceeds  from any offering or sale by
the selling stockholders of the shares. We will pay all costs, expenses and fees
in connection with the registration of the shares. The selling stockholders will
pay all brokerage commissions and similar selling expenses, if any, attributable
to the sale of the shares.

        The  selling  stockholders  will  act  independently  of  us  in  making
decisions  with respect to the timing,  manner and size of each sale. The shares
may be sold by or for the account of the selling  stockholders from time to time
in transactions on the Nasdaq SmallCap Market, the  over-the-counter  market, or
otherwise.  These sales may be at fixed prices or prices that may be changed, at
market  prices  prevailing  at the  time of sale,  at  prices  related  to these
prevailing  market  prices or at  negotiated  prices.  The shares may be sold by
means of one or more of the following methods:

     --   in a block trade in which a broker-dealer will attempt to sell a block
          of shares as agent but may  position and resell a portion of the block
          as principal to facilitate the transaction;

    --    purchases  by  a  broker-dealer   as  principal  and  resale  by  that
          broker-dealer for its account pursuant to this prospectus;

    --    on  markets  where  our  common  stock  is  traded  or in an  exchange
          distribution in accordance with the rules of the exchange;

    --    through broker-dealers, that may act as agents or principals;

    --    directly to one or more purchasers;

    --    through agents;

     --   in  connection  with the loan or pledge of shares to a  broker-dealer,
          and the sale of the  Shares  so  loaned  or the sale of the  Shares so
          pledged upon a default;

     --   in  connection  with  put  or  call  option  transactions,   in  hedge
          transactions,  and in settlement of other transactions in standardized
          or over-the-counter options;

    --    through  short  sales of the  Shares by the  selling  stockholders  or
          counterparties  to  those   transactions,   in  privately   negotiated
          transactions; or

     --   in any combination of the above.  In addition,  any of the shares that
          qualify for sale pursuant to Rule 144 under the  Securities Act may be
          sold under Rule 144 rather than pursuant to this prospectus.

     In effecting sales,  brokers or dealers engaged by the selling stockholders
may  arrange  for other  brokers or dealers to  participate.  The  broker-dealer
transactions may include:

    --    purchases of the shares by a broker-dealer as principal and resales of
          the  shares by the  broker-dealer  for its  account  pursuant  to this
          prospectus;

    --    ordinary brokerage transactions; or

    --    transactions in which the broker-dealer solicits purchasers.

928158.3
                                       16

<PAGE>



     If a material  arrangement with any broker-dealer or other agent is entered
into  for the  sale of any  Shares  through  a block  trade,  special  offering,
exchange  distribution,  secondary  distribution,  or a purchase  by a broker or
dealer,  a prospectus  supplement will be filed, if necessary,  pursuant to Rule
424(b) under the  Securities Act disclosing the material terms and conditions of
these arrangement.

     The selling  stockholders and any broker-dealers or agents participating in
the  distribution  of the shares may be deemed to be  "underwriters"  within the
meaning of the  Securities  Act, and any profit on the sale of the Shares by the
selling  stockholders and any commissions received by a broker-dealer or agents,
acting in this capacity, may be deemed to be underwriting  commissions under the
Securities  Act. The selling  stockholders  may agree to indemnify  any agent or
broker-dealer  that  participates in transactions  involving sales of the Shares
against certain liabilities,  including liabilities arising under the Securities
Act.

     The selling  stockholders  are not  restricted as to the price or prices at
which  they may sell  their  shares.  Sales of such  shares  may have an adverse
effect  on  the  market  price  of  the  common  stock.  Moreover,  the  selling
stockholders  are not  restricted as to the number of shares that may be sold at
any time,  and it is possible that a significant  number of shares could be sold
at the same time,  which may have an adverse  effect on the market  price of the
common stock.


                       WHERE YOU CAN FIND MORE INFORMATION

     We file annual,  quarterly and special reports,  proxy statements and other
information with the Securities and Exchange  Commission.  You may read and copy
any  document  we  file  at the  Securities  and  Exchange  Commission's  public
reference rooms at 450 Fifth Street, N.W., Washington, D.C. 20549, 7 World Trade
Center,  13th Floor,  New York, New York 10048,  and Citicorp  Center,  500 West
Madison  Street,  Suite 1400,  Chicago,  Illinois  60661- 2511.  Please call the
Securities and Exchange  Commission at 1-800-SEC-0330 for further information on
the public reference rooms. Our Securities and Exchange  Commission  filings are
also  available  to the public from the  Securities  and  Exchange  Commission's
Website at "http://www.sec.gov."

     We have filed with the  Securities  and Exchange  Commission a registration
statement  (which contains this prospectus) on Form S-3 under the Securities Act
of 1933. The registration  statement  relates to the common stock offered by the
selling  stockholders.  This  prospectus does not contain all of the information
set forth in the  registration  statement  and the exhibits and schedules to the
registration  statement.  Please  refer to the  registration  statement  and its
exhibits and schedules for further information with respect to us and the common
stock.  Statements  contained  in  this  prospectus  as to the  contents  of any
contract or other document are not  necessarily  complete and, in each instance,
we refer you to the copy of that contract or document filed as an exhibit to the
registration  statement.  You may  read and  obtain  a copy of the  registration
statement and its exhibits and schedules  from the  Commission,  as described in
the preceding paragraph.


                      INFORMATION INCORPORATED BY REFERENCE

     The  Securities  and  Exchange  Commission  allows  us to  "incorporate  by
reference" the  information we file with them,  which means that we can disclose
important  information  to  you  by  referring  you  to  those  documents.   The
information  incorporated  by  reference  is  considered  to  be  part  of  this
prospectus,  and information that we file later with the Securities and Exchange
Commission  will  automatically  update  and  supersede  this  information.   We
incorporate by reference the documents listed below and any filings we make with
the Securities and Exchange  Commission  after the date of this prospectus under
Section 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934:

     1. Our Annual Report on Form 10-KSB for the year ended December 31, 1999;

     2. Our Current Report on Form 8-K filed on February 8, 2000, March 7, 2000,
     March 20, 2000 and March 29, 2000; and


928158.3
                                       17

<PAGE>



     3. The  description of our capital stock contained in our Form 8-A as filed
        with the Securities and Exchange Commission on July 13, 1995.

     You may  request  a copy of  these  filings,  at no  cost,  by  writing  or
telephoning us at the following address: Discovery Laboratories, Inc., 305 South
Main Street,  Suite 307,  Doylestown,  Pennsylvania  18901,  Attention:  Cynthia
Davis.  Telephone  requests may be directed to (215)  340-4699,  extension  112.
Exhibits  to the  documents  will  not  be  sent,  unless  those  exhibits  have
specifically been incorporated by reference in this prospectus.

     This  prospectus  is part of a  registration  statement  we filed  with the
Securities  and  Exchange  Commission.  You should rely only on the  information
contained  in this  prospectus.  We have  authorized  no one to provide you with
different  information.  We are not making an offer of these  securities  in any
state  where  the  offer  is not  permitted.  You  should  not  assume  that the
information in this prospectus is accurate as of any date other than the date on
the front of the document.

                                     EXPERTS

     The consolidated financial statements of Discovery  Laboratories,  Inc. and
subsidiary  (the "Company") as of December 31, 1999 and for each of the years in
the  two-year  period  ended  December 31, 1999 and the period from May 18, 1993
(inception) through December 31, 1999 included in the Company's Annual Report on
Form 10-KSB,  incorporated by reference in this registration statement, and have
been  incorporated  herein in  reliance  on the report of  Richard  A.  Eisner &
Company, LLP, independent  auditors,  stated in their reports appearing therein.
These  financial  statements  have been given upon their authority as experts in
accounting and auditing.

                                  LEGAL MATTERS

     The validity of the shares of common stock  offered  hereby has been passed
upon for us by Battle Fowler LLP, New York, New York.



928158.3
                                       18

<PAGE>



We have not  authorized  anyone to provide you with  information or to represent
anything not contained in this prospectus. You must not rely on any unauthorized
information or representations.  The selling  stockholders are offering to sell,
and seeking  offers to buy,  only the shares of  Discovery  Laboratories  common
stock  covered  by  this  prospectus,   and  only  under  circumstances  and  in
jurisdictions  where it is lawful to do so. The  information  contained  in this
prospectus is current only as of its date, regardless of the time of delivery of
this prospectus or of any sale of the shares.


                                3,846,694 SHARES




                          DISCOVERY LABORATORIES, INC.


                                  COMMON STOCK


                                 April 20, 2000



928158.3
                                       19

<PAGE>



                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14.   Other Expenses of Issuance and Distribution

     The  following  table  sets  forth  the  various  expenses  payable  by the
Registrant in connection with the sale and  distribution of the securities being
registered  hereby.  Normal  commission  expenses and brokerage fees are payable
individually by the selling  stockholders.  All amounts are estimated except the
Commission registration fee.



                                                              Amount
SEC registration fee...............................     $             4,476.20
Accounting fees and expenses.......................     $             4,000.00
Legal fees and expenses............................     $            25,000.00
Miscellaneous fees and expenses....................     $             6,523.80
                                                    --------------------------
     Total.........................................     $            40,000.00
                                                    ==========================


Item 15.  Indemnification of Directors and Officers

     Section 145 of the  Delaware  General  Corporation  law empowers a Delaware
corporation  to  indemnify  any persons who are, or are  threatened  to be made,
parties  to  any  threatened,   pending  or  completed  legal  action,  suit  or
proceedings,  whether civil,  criminal,  administrative or investigative  (other
than action by or in the right of such corporation),  by reason of the fact that
such person was an officer or director of such corporation, or is or was serving
at the request of such corporation as a director,  officer, employee or agent of
another corporation or enterprise. The indemnity may include expenses (including
attorneys' fees),  judgments,  fines and amounts paid in settlement actually and
reasonably  incurred  by such person in  connection  with such  action,  suit or
proceeding,  provided that such officer or director acted in good faith and in a
manner he reasonably  believed to be in or not opposed to the corporation's best
interests and, for criminal proceedings,  had no reasonable cause to believe his
conduct was illegal. A Delaware corporation may indemnify officers and directors
in an action by or in the right of the  corporation  under the same  conditions,
except that no  indemnification  is permitted  without judicial  approval if the
officer  or  director  is  adjudged  to be  liable  to  the  corporation  in the
performance  of his duty.  Where an officer or  director  is  successful  on the
merits or  otherwise  in the  defense  of any  action  referred  to  above,  the
corporation  must  indemnify  him against  the  expenses  which such  officer or
director actually and reasonably incurred.

     In accordance with Delaware law, our restated  certificate of incorporation
contains a  provision  to limit the  personal  liability  of our  directors  for
violations of their fiduciary duty as a director. This provision eliminates each
director's  liability to us or our  stockholders for monetary damages except (i)
for any breach of each  director's  duty of  loyalty to us or our  stockholders,
(ii)  for  acts or  omissions  not in good  faith  or that  involve  intentional
misconduct  or a  knowing  violation  of law,  (iii)  under  Section  174 of the
Delaware  General  Corporation  law  providing  for  liability of directors  for
unlawful payment of dividends or unlawful stock purchases or redemptions or (iv)
for any transaction from which a director derived an improper  personal benefit.
The effect of this provision is to eliminate the personal liability of directors
for monetary  damages for actions  involving a breach of their fiduciary duty of
care, including any such actions involving gross negligence.



928158.3
                                      II-1

<PAGE>



Item 16.  Exhibits

EXHIBIT NO.                       DESCRIPTION

2.1*      Agreement and Plan of Merger dated as of March 5, 1998 among
          Discovery, ATI Acquisition Corp. and ATI.

2.2**     Agreement and Plan of Reorganization and Merger,  dated as of July 16,
          1997, by and between Discovery and Old Discovery.

5.1       Opinion of Battle Fowler LLP regarding the legality of the
          securities being registered.

23.1      Consent of Richard A. Eisner & Company, LLP.

24.1+     Powers of Attorney.

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

*    Incorporated  by reference to Discovery's  Annual Report on Form 10-KSB for
     the year ending December 31, 1998.

**   Incorporated by reference to Discovery's Registration Statement on Form S-4
     (File No. 333-34337).

+    Previously Filed.

Item 17.  Undertakings

     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 that 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  of 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.

     The undersigned Registrant hereby undertakes:

        (1)    To file,  during  any  period in which  offers or sales are being
               made, a post-effective amendment to the Registrant Statement:

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

        (ii)   To reflect in the  prospectus  any facts or events  arising after
               the  effective  date of the  Registration  Statement (or the most
               recent post-effective  amendment thereof) that individually or in
               the aggregate  represent a fundamental  change in the information
               set forth in the Registration Statement; and

        (iii)  To include any material  information  with respect to the plan of
               distribution   not  previously   disclosed  in  the  Registration
               Statement  or any  material  change  to such  information  in the
               Registration Statement;

provided,  however, that paragraphs (i) and (ii) do not apply if the information
required to be included in a post-  effective  amendment by those  paragraphs is
contained in periodic reports filed by the Registrant  pursuant to Section 13 or
15(d) of the Exchange Act that are incorporated by reference in the Registration
Statement.

928158.3
                                      II-2

<PAGE>



        (2)    That,  for the purpose of  determining  any  liability  under the
               Securities  Act,  each  such  post-effective  amendment  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.

        (3)    To  remove  from   registration  by  means  of  a  post-effective
               amendment any of the  securities  being  registered  which remain
               unsold at the termination of the offering.

        (4)    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 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.



928158.3
                                      II-3

<PAGE>



                                   SIGNATURES

     Pursuant to the  requirement  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 New York, New York, on the 20th day of April, 2000.


                                    DISCOVERY LABORATORIES, INC.
                                    (Registrant)


                                    By:  /s/ Robert J. Capetola, Ph.D.
                                        --------------------------------
                                            Robert J. Capetola, Ph.D.
                                            Chief Executive Officer


     KNOW ALL MEN BY THESE PRESENTS,  that each person whose  signature  appears
below   constitutes   and  appoints   each  of  Robert  J.   Capetola  and  Evan
Myrianthopoulis,  or any of  them,  each  acting  alone,  his  true  and  lawful
attorney-in-fact  and agent, with full power of substitution and resubstitution,
for such  person in his name,  place and stead,  in any and all  capacities,  in
connection with the  Registrant's  Registration  Statement on Form S-3 under the
Securities Act of 1933, as amended,  including,  without limiting the generality
of the foregoing,  to sign the Registration  Statement in the name and on behalf
of the  Registrant or on behalf of the  undersigned  as a director or officer of
the  Registrant,  and any and all amendments or supplements to the  Registration
Statement,  including any and all stickers and post-effective  amendments to the
Registration  Statement,  and  to  sign  any  and  all  additional  registration
statements  relating to the same  offering  of  securities  as the  Registration
Statement  that are filed  pursuant to Rule 462(b) under the  Securities  Act of
1933, as amended,  and to file the same,  with all exhibits  thereto,  and other
documents in connection  therewith,  with the Securities and Exchange Commission
and any  applicable  securities  exchange or  securities  self-regulatory  body,
granting unto said  attorneys-in-fact  and agents, each acting alone, full power
and  authority  to do and  perform  each and every act and thing  requisite  and
necessary  to be done in and about the  premises,  as fully to all  intents  and
purposes as he might or could do in person,  hereby ratifying and confirming all
that said attorneys-in-fact and agents, or their substitutes or substitute,  may
lawfully do or cause to be done by virtue hereof.

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


<TABLE>
<CAPTION>

               Signature                             Title                     Date
               ---------                             -----                     ----
<S>                                          <C>                          <C>
   /s/ Robert J. Capetola, Ph.D.            Chief Executive Officer       April 20, 2000
- --------------------------------
     Robert J. Capetola, Ph.D.

     /s/ Evan Myrianthopoulos               Vice President, Finance       April 20, 2000
- --------------------------------
       Evan Myrianthopoulos

        /s/ Cynthia Davis                         Controller              April 20, 2000
- --------------------------------        (Principal Accounting Officer)
           Cynthia Davis

/s/ Steve H. Kanzer, C.P.A., Esq.            Chairman of the Board        April 20, 2000
- --------------------------------
  Steve H. Kanzer, C.P.A., Esq.

      /s/ Richard G. Power                         Director               April 20, 2000
- --------------------------------
        Richard G. Power
</TABLE>


928158.3
                                      II-4

<PAGE>

<TABLE>
<CAPTION>

               Signature                             Title                     Date
               ---------                             -----                     ----
<S>                                                <C>                    <C>
 /s/ Marvin E. Rosenthale, Ph.D.                   Director               April 20, 2000
- --------------------------------
   Marvin E. Rosenthale, Ph.D.

                                                   Director               April __, 2000
- --------------------------------
       Mark C. Rogers, M.D.

     /s/ Herbert McDade, Jr.                       Director               April 20, 2000
- --------------------------------
        Herbert McDade, Jr.

                                                   Director               April __, 2000
- --------------------------------
         Max Link, Ph.D.

     /s/ David Naveh, Ph.D.                        Director               April 20, 2000
- --------------------------------
       David Naveh, Ph.D.

      /s/ Richard Sperber                          Director               April 20, 2000
- --------------------------------
        Richard Sperber
</TABLE>



928158.3
                                      II-5





                               BATTLE FOWLER LLP
                        A LIMITED LIABILITY PARTNERSHIP
                              75 East 55th Street
                          New York, New York 10022-305


                                 (212) 856-7000





                                 April 20, 2000


Board of Directors
Discovery Laboratories, Inc.
350 South Main Street, Suite 307
Doylestown, PA 18901

               Re:  Discovery Laboratories, Inc.
                    Public Offering of Common Stock
                    Registration Statement on Form S-3
                    ----------------------------------

Ladies and Gentlemen:

               We have acted as counsel for Discovery Laboratories, Inc., a
Delaware corporation (the "Company"), in connection with the preparation of the
registration statement on Form S-3, and any amendments thereto (the
"Registration Statement"), as filed with the Securities and Exchange Commission
under the Securities Act of 1933, as amended (the "Securities Act"), on April
20, 2000, for the registration under the Securities Act of up to 3,846,694
shares (the "Shares") of the Company's common stock, par value $0.001 per share
(the "Common Stock"), including 2,917,784 shares (the "Outstanding Shares") of
Common Stock which have been issued and are outstanding, an additional 580,569
shares (the "Class E Warrant Shares")of Common Stock which are issuable upon the
exercise of certain Class E warrants (the "Class E Warrants") and an additional
348,341 shares (the "Placement Agent Warrant Shares" and together with the Class
E Warrant Shares the "Warrant Shares")of Common Stock which are issuable upon
the exercise of certain placement agent warrants (the "Placement Agent
Warrants"). The Shares are to be offered on a delayed or continuous basis
pursuant to Rule 415 under the Securities Act by certain selling stockholders
(the "Selling Stockholders") named in the Registration Statement. Capitalized
terms used and not defined in this opinion have the meanings ascribed to them in
the Registration Statement. You have requested that we furnish our opinion as to
matters hereinafter set forth.



942192.1

<PAGE>

                                                                               2

Board of Directors
Discovery Laboratories, Inc.


               In rendering this opinion, we have relied upon, among other
things, our examination of such records of the Company, including without
limitation, the Company's Restated Certificate of Incorporation and the
Company's Bylaws and certificates of its officers and of public officials as we
have deemed necessary for the purpose of the opinion expressed below.

               In addition, we have assumed the genuineness of all signatures
and the authenticity of all documents submitted to us as originals, and the
conformity to original documents of all documents submitted to us as certified
or photostatic copies. As to various questions of fact material to this opinion,
we have relied, to the extent we deem reasonably appropriate, upon
representations or certificates of officers or directors of the Company and upon
documents, records and instruments furnished to us by the Company, without
independently checking or verifying the accuracy of such documents, records and
instruments furnished to us by the Company.

               We are not admitted to the practice of law in any jurisdiction
but the State of New York, and we do not express any opinion as to the laws of
other states or jurisdictions other than the laws of the State of New York, the
Delaware General Corporation Law and the federal law of the United States. No
opinion is expressed as to the effect that the law of any other jurisdiction may
have upon the subject matter of the opinion expressed herein under conflicts of
law principles, rules and regulations or otherwise.

               Based on and subject to the foregoing, we are of the opinion
that: (i) the Outstanding Shares offered by the Selling Stockholders pursuant to
the Registration Statement have been duly and validly authorized and issued and
are fully paid and nonassessable and (ii) the Warrant Shares offered by the
Selling Stockholders pursuant to the Registration Statement have been duly
authorized for issuance pursuant to the Class E Warrants and the Placement Agent
Warrants, and when issued and delivered in the manner described in the Class E
Warrants and the Placement Agent Warrants will be validly issued, fully paid and
nonassessable.

               We consent to the filing of this opinion with the Securities and
Exchange Commission as an exhibit to the Registration Statement and to the use
of our name under the caption "Legal Matters" in the Prospectus included
therein. In giving this consent, we do not admit that we are within the category
of persons whose consent is required by Section 7 of the Securities Act of 1933
or the rules and regulations promulgated thereunder by the Securities and
Exchange Commission.



942192.1

<PAGE>



                                                                               3

Board of Directors
Discovery Laboratories, Inc.

                                                   Very truly yours,

942192.1







                                                                    Exhibit 23.1



Independent Auditors' Consent


We consent to the incorporation by reference in this  Registration  Statement of
Discovery  Laboratories,  Inc.  (the  "Company") on Form S-3 of our report dated
February 25, 2000 (with respect to the last paragraph of Note A, March 23, 2000,
Note F[3], March 1, 2000, the second paragraph of Note G, March 14, 2000 and the
last  paragraph  of Note  G,  March  3,  2000)  on our  audit  of the  financial
statements  appearing in the Company's Annual Report on Form 10-KSB for the year
ended  December 31, 1999. We also consent to the reference  made to us under the
caption "Experts" in the Prospectus.



Richard A. Eisner & Company, LLP

New York, New York
April 19, 2000



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