DISCOVERY LABORATORIES INC /DE/
424B3, 1999-11-04
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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                                                Filed pursuant to Rule 424(b)(3)
                                                          SEC File No. 333-86105

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PROSPECTUS

                                7,192,870 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 November 4, 1999.














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                                TABLE OF CONTENTS

                                                                            Page
                                                                            ----

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

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

Risk Factors...................................................................2

Forward-Looking Statements.....................................................9

Use of Proceeds...............................................................10

Selling Stockholders..........................................................10

Plan of Distribution..........................................................12

Where You Can Find More Information...........................................13

Information Incorporated by Reference.........................................13

Experts.......................................................................14

Legal Matters.................................................................14


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                               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 for use by newborn  infants in the  hospital.  We are also
developing  our lead product  candidate for the  treatment of acute  respiratory
distress  syndrome  and  acute  lung  injury.  The  cause of these  diseases  is
inflammation  of the lungs.  We are directing both our drug  candidates to treat
respiratory  diseases which affect the ability of the lungs to absorb oxygen. We
may seek to enter into  collaborations with corporate partners for manufacturing
and marketing these drugs.

     Our lead product is Surfaxin(R).  Surfaxin(R) is a peptide or small protein
molecule formulation of an artificial lung surfactant.  We patterned Surfaxin(R)
after a human  surfactant  protein.  Surfactants  are substances  that the lungs
produce.  Surfactants  lower the surface  tension of the fluid normally  present
within  the  air  sacs  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  conditions
characterized  by  insufficient  surfactants.  The FDA has approved  replacement
surfactants  only  for  treating  respiratory  distress  syndrome  in  premature
infants. In addition, infants born with meconium in their lungs also suffer from
insufficient  surfactant.  Meconium is the baby's  first  bowel  movement in the
mother's womb. This condition can lead to meconium aspiration syndrome.  Both of
these conditions can be life-threatening as a result of the failure of the lungs
to absorb sufficient oxygen.  Patients with acute respiratory  distress syndrome
and acute lung injury also typically  suffer from surfactant  deficiency.  Acute
respiratory distress syndrome and acute lung injury can result from a variety of
events.  Some of these  events are  pneumonia,  breathing in the contents of the
stomach, trauma, smoke inhalation and head injury.

     We are also developing  SuperVent(TM) as a therapy for airway diseases such
as cystic fibrosis and chronic bronchitis.  We deliver SuperVent(TM) to patients
using a nebulizer.  A nebulizer is a device which turns liquid into mist, making
it breathable. We anticipate using SuperVent(TM) for the treatment of conditions
involving by 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  minimizes  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 treatment of Meconium
aspiration  syndrome,  acute respiratory distress syndrome and acute lung injury
and SuperVent(TM) for treatment of cystic fibrosis. We entered into a sublicense
agreement  for  Surfaxin(R)  in the  territories  of  southern  Europe and Latin
America.

     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.



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                                  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
pharmaceutical  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,
preclinical  studies,  clinical testing and regulatory approval for our products
under  development  prior  to  their  commercialization.  We  may  fail  in  the
development  and   commercialization  of  our  products.   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. We
cannot assure you that:

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

     --   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 cannot provide
assurance that we will obtain these types of  arrangements.  We have not entered
into arrangements to obtain any additional  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 would  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."


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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 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. 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 Is to Enter into  Collaboration  Agreements with Third Parties with
Respect to Our Products and We 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  depends  upon  entering  into  collaboration
arrangements with pharmaceutical  companies. We have entered into an arrangement
for  Surfaxin(R)  covering  southern  Europe and Latin America.  We will need to
enter into  additional  collaboration  agreements.  Our success will depend upon
obtaining partners.  In addition,  we will 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  commercialize   pharmaceutical   products  developed  under   collaboration
agreements. Those rights would limit our flexibility in considering alternatives
for the  commercialization  of our products.  If we fail to successfully develop
these  relationships  or if  our  collaboration  partners  fail  to  develop  or
commercialize  successfully 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 market. 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.


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     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  patents  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   application   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 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 depends significantly 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
application is 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.

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     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;

     --   we would obtain adequate remedies for this type of breach; or

     --   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 may also enter into  arrangements  with
other manufacturers for the manufacture of material for use in clinical testing.

     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.

     In  addition,  the FDA  and  foreign  regulatory  authorities  require  our
third-party  manufacturers  to register  manufacturing  facilities.  The FDA and
corresponding foreign regulations inspect these facilities to confirm compliance
with good  manufacturing  practice  requirements  that the FDA or  corresponding
foreign regulations 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  experience and
personnel  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.

     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

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agreements  with other key personnel with  termination  dates in 2001. We do not
maintain keyman 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. 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  competitive.  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.

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  SuperVent(TM)  and our clinical
trials of Surfaxin(R) in treating acute respiratory  distress syndrome and acute
lung injury and Meconium aspiration syndrome.  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

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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, if ever. 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  payers 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 negative impact on
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  payers  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
payers  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  August  13,  1999,  our  directors,  executive  officers,  principal
stockholders  and  affiliated  entities  beneficially  own,  in  the  aggregate,
approximately 34% of our outstanding voting securities,  assuming  conversion of
convertible  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.

     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),

          (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.


889089.1
                                        7

<PAGE>



At June 30, 1999, we had  $2,090,000  in net tangible  assets.  In addition,  we
received  net proceeds of  approximately  $2.45  million in a private  placement
completed in July 1999.  The closing price of our common stock during the period
from  January 1, 1999 to  September  27, 1999 ranged from $1.00 to $4.00 and the
closing price of our common stock on October 26, 1999 was $1.75. We will 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.

     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 August 10,  1999,  there were  approximately  9,064,881  shares of
common  stock  currently  outstanding.  In  addition as of August 10. 1999 up to
10,951,289  shares of Common  Stock were  issuable on  exercise  of  outstanding
options,  warrants and  convertible  preferred  stock.  Additionally,  shares of
Series C preferred stock are convertible into approximately  1,775,821 shares of
common stock based on the market price of the common stock as of June 1, 1999.

     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

889089.1
                                        8

<PAGE>



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.

Antitakeover  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  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.

The Year 2000 Issue Could Affect Our  Computer  Systems,  Which Would  Adversely
Affect Our Research and Development.

     The Year 2000 Issue is the result of computer  programs being written using
two digits rather than four to define the applicable year. Any computer programs
or hardware that have date-sensitive  software or embedded chips may recognize a
date using "00" as the year 1900 rather than the year 2000.

     In terms of our internal operations,  we do not use equipment with embedded
chip  technology  that is date  sensitive.  We expect that by the Year 2000 date
change  may  affect  some  of our  licensed  systems,  including  the  database,
networking  and  accounting  software  which  we  license.  We  expect  to incur
out-of-pocket costs related to making inquiries of, and receiving  confirmations
from, third parties of no more than $10,000.

     If our computer  systems or the computer  systems of any of our  suppliers,
customers or other third parties are not Year 2000 compliant or if those systems
are unable to recover  from system  interruptions  that may result from the Year
2000 date change it could delay or adversely affect our research and development
of our product candidates.


                           FORWARD-LOOKING STATEMENTS

     This prospectus may contain  forward-looking  statements within the meaning
of Section 27A of the  Securities  Act of 1933 and Section 21E of the Securities
Exchange  Act of 1934.  Forward-looking  statements  are  subject  to risks  and
uncertainties.  Those  risks  and  uncertainties  may  cause  us to have  actual
results,   performance  or  achievements  which  are  different  from  what  the
forward-looking  statements  express or imply.  Forward-looking  statements  are
statements  which  we  based on  assumptions  and  describe  our  future  plans,
strategies and expectations.

889089.1
                                        9

<PAGE>



Forward-looking statements are generally identifiable by use of the words "may,"
"will," "should,"  "expect,"  "anticipate,"  "estimate,"  "believe," "intend" or
"project" or comparable terminology.


                                 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 to 7,192,870  shares of
common  stock,  including  2,759,189  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.

889089.1
                                       10

<PAGE>
<TABLE>
<CAPTION>
<S>                                     <C>             <C>              <C>                 <C>            <C>    <C>


                                    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
               ----                  ------        ------        ------       ---------      ------------    ---------     --------
Moonlight International, Ltd......    165,289      165,289       330,578         4.9%          330,578             0          *
Dr. Tis Prager....................     41,322       41,322        82,644         1.2%           82,644             0          *
Keys Foundation...................    165,289      165,289       330,578         4.9%          330,578             0          *
Finsbury Worldwide
Pharmaceutical Trust..............    826,446      826,446     1,652,892        20.0%        1,652,892             0          *
Caduceus Capital II, L.P..........    165,289      165,289       330,578         4.9%          330,578             0          *
Winchester Global Trust
Company Ltd.......................    661,157      661,157     1,322,314        16.7%        1,322,314             0          *
Windward Venture Partners.........     83,645       56,903       139,548         2.0%          139,548             0          *
Benjamin Bollag...................     61,693       42,677       104,370         1.5%          104,370             0          *
Michael Bollag....................     61,693       42,677       104,370         1.5%          104,370             0          *
Concordia Partners L.P............    310,954       56,903       367,857         4.6%          139,548       175,117       2.6%
Aries Domestic Fund, L.P..........    385,576      117,529       503,105         7.4%          230,253       272,852       4.1%
The Aries Master Fund.............    907,012      274,237     1,181,249        17.0%          537,258       643,991       9.7%
126736 Canada, Inc................    378,358            0        69,773         4.2%           69,773             0       3.4%
CPC Offshore Equity
Fund I LTD........................     41,322       28,451        69,773         1.0%           69,773             0          *
Johnson & Johnson Inc.............    205,846            0       205,846         3.0%          205,846             0          *
Paramount Capital Inc.............          0      404,958       404,958         5.0%          404,958             0          *
Brobeck, Phleger & Harrison LLP...     14,000            0        14,000         0.21%          14,000             0          *
Yi, Tuan & Brunstein..............      4,850            0         4,850         0.07%           4,850             0          *
Scripps Research Institute........    117,500            0       117,000         1.7%          117,000             0          *
RAQ, LLC                            1,001,739            0     1,001,739        15.2%        1,001,739             0          *

</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
     August 13, 1999,  Discovery  Laboratories  had  9,064,889  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.

889089.1
                                       11

<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.

889089.1
                                       12

<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  and  10-KSB/A  for the year ended
          December 31, 1998;

     2.   Our  Quarterly  Reports  on Form  10-Q-SB  and Form  10-QSB/A  for the
          quarter ended March 31, 1999;

     3.   Our  Quarterly  Report on Form 10Q-SB for the  quarter  ended June 30,
          1999;

889089.1
                                       13

<PAGE>



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

     5.   Our  current  report  on Form 8-K as filed  with  the  Securities  and
          Exchange Commission on August 9, 1999.

     6.   Our  current  report  on Form 8-K as filed  with  the  Securities  and
          Exchange Commission on October 15, 1999.

     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, Doylestown, Pennsylvania 18901, Attention: Cynthia Davis. Telephone
requests may be directed to (215)  340-4699.  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  as of
December  31, 1998 and each of the years in the two-year  period ended  December
31, 1998 and the period from May 18, 1993 (inception)  through December 31, 1998
incorporated  by reference in this  registration  statement have been audited by
Richard A. Eisner & Company,  LLP ("RAE"),  independent  auditors,  as stated in
their  reports  appearing  therein.  These  financial  statements  have  been so
included in reliance on the reports of RAE given on 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.




889089.1
                                       14

<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.


                                7,192,870 SHARES




                          DISCOVERY LABORATORIES, INC.


                                  COMMON STOCK


                                NOVEMBER 4, 1999

889089.1
                                       15


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