Exhibit 4.1

                                    [FORM OF]

THE WARRANTS REPRESENTED BY THIS CERTIFICATE AND THE SECURITIES ISSUABLE UPON
EXERCISE THEREOF HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 OR
THE SECURITIES OR BLUE SKY LAWS OF ANY STATE. NEITHER SUCH WARRANTS NOR SUCH
SECURITIES MAY BE SOLD, PLEDGED, HYPOTHECATED OR OTHERWISE TRANSFERRED WITHOUT
SUCH REGISTRATION, EXCEPT UPON DELIVERY TO THE COMPANY OF SUCH EVIDENCE AS MAY
BE SATISFACTORY TO COUNSEL FOR THE COMPANY TO THE EFFECT THAT ANY SUCH TRANSFER
SHALL NOT BE IN VIOLATION OF THE SECURITIES ACT OF 1933 OR APPLICABLE STATE
SECURITIES OR BLUE SKY LAWS OR ANY RULE OR REGULATION PROMULGATED THEREUNDER.

                          DISCOVERY LABORATORIES, INC.

                    Class A Investor Warrant for the Purchase
                            of Shares of Common Stock

            FOR VALUE RECEIVED, DISCOVERY LABORATORIES, INC., a Delaware
corporation (the "Company"), hereby certifies that <<Fund>> (the "Holder"), its
designee or its permitted assigns is entitled to purchase from the Company, at
any time or from time to time commencing on September 20, 2003 and prior to 5:00
P.M., New York City time, on September 19, 2010 up to <<WarrantsAmt>>
(<<WarrantsWording>>) fully paid and non-assessable shares of Common Stock
(subject to adjustment), $.001 par value per share, of the Company for $6.875
per share (subject to adjustment as provided herein) and an aggregate purchase
price of <<AggregatePrice>>. (Hereinafter, (i) said common stock, $.001 par
value per share, of the Company, is referred to as the "Common Stock," (ii) the
shares of the Common Stock purchasable hereunder or under any other Warrant (as
hereinafter defined) are referred to as the "Warrant Shares," (iii) the
aggregate purchase price payable for the Warrant Shares purchasable hereunder is
referred to as the "Aggregate Warrant Price," (iv) the price payable for each of
the Warrant Shares is referred to as the "Per Share Warrant Price," (v) this
detachable Warrant, all similar Warrants issued on the date hereof and all
warrants hereafter issued in exchange or substitution for this Warrant or such
similar Warrants are referred to as the "Warrants," and (vi) the holder of this
Warrant is referred to as the "Holder" and the holder of this Warrant and all
other Warrants and Warrant Shares are referred to as the "Holders" and Holders
of more than 50% of the outstanding Warrants and Warrant Shares are referred to
as the "Majority of the Holders"). The Aggregate Warrant Price is not subject to
adjustment.

            By acceptance of this Warrant, the Holder agrees to comply with all
applicable provisions of this Warrant and the Stock and Warrant Purchase
Agreement entered into between Holder and the Company (the "Purchase Agreement")
to the same extent as if it were a party thereto.

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            1. Exercise of Warrant. (a) This Warrant may be exercised in whole
at any time, or in part from time to time, commencing on September 20, 2003 and
prior to 5:00 P.M., New York City time, on September 19, 2010, by the Holder by:

                  (i) the surrender of this Warrant (with the subscription form
at the end hereof duly executed) at the address set forth in Section 10(a)
hereof, together with proper payment of the Aggregate Warrant Price, or the
proportionate part thereof if this Warrant is exercised in part, with payment
for the Warrant Shares made by certified or official bank check payable to the
order of the Company; or

                  (ii) the surrender of this Warrant (with the cashless exercise
form at the end hereof duly executed) (a "Cashless Exercise") at the address set
forth in Section 10(a) hereof; provided, that a Cashless Exercise may only be
effected (i) during such time after June 19, 2004, that the prospectus used in
connection with the disposition of the Warrant Shares pursuant to the
Registration Statement (as defined in the Purchase Agreement) may not be used by
the Holder for the resale of the Warrant Shares either (A) because of the
exercise by the Company of its rights under Section 5.1(f) of the Purchase
Agreement or (B) because the Registration Statement is not effective, or (ii) if
(X) on or prior to the date of such Cashless Exercise, the trading of the
Company's Common Stock shall have met a Trading Threshold (as defined below),
and (Y) the Current Market Price (as defined below) exceeds by at least 300% the
Share Price (as such term is defined in the Purchase Agreement and subject to
appropriate adjustments in the event of any stock splits, combinations,
recapitalizations or similar events). A "Trading Threshold" shall be deemed to
occur on any date that the reported average Closing Sales Price (as defined
below) for any 20 out of 30 consecutive trading days immediately prior to such
date, including each of the final 10 consecutive trading days of such 30 day
period, exceeds by at least 300% the Share Price (as such term is defined in the
Purchase Agreement and subject to appropriate adjustment in the event of any
stock splits, combinations, recapitalizations or similar events), with a minimum
average daily trading volume for such 30 day period of at least $50,000 based
upon the closing sales price, regular way, as reported by Nasdaq for such
period. Such surrender shall be deemed a waiver of Holder's obligation to pay
the Aggregate Exercise Price, or the proportionate part thereof if this Warrant
is exercised in part. In the event of a Cashless Exercise, Holder shall exchange
this Warrant for that number of Warrant Shares subject to such Cashless Exercise
multiplied by a fraction, the numerator of which shall be the difference between
(A) the "Current Market Price," which is defined as the closing sale price of
the Common Stock on the trading day prior to the date of such surrender or, in
case no such reported sales take place on such day, the average of the last
reported bid and asked prices of the Common Stock on such day, in either case on
the principal national securities exchange on which the Common Stock is admitted
to trading or listed, or if not listed or admitted to trading on any such
exchange, the representative closing sale price of the Common Stock as reported
by Nasdaq, or other similar organization if Nasdaq is no longer reporting such
information, or, if the Common Stock is not reported on Nasdaq, the high per
share sale price for the Common Stock in the over-the-counter market as reported
by the National Quotation Bureau or similar organization, or if not so
available, the fair market value of the Common Stock as determined in good faith
by the Board of Directors of the Company (the "Board") and (B) the Per Share
Exercise Price, and the denominator of which shall be the Current Market Price.
For purposes of any computation under this Section 1(a), the Current Market
Price shall be based on the trading

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day immediately prior to the Cashless Exercise. The "Closing Sales Price" shall
be the reported per share closing sales price, regular way, of the Common Stock
on the Nasdaq SmallCap Market (or on the Nasdaq National Market or a national
securities exchange, as the case may be) at 4:00 PM New York Time on the
applicable trading day.

            (b) If this Warrant is exercised in part, this Warrant must be
exercised for a number of whole shares of the Common Stock and the Holder is
entitled to receive a new Warrant covering the Warrant Shares that have not been
exercised and setting forth the proportionate part of the Aggregate Warrant
Price applicable to such Warrant Shares.

            (c) Upon surrender of this Warrant, the Company will (i) issue a
certificate or certificates in the name of the Holder, or its nominee, for the
largest number of whole shares of the Common Stock to which the Holder shall be
entitled and, if this Warrant is exercised in whole, in lieu of any fractional
share of the Common Stock to which the Holder shall be entitled, pay to the
Holder cash in an amount equal to the fair value of such fractional share
(determined in such reasonable manner as the Board shall determine), and (ii)
deliver the other securities and properties receivable upon the exercise of this
Warrant, or the proportionate part thereof if this Warrant is exercised in part,
pursuant to the provisions of this Warrant.

            2. Reservation of Warrant Shares; Listing. The Company agrees and
covenants that, prior to the expiration of this Warrant, the Company shall at
all times (i) have authorized and in reserve, and shall keep available, solely
for issuance and delivery upon the exercise of this Warrant, the shares of the
Common Stock and other securities and properties receivable upon the exercise of
this Warrant and shall be validly issued and non-assessable, free and clear of
all restrictions on sale or transfer, other than under Federal or state
securities or blue sky laws, and free and clear of all preemptive rights and
rights of first refusal and (ii) use its best efforts to keep the Warrant Shares
authorized for listing on the Nasdaq National Market, the SmallCap Market or any
national securities exchange on which the Company's Common Stock is traded.

            3. Protection Against Dilution. (a) In the case the Company shall at
any time after the date of this Warrant (i) declare a dividend, or make a
distribution, on the outstanding Common Stock in shares of its Common Stock (ii)
subdivide the outstanding Common Stock, (iii) combine the outstanding Common
Stock into a smaller number of shares, or (iv) issue any shares of its capital
stock by reclassification of the Common Stock (including any such
reclassification in connection with a consolidation or merger in which the
Company is the continuing corporation), then, in each case, the Per Share
Warrant Price, and the number and kind of shares of Common Stock receivable upon
exercise of this Warrant, in effect as the time of the record date for such
dividend or distribution or of the effective date of such subdivision,
combination, or reclassification, shall be proportionately adjusted so that the
Holder after such time shall be entitled to receive the aggregate number and
kind of shares which if such Warrant had been exercised immediately prior to
such time, it would have owned upon such exercise and been entitled to receive
by virtue of such dividend, distribution, subdivision, combination or
reclassification.

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            (b) In case of any capital reorganization (including, but not
limited to, any spinoff,) or reclassification, or any consolidation or merger to
which the Company is a party, other than a merger or consolidation in which the
Company is the continuing corporation, or in case of any sale or conveyance to
another entity of all or substantially all of the property and assets of the
Company, or in the case of any statutory exchange of securities with another
corporation (including any exchange effected in connection with a merger of a
third corporation into the Company), or in case of any other transaction
pursuant to which holders of Common Stock of the Company are entitled to receive
(either directly or upon subsequent liquidation) stock, securities, cash or
other assets with respect to or in exchange for such shares of Common Stock
(other than regular cash distributions out of earned surplus), the Holder of
this Warrant shall have the right thereafter to receive upon the exercise of
this Warrant the kind and amount of securities, cash or other property which the
Holder would have owned or have been entitled to receive immediately after such
reorganization, reclassification, consolidation, merger, statutory exchange,
sale, conveyance or other transaction had this Warrant been exercised
immediately prior to the effective date of such reorganization,
reclassification, consolidation, merger, statutory exchange, sale, conveyance or
other transaction and in any such case, if necessary, appropriate adjustment
shall be made in the application of the provisions set forth in this Section 3
with respect to the rights and interests thereafter of the Holder of this
Warrant to the end that the provisions set forth in this Section 3 shall
thereafter correspondingly be made applicable, as nearly as may reasonably be,
in relation to any shares of stock or other securities or property thereafter
deliverable on the exercise of this Warrant. The above provisions of this
Section 3(b) shall similarly apply to successive reorganizations,
reclassifications, consolidations, mergers, statutory exchanges, sales,
conveyances or other transactions. Prior to the consummation of any such
reorganization, reclassification, consolidation, merger, statutory exchange,
sale, conveyance or other transaction, the Company shall make appropriate
provisions (in form and substance reasonably satisfactory to the Holders) to
require the issuer of any shares of stock or other securities or property
thereafter deliverable on the exercise of this Warrant to be responsible for all
of the agreements and obligations of the Company hereunder. Notice of any such
reorganization, reclassification, consolidation, merger, statutory exchange,
sale or conveyance and of said provisions so proposed to be made, shall be
mailed to the Holders of the Warrants not less than ten (10) days prior to such
event. A sale of all or substantially all of the assets of the Company for
consideration consisting primarily of securities shall be deemed a consolidation
or merger for the foregoing purposes.

            (c) No adjustment in the Per Share Warrant Price shall be required
unless such adjustment would require an increase or decrease of at least $0.01
per share of Common Stock; provided, however, that any adjustments which by
reason of this Section 3(c) are not required to be made shall be carried forward
and taken into account in any subsequent adjustment; provided, further, however,
that adjustments shall be required and made in accordance with the provisions of
this Section 3 (other than this Section 3(c)) not later than such time as may be
required in order to preserve the tax-free nature of a distribution to the
Holder of this Warrant or Common Stock issuable upon the exercise hereof. All
calculations under this Section 3 shall be made to the nearest cent or to the
nearest 1/100th of a share, as the case may be. Anything in this Section 3 to
the contrary notwithstanding, the Company shall be entitled to make such
reductions in the Per Share Warrant Price, in addition to those required by this
Section 3, as it in its discretion shall deem to be advisable in order that any
stock dividend,

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                                                                               5


subdivision of shares or distribution of rights to purchase stock or securities
convertible or exchangeable for stock hereafter made by the Company to its
stockholders shall not be taxable.

            (d) Whenever the Per Share Warrant Price is adjusted as provided in
this Section 3 and upon any modification of the rights of a Holder of Warrants
in accordance with this Section 3, the Company shall as promptly as practicable
prepare a brief statement of the facts requiring such adjustment or modification
and the manner of computing the same and cause copies of such certificate to be
mailed to the Holders of the Warrants. The Company may, but shall not be
obligated to unless requested by a Majority of the Holders, obtain, at its
expense, a certificate of a firm of independent public accountants of recognized
standing selected by the Board (who may be the regular auditors of the Company)
setting forth the Per Share Warrant Price and the number of Warrant Shares in
effect after such adjustment or the effect of such modification, a brief
statement of the facts requiring such adjustment or modification and the manner
of computing the same and cause copies of such certificate to be mailed to the
Holders of record of the Warrants.

            (e) If the Board of Directors of the Company shall declare any
dividend or other distribution with respect to the Common Stock other than an
ordinary cash distribution out of earned surplus, the Company shall mail notice
thereof to the Holders of the Warrants not less than ten (10) days prior to the
record date fixed for determining stockholders entitled to participate in such
dividend or other distribution.

            (f) If, as a result of an adjustment made pursuant to this Section
3, the Holder of any Warrant thereafter surrendered for exercise shall become
entitled to receive shares of two or more classes of capital stock or shares of
Common Stock and other capital stock of the Company, the Board (whose
determination shall be conclusive and shall be described in a written notice to
the Holder of any Warrant promptly after such adjustment) shall, in good faith,
determine the allocation of the adjusted Per Share Warrant Price between or
among shares or such classes of capital stock or shares of Common Stock and
other capital stock.

            (g) Upon the expiration of any rights, options, warrants or
conversion privileges with respect to the issuance of which an adjustment to the
Per Share Warrant Price had been made, if such shall not have been exercised,
the number of Warrant Shares purchasable upon exercise of this Warrant, to the
extent this Warrant has not then been exercised, shall, upon such expiration, be
readjusted and shall thereafter be such as they would have been had they been
originally adjusted (or had the original adjustment not been required, as the
case may be) on the basis of (A) the fact that Common Stock, if any, actually
issued or sold upon the exercise of such rights, options, warrants or conversion
privileges, and (B) the fact that such shares of Common Stock, if any, were
issued or sold for the consideration actually received by the Company upon such
exercise plus the consideration, if any, actually received by the Company for
the issuance, sale or grant of all such rights, options, warrants or conversion
privileges whether or not exercised; provided, however, that no such
readjustment shall have the effect of decreasing the number of Warrant Shares
purchasable upon exercise of this Warrant by an amount in excess of the amount
of the adjustment initially made in respect of the issuance, sale or grant of
such rights, options, warrants or conversion privileges.

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            (h) In case any event shall occur as to which the other provisions
of this Section 3 are not strictly applicable but as to which the failure to
make any adjustment would not fairly protect the purchase rights represented by
this Warrant in accordance with the essential intent and principles hereof then,
in each such case, the Board shall in good faith determine the adjustment, if
any, on a basis consistent with the essential intent and principles established
herein, necessary to preserve the purchase rights represented by the Warrants.
Upon such determination, the Company will as promptly as practicable mail a copy
thereof to the Holder of this Warrant and shall make the adjustments described
therein.

            (i) Except as may be set forth in this Section 3, no adjustment in
the Per Share Warrant Price or the number and kind of shares of Common Stock
receivable upon exercise of this Warrant shall be required in the case of the
issuance by the Company of any shares of Common Stock, including, without
limitation, pursuant to the exercise of any stock options or warrants.

            4. Fully Paid Stock; Taxes. The Warrant Shares delivered upon the
exercise of this Warrant shall at the time of such delivery, be duly authorized,
validly issued and outstanding, fully paid and non-assessable, and not subject
to preemptive rights or rights of first refusal, and the Company will take all
such actions as may be necessary to assure that the par value, if any, per
Warrant Shares is at all times equal to or less than the then Per Share Warrant
Price. The Company shall pay all documentary, stamp or similar taxes and other
similar governmental charges that may be imposed with respect to the issuance or
delivery of any Warrant Shares (other than income taxes); provided, however,
that if the Warrant Shares are to be delivered in a name other than the name of
the Holder, no such delivery shall be made unless the person requesting the same
has paid to the Company the amount of transfer taxes or charges incident
thereto, if any.

            5. Registration Under Securities Act of 1933. (a) The Holder shall
have the right to participate in the registration rights granted to Holders of
Registrable Securities (as defined in the Purchase Agreement) with respect to
the Warrant Shares.

            (b) Until all of the Warrant Shares have been sold under a
registration statement declared effective by the Securities and Exchange
Commission or pursuant to Rule 144, the Company shall use its best efforts to
file with the Securities and Exchange Commission all current reports and the
information as may be necessary to enable the Holder to effect sales of its
shares in reliance upon Rule 144 promulgated under the Securities Act of 1933,
as amended (the "Act").

            6. Investment Intent; Limited Transferability. (a) The Holder
represents, by accepting this Warrant, that it understands that this Warrant and
any securities obtainable upon exercise of this Warrant have not been registered
for sale under Federal or state securities or blue sky laws and are being
offered and sold to the Holder pursuant to one or more exemptions from the
registration requirements of such securities laws. In the absence of an
effective registration of such securities or an exemption therefrom, any
certificates for such securities shall bear the legend set forth on the first
page hereof. The Holder understands that it must bear the economic risk of its
investment in this Warrant and any securities obtainable upon

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exercise of this Warrant for an indefinite period of time, as this Warrant and
such securities have not been registered under Federal or state securities or
blue sky laws and therefore cannot be sold unless subsequently registered under
such laws, unless an exemption from such registration is available.

            (b) The Holder agrees and acknowledges that this Warrant, or any
portion thereof, and any such securities will not be sold or otherwise
transferred unless (i) a registration statement with respect to such transfer is
effective under the Act and any applicable state securities or blue sky laws or
(ii) such sale or transfer is made pursuant to one or more exemptions from the
Act.

            (c) The Holder agrees and acknowledges that in addition to the
limitations set forth in the Purchase Agreement with respect to Registrable
Securities, this Warrant may not be sold, transferred, assigned or hypothecated
by the Holder except in compliance with the provisions of the Act and the
applicable state securities or blue sky laws, and is so transferable only upon
the books of the Company which it shall cause to be maintained for such purpose.
The Company may treat the registered Holder of this Warrant as it appears on the
Company's books at any time as the Holder for all purposes. The Company shall
permit any Holder of a Warrant or its duly authorized attorney, upon written
request during ordinary business hours, to inspect and copy or make extracts
from its books showing the registered holders of Warrants. All Warrants issued
upon the transfer or assignment of this Warrant will be dated the same date as
this Warrant, and all rights of the holder thereof shall be identical to those
of the Holder.

            (d) The Holder represents that it has been afforded (i) the
opportunity to ask such questions as it has deemed necessary of, and to receive
answers from, representatives of the Company concerning the terms and conditions
of the Warrants or the exercise of the Warrants and the finance operations and
business of the Company; and (ii) the opportunity to request such additional
information which the Company possesses or can acquire without unreasonable
effort or expense. Nothing contained in this Section 6(d) shall alter, amend or
change Holder's reliance on the representations, covenants or warranties
contained herein.

            (e) The Holder represents that it did not (i) receive or review any
advertisement, article, notice or other communication published in a newspaper
or magazine or similar media or broadcast over television or radio, whether
closed circuit, or generally available; or (ii) attend any seminar, meeting or
investor or other conference whose attendees were, to such Holder's knowledge,
invited by any general solicitation or general advertising.

            (f) The Holder represents that it is an "accredited investor" within
the meaning of Regulation D promulgated under the Act. Such Holder is acquiring
the Warrants for its own account and not with a present view to, or for sale in
connection with, any distribution thereof in violation of the registration
requirements of the Act, without prejudice, however, to such Holder's right,
subject to the provisions of the Purchase Agreement and this Warrant, at all
times to sell or otherwise dispose of all or any part of the Warrants and
Warrant Shares.

            (g) The Holder represents that it, either by reason of such Holder's
business or financial experience or the business or financial experience of its
professional advisors (who are

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unaffiliated with and who are not compensated by the Company or any affiliate,
finder or selling agent of the Company, directly or indirectly), has such
sophistication, knowledge and experience in financial and business matters as to
be capable of evaluating the merits and risks of its investment in the Company
and the capacity to protect such Holder's interests in connection with the
transactions contemplated by this Warrant and the Purchase Agreement.

            (h) The Holder represents that it has the ability to bear the
economic risks of its investment for an indefinite period of time and could
afford a complete loss of its investment.

            (i) The Holder agrees and acknowledges that the representations made
by the Holder in this Section 6 are conditions to the exercise of the Warrant.

            7. Optional Redemption. From and at any time after the occurrence of
a Trading Threshold, the Company shall be entitled to redeem the Warrants, or
any of them, at a per Warrant Share redemption price of $0.001 (the "Redemption
Price"), upon 60 days' written notice to the Holder. Hereinafter such 60-day
period, as it may be extended pursuant to this Section 7, is referred to as the
"Redemption Period". Upon the expiration of the Redemption Period (the
"Redemption Date"), all Warrants noticed for redemption that have not
theretofore been exercised by the Holder shall, upon payment of the aggregate
Redemption Price therefore, cease to represent the right to purchase any shares
of Common Stock and shall be deemed cancelled and void and of no further force
or effect without any further act or deed on the part of the Company.
Notwithstanding the preceding, in the event that the Redemption Date is less
than 30 days later than the date that a registration statement filed in
accordance with the Holder's registration rights as set forth in Section 5 first
becomes effective (the "Trading Date"), the Company may not redeem the Holder's
Warrants until no less than 30 days have passed after the Trading Date. The
Holder undertakes to return the certificate representing any redeemed Warrants
to the Company upon their redemption and to indemnify the Company with respect
to any losses, claims, damages or liabilities arising from the Holder's failure
to return such certificate. In the event the certificate so returned represents
a number of Warrants in excess of the number being redeemed, the Company shall
as promptly as practicable issue to the Holder a new certificate for the number
of unredeemed Warrants. If at any time during the Redemption Period, the
prospectus used in connection with the disposition of the Warrant Shares
pursuant to the Registration Statement (as defined in the Purchase Agreement)
may not be used by the Holder for the resale of the Warrant Shares either (i)
because of the exercise by the Company of its rights under Section 5.1(f) of the
Purchase Agreement or (ii) because the Registration Statement is not effective,
then the Redemption Period shall be extended by the period of time that the
Holder may not so use the prospectus.

            8. Loss, etc., of Warrant. Upon receipt of evidence satisfactory to
the Company of the loss, theft, destruction or mutilation of this Warrant, and
of indemnity reasonably satisfactory to the Company, if lost, stolen or
destroyed, and upon surrender and cancellation of this Warrant, if mutilated,
the Company shall execute and deliver to the Holder a new Warrant of like date,
tenor and denomination.

            9. Warrant Holder Not Stockholder. This Warrant does not confer upon
the Holder any right to vote on or consent to or receive notice as a stockholder
of the Company,

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as such, in respect of any matters whatsoever, nor any other rights or
liabilities as a stockholder, prior to the exercise hereof; this Warrant does,
however, require certain notices to Holders as set forth herein.

            10. Notices of Record Date, Etc. In addition to the notice
requirements set forth in Section 3 hereof, the event that the Company shall
propose at any time to effect or to establish (i) a record date for the holders
of its Common Stock for the purpose of entitling them to receive any dividend or
other distribution, or any right to subscribe for, purchase or otherwise acquire
any shares or stock of any class or any other securities or to receive any other
right; or (ii) any voluntary or involuntary dissolution, liquidation or
dissolution of the Company, then notice of any such proposed action shall be
mailed to the Holders of the Warrants not less than ten (10) days prior to such
event.

            11. Communication. No notice or other communication under this
Warrant shall be effective unless, but any notice or other communication shall
be effective and shall be deemed to have been given if, the same is in writing
and is mailed by first-class mail, postage prepaid, addressed to:

            (a) the Company at Discovery Laboratories, Inc., 350 South Main
      Street, Suite 307, Doylestown, Pennsylvania 18901, Attn: David L. Lopez,
      C.P.A., Esq., Vice President and General Counsel or such other address as
      the Company has designated in writing to the Holder, or

            (b) the Holder at <<Fund>>, <<Address1>>, <<Address2>>, <<City>>,
      <<State>> <<PostalCode>> Attn: <<FirstName>> <<LastName>> or other such
      address as the Holder has designated in writing to the Company.

            12. Headings. The headings of this Warrant have been inserted as a
matter of convenience and shall not affect the construction hereof.

            13. Applicable Law. This Warrant shall be governed by and construed
in accordance with the laws of the State of Delaware without giving effect to
the principles of conflicts of law thereof.

            14. Amendment, Waiver, etc. Except as expressly provided herein,
neither this Warrant nor any term hereof may be amended, waived, discharged or
terminated other than by a written instrument signed by the party against whom
enforcement of any such amendment, waiver, discharge or termination is sought.

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      IN WITNESS WHEREOF, the Company has caused this Warrant to be executed
this 20th day of June, 2003.

                                  DISCOVERY LABORATORIES, INC.


                                  By:
                                     ---------------------------------
                                  Name:  Robert J. Capetola, Ph.D.
                                  Title: President and Chief Executive Officer

<PAGE>

                                  SUBSCRIPTION

            The undersigned, ___________________, pursuant to the provisions of
the foregoing Warrant, hereby elects to exercise such Warrant by agreeing to
subscribe for and purchase ____________________ shares (the "Warrant Shares") of
Common Stock, par value $.001 per share, of Discovery Laboratories, Inc. (the
"Company"), and hereby makes payment of $___________ by certified or official
bank check in payment of the exercise price therefor.

            As a condition to this subscription, the undersigned hereby
represents and warrants to the Company that the representations and warranties
of Section 6 of the Warrant are true and correct as of the date hereof as if
they had been made on such date with respect to the Warrant Shares. The
undersigned further acknowledges that the sale, transfer, assignment or
hypothecation of the Warrant Shares to be issued upon exercise of this Warrant
is subject to the terms and conditions contained in Sections 1 and 6 of this
Warrant.

Dated:_______________                       Signature:____________________

                                            Address:______________________

                                                    ______________________

                                CASHLESS EXERCISE

            The undersigned, ___________________, pursuant to the provisions of]
the foregoing Warrant, hereby elects to exercise such Warrant by agreeing to
subscribe for and purchase ____________________ shares (the "Warrant Shares") of
Common Stock, par value $.001 per share, of Discovery Laboratories, Inc. (the
"Company"), pursuant to the Cashless Exercise provisions of the Warrant.

            As a condition to this subscription, the undersigned hereby
represents and warrants to the Company that the representations and warranties
of Section 6 of the Warrant are true and correct as of the date hereof as if
they had been made on such date with respect to the Warrant Shares. The
undersigned further acknowledges that the sale, transfer, assignment or
hypothecation of the Warrant Shares to be issued upon exercise of this Warrant
is subject to the terms and conditions contained in Sections 1 and 6 of this
Warrant.

Dated:_______________                       Signature:____________________

                                            Address:______________________

                                                    ______________________

<PAGE>

                                   ASSIGNMENT

            FOR VALUE RECEIVED _______________ hereby sells, assigns and
transfers unto ____________________ the foregoing Warrant and all rights
evidenced thereby, and does irrevocably constitute and appoint
_____________________, attorney, to transfer said Warrant on the books of
Discovery Laboratories, Inc. (the "Company"). As a condition to this assignment,
the Holder acknowledges that its assignee must deliver a written instrument to
the Company that the representations and warranties of Section 6 of the Warrant
are true and correct as of the date hereof as if they had been made by such
assignee on such date with respect to the Warrants.

Dated:_______________                       Signature:____________________

                                            Address:______________________

                                                    ______________________

                               PARTIAL ASSIGNMENT

            FOR VALUE RECEIVED _______________ hereby assigns and transfers unto
____________________ the right to purchase _______ shares of the Common Stock,
par value $.001 per share, of Discovery Laboratories, Inc. (the "Company"), as
set forth in the foregoing Warrant, and a proportionate part of said Warrant and
the rights evidenced thereby, and does irrevocably constitute and appoint
____________________, attorney, to transfer that part of said Warrant on the
books of the Company. As a condition to this assignment, the Holder acknowledges
that its assignee must deliver a written instrument to the Company that the
representations and warranties of Section 6 of the Warrant are true and correct
as of the date hereof as if they had been made by such assignee on such date
with respect to the Warrants.

Dated:_______________                       Signature:____________________

                                            Address:______________________

                                                    ______________________