Document:

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                                                                    EXHIBIT 4.10

THIS WARRANT HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED, AND MAY NOT BE SOLD, PLEDGED OR OTHERWISE TRANSFERRED WITHOUT AN
EFFECTIVE REGISTRATION UNDER SUCH ACT OR PURSUANT TO AN EXEMPTION FROM THE
REGISTRATION REQUIREMENTS OF SAID ACT, SUPPORTED BY AN OPINION OF COUNSEL,
REASONABLY SATISFACTORY TO THE COMPANY AND ITS COUNSEL, THAT SUCH REGISTRATION
IS NOT REQUIRED.

                           WARRANT TO PURCHASE SHARES
                                OF COMMON STOCK
                            OF ANTARES PHARMA, INC.

Company:                   Antares Pharma, Inc. (formerly known as Medi-Ject
                           Corporation), a Minnesota corporation, (the
                           "Company") and any corporation that shall succeed to
                           the obligations of the Company under this Warrant

Number of Shares:          _____________
Class of Stock:            Common Stock
Per Share Exercise Price:  $7.032 per share
Expiration Date:           ___________, 2006
Date of Grant:             ___________, 2001

     THIS CERTIFIES THAT, for value received, _____________  is entitled to
purchase up to _______________ (_____) shares (as may be adjusted pursuant to
Section 5 hereof) of fully paid and nonassessable shares of Common Stock of the
Company for the Per Share Exercise Price set forth above (as may be adjusted
pursuant to Section 5 hereof) subject to the provisions and upon the terms and
conditions set forth herein.

1.   Definitions.  As used herein, the following terms, unless the context
     -----------
otherwise requires, shall have the following meanings:

     1.1.   "Act" shall mean the Securities Act of 1933, as amended, or any
            similar federal statute, and the rules and regulations promulgated
            thereunder, as shall be in effect at the time.

     1.2.   "Common Stock" shall mean shares of the presently authorized common
            stock, $.01 par value, of the Company and any stock into which such
            common stock may hereafter be exchanged.

     1.3.   "Holder" shall mean any person who shall at the time be the holder
            of this Warrant.
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     1.4.   "Per Share Exercise Price" shall be the amount set forth above as
            may be adjusted pursuant to Section 5 hereof.

     1.5.   "Warrant" shall mean the right to purchase the number of shares of
            Common Stock (as such number of shares may be adjusted and as such
            class of stock may be changed pursuant to the provisions hereof)
            represented by this Warrant.

2.   Term.  The purchase right represented by this Warrant is exercisable, in
     ----
     whole or in part, at any time on or before 5:00 p.m., Minneapolis local
     time, on the Expiration Date set forth above.

3.   Method of Exercise; Payment; Issuance of New Warrant.  Subject to Section 2
     ----------------------------------------------------
     hereof, the right represented by this Warrant may be exercised by the
     Holder, in whole or in part, by the surrender of this Warrant (with the
     Notice of Exercise attached hereto as Appendix A duly executed) at the
     principal office of the Company and by the payment to the Company, by check
     made payable to the Company drawn on a United States bank and for United
     States funds, of an amount equal to the aggregate exercise price for the
     number of shares for which this Warrant is being exercised. In the event of
     any exercise of the right represented by this Section 3, the Company will
     use its best efforts to deliver certificates for the shares so purchased to
     the Holder within five business days of receipt of such payment and, unless
     this Warrant has been fully exercised or expired, a new Warrant
     representing the portion of the shares, if any, with respect to which this
     Warrant shall not then have been exercised shall also be issued to the
     Holder within such five business day period. If any such exercise is
     rejected by the Company, the Company will promptly return to Holder all
     documentation furnished by the Holder hereunder.

4.   Per Share Exercise Price.  The Per Share Exercise Price at which this
     ------------------------
     Warrant may be exercised is set forth above.

5.   Adjustment of Number and Kind of Shares and Adjustment of Per Share
     -------------------------------------------------------------------
     Exercise Price.
     --------------

     5.1.   Reclassification, Reorganization, Consolidation or Merger.  In the
            ---------------------------------------------------------
            case of any reclassification of the Common Stock, or any
            reorganization, consolidation or merger of the Company with or into
            another corporation (other than a merger or reorganization with
            respect to which the Company is the continuing corporation and which
            does not result in any reclassification of the Common Stock), the
            Company, or such successor corporation, as the case may be, shall
            execute a new warrant, providing that the Holder shall have the
            right to exercise such new warrant and upon such exercise to
            receive, in lieu of each share of Common Stock theretofore issuable
            upon exercise of this Warrant, the number and kind of securities
            receivable upon such reclassification, reorganization, consolidation
            or merger by a holder of shares of the Common Stock of the Company
            for each share of Common Stock. Subject to any adjustment that may
            be made pursuant to subsection 5.2 hereof, the exercise price of the
            new warrant shall be the Per Share Exercise Price in effect
            immediately prior to the reclassification, reorganization,
            consolidation or merger. The provisions of this subsection 5.1 shall
            similarly apply to successive reclassifications, reorganizations,
            consolidations or mergers.
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     5.2.   Split, Subdivision or Combination of Shares. If the Company at any
            -------------------------------------------
            time while this Warrant remains outstanding and unexpired shall
            split, subdivide or combine the Common Stock, the Per Share Exercise
            Price shall be proportionately decreased in the case of a split or
            subdivision or proportionately increased in the case of a
            combination. Any adjustment under this subsection 5.2 shall become
            effective when the split, subdivision or combination becomes
            effective.

     5.3.   Adjustment of Number of Shares. Upon each adjustment in the Per
            ------------------------------
            Share Exercise Price pursuant to subsection 5.2, the number of
            shares issuable upon exercise of this Warrant shall be adjusted to
            the product obtained by multiplying the number of shares of Common
            Stock issuable immediately prior to such adjustment by a fraction
            (i) the numerator of which shall be the Per Share Exercise Price
            immediately prior to such adjustment, and (ii) the denominator of
            which shall be the Per Share Exercise Price immediately after such
            adjustment.

     5.4.   No Impairment. The Company will not, by amendment of its Articles of
            -------------
            Incorporation or through any reorganization, transfer of assets,
            consolidation, merger, dissolution, issue or sale of securities or
            any other voluntary action, avoid or seek to avoid the observance or
            performance of any of the terms to be observed or performed
            hereunder by the Company but will at all times in good faith assist
            in the carrying out of all the provisions of this Section 5 and in
            the taking of all such actions as may be necessary or appropriate in
            order to protect against impairment of the rights of the holder of
            this Warrant.

     5.5.   Notice of Adjustments. Whenever the Per Share Exercise Price or
            ---------------------
            number of shares purchasable under this Warrant shall be adjusted
            pursuant to Section 5 hereof, the Company shall issue a certificate
            signed by its Chief Financial Officer setting forth, in reasonable
            detail, the event requiring the adjustment, the amount of the
            adjustment, the method by which such adjustment was calculated and
            the Per Share Exercise Price and number of shares purchasable under
            this Warrant after giving effect to such adjustment, and shall cause
            a copy of such certificate to be mailed (by first class mail,
            postage prepaid) to the Holder.

6.   Compliance With Act; Transferability of Warrant; Disposition of Shares
     ----------------------------------------------------------------------

            6.1   Legends. Any shares issued upon exercise hereof shall be
                  -------
            imprinted with a legend in substantially the following form:

            "THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF
            1933, AS AMENDED, AND MAY NOT BE SOLD, PLEDGED OR OTHERWISE
            TRANSFERRED WITHOUT AN EFFECTIVE REGISTRATION THEREOF UNDER SUCH ACT
            OR PURSUANT TO AN EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF
            SAID ACT, SUPPORTED BY AN OPINION OF COUNSEL, REASONABLY
            SATISFACTORY TO THE COMPANY AND ITS COUNSEL, THAT SUCH REGISTRATION
            IS NOT REQUIRED."
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          6.2  Transferability and Non-negotiability of Warrant and Shares. This
               -----------------------------------------------------------
          Warrant and any shares issued upon exercise hereof may not be
          transferred or assigned in whole or in part without compliance with
          applicable federal and state securities laws by the transferor and the
          transferee (including the delivery of investment representation
          letters and legal opinions reasonably satisfactory to the Company, if
          reasonably requested by the Company).

7.   Reservation of Common Stock.  A number of shares of Common Stock to which
     ---------------------------
     this Warrant relates, sufficient to provide for the exercise of this
     Warrant upon the basis herein set forth, shall at all times be reserved for
     the exercise thereof.

8.   Miscellaneous.  No fractional shares shall be issued in connection with any
     -------------
     exercise hereunder, but in lieu of such fractional shares the Company shall
     make a cash payment therefor upon the basis of the Per Share Exercise Price
     then in effect.  The terms and provisions of this Warrant shall inure to
     the benefit of, and be binding upon, the Company and the Holder hereof and
     their respective successors and permitted assigns.  This Warrant shall be
     governed by and construed under the laws of the State of Minnesota.  The
     titles of the sections and subsections of this Warrant are for convenience
     only and are not to be considered in construing this Warrant.  All pronouns
     used in the Warrant shall be deemed to include masculine, feminine and
     neuter forms.

                            [Signature Page Follows]
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                          [Signature Page to Warrant]

                                        ANTARES PHARMA, INC.

                                        By:  _________________________________
                                             Dr.  Jacques Gonella
                                             Its: Chairman
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                                  APPENDIX A
                                  ----------

                              NOTICE OF EXERCISE
                              ------------------

TO:  _____________________

     1.   The undersigned hereby elects to purchase ______________ shares of
Common Stock of Antares Pharma, Inc., pursuant to terms of the attached Warrant,
and tenders herewith payment of the purchase price of such shares in full,
together with all applicable transfer taxes, if any.

     2.   Please issue a certificate or certificates representing said shares of
Common Stock in the name of the undersigned or in such other name as is
specified below:

     3.   The undersigned represents it is acquiring the shares of Common Stock
solely for its own account and not as a nominee for any other party and not with
a view toward the resale or distribution thereof.

                                   _____________________________________
                                   (Name)

                                   _____________________________________
                                   (Address)

                                   _____________________________________

                                   _____________________________________

                                   _____________________________________
                                   (U.S. Taxpayer Identification Number)

__________________________________
     [print name of Holder]

By:     __________________________

Title:  __________________________<PAGE>

                                                                    EXHIBIT 10.1

                              THIRD AMENDMENT OF
                           STOCK PURCHASE AGREEMENT

     THIS AMENDMENT is made as of January 31, 2001 by and among Medi-Ject
Corporation. a Minnesota corporation, ("Medi-Ject"); Permatec Holding AG, a
company organized under the laws of Switzerland ("Permatec"); Permatec Pharma
AG, a company organized under the laws of Switzerland ("Pharma"); Permatec
Technologie AG, a company organized under the laws of Switzerland
("Technologie"): and Permatec NV, a company organized under the laws of the
Netherlands Antilles ("NV") (Pharma, Technologie and NV sometimes being referred
to herein collectively as the "Subsidiaries" and individually as "Subsidiary").

                                  WITNESSETH:

     WHEREAS, Medi-Ject, Permatec and the Subsidiaries have entered into that
certain Stock Purchase Agreement dated July 14, 2000 (as amended, the "Stock
Purchase Agreement");

     WHEREAS, Medi-Ject, Permatec and the Subsidiaries desire to amend the Stock
Purchase Agreement as provided herein; and

     NOW, THEREFORE, in consideration of the premises and their mutual covenants
and agreements contained herein, and for other good and valuable consideration,
the receipt and sufficiency of which is hereby acknowledged, the parties hereto
agree as follows:

     1.   Amendment of Permatec Disclosure Schedule. Notwithstanding anything to
          -----------------------------------------
the contrary contained in the Stock Purchase Agreement, for purposes of
determining the accuracy and completeness of the representations and warranties
of Permatec and the Subsidiaries contained in the Stock Purchase Agreement as of
the Closing Date, the term "Permatec Disclosure Schedule" shall mean the
Permatec Disclosure Schedule contained in the Stock Purchase Agreement, as
modified by the Supplement to Permatec Disclosure Schedule dated January 31,
2001 and attached hereto as Exhibit A.

     1.   Amendment of Medi-Ject Disclosure Schedule. Notwithstanding anything
          ------------------------------------------
to the contrary contained in the Stock Purchase Agreement, for purposes of
determining the accuracy and completeness of the representations and warranties
of Medi-Ject contained in the Stock Purchase Agreement as of the Closing Date,
the term "Medi-Ject Disclosure Schedule" shall mean the Medi-Ject Disclosure
Schedule contained in the Stock Purchase Agreement, as modified by the
Supplement to Medi-Ject Disclosure Schedule dated January 31, 2001 and attached
hereto as Exhibit B.

     2.   Continuing Effect. The Stock Purchase Agreement, except as amended
          -----------------
hereby, shall be and remain in full force and effect.

                                       1
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     IN WITNESS WHEREOF, this Amendment has been executed as of the day and year
first above written.

                                    MEDI-JECT CORPORATION

                                    By: /s/ Franklin Pass
                                        -----------------
                                            Name:  Franklin Pass
                                            Title: Chairman and Chief Executive
                                                   Officer

                                    PERMATEC HOLDING AG

                                    By: /s/ Jacques Gonella
                                        -------------------
                                            Name:  Dr. Jacques Gonella
                                            Title: Chairman of the Group

                                    PERMATEC PHARMA AG

                                    By: /s/ Jacques Gonella
                                        -------------------
                                            Name:  Dr. Jacques Gonella
                                            Title: Chairman of the Group

                                    PERMATEC TECHNOLOGIE AG

                                    By: /s/ Jacques Gonella
                                        -------------------
                                            Name:  Dr. Jacques Gonella
                                            Title: Chairman of the Group

                                    PERMATEC NV

                                    By: /s/ Jacques Gonella
                                        -------------------
                                            Name:  Dr. Jacques Gonella
                                            Title: Chairman of the Group

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