Exhibit 99.1

                             Joint Filer Information

Names:        Perceptive Life Sciences Master Fund Ltd. and
              Perceptive Advisors LLC

IRS I.D. No.: 980338943 (Master Fund)                      52-2291758 (Advisors)

Address:      c/o First New York Securities, LLC
              850 Third Avenue, 8th Floor
              New York, New York 10022

Designated Filer:                           Joseph Edelman

Issuer and Ticker Symbol:                   Antares Pharama, Inc. (ANTR.OB)

Date of Event Requiring Statement           February 6, 2004
(Month/Day/Year)

The undersigned, Perceptive Life Sciences Master Fund Ltd. and Perceptive
Advisors LLC are jointly filing the attached Initial Statement of Beneficial
Ownership on Form 3 with Joseph Edelman with respect to the beneficial ownership
of securities of Antares Pharama, Inc.

    PERCEPTIVE LIFE SCIENCES                     PERCEPTIVE ADVISORS LLC
    MASTER FUND LTD.

    By: Perceptive Advisors LLC, its
          investment advisor


    By: /s/ Joseph Edelman                       By: /s/ Joseph Edelman
        -----------------------                      -----------------------
    Name:  Joseph Edelman                        Name:  Joseph Edelman
    Title: Managing Member                       Title: Managing Member