EXHIBIT 99.1 AGREEMENT REGARDING JOINT FILING UNDER UNDER RULE 13D-1(K) OF THE EXCHANGE ACT In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, each of the undersigned agrees to the filing on behalf of each of a...

                                                                 EXHIBIT 99.1

                     AGREEMENT REGARDING JOINT FILING UNDER
                     UNDER RULE 13D-1(K) OF THE EXCHANGE ACT


In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as
amended, each of the undersigned agrees to the filing on behalf of each of a
Statement on Schedule 13G, and all amendments thereto, with respect to the
shares of Common Stock of Medicure Inc.


Date:  October 21, 2004



                                     Leeward Offshore Bull & Bear Fund



                                     By:
                                          ------------------------------
                                            Name:
                                            Title:  Director


                                     Leeward Hedge Funds Inc.



                                     By:
                                          ------------------------------
                                            Name:   ▇▇▇▇▇▇▇ ▇▇▇▇
                                            Title:  Chief Executive Officer



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