Exhibit I JOINT FILING AGREEMENT This will confirm the agreement by and among the undersigned that the amendment to Schedule 13G filed with the Securities and Exchange Commission on or about the date hereof with respect to the beneficial ownership by...Joint Filing Agreement • January 30th, 2003 • Questcor Pharmaceuticals Inc • Pharmaceutical preparations
This will confirm the agreement by and among the undersigned that the amendment to Schedule 13G filed with the Securities and Exchange Commission on or about the date hereof with respect to the beneficial ownership by the undersigned of the Common Stock, no par value, of Questcor Pharmaceuticals, Inc., a California corporation, is being filed, and all amendments thereto will be filed, on behalf of each of the persons and entities named below in accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.
