Exhibit 10.25 AMENDMENT NO. 1 TO RIGHTS AGREEMENT THIS AMENDMENT NO. 1 (this "Amendment"), dated as of December 9, 1999, to the Rights Agreement, dated as of October 22, 1997 (the "Rights Agreement"), between Biosite Diagnostics Incorporated, a...Rights Agreement • March 30th, 2000 • Biosite Diagnostics Inc • In vitro & in vivo diagnostic substances • Delaware
