Exhibit 10.7 WAIVER AND AMENDMENT This Waiver and Amendment, dated as of January 26, 2001 (this "Waiver and Amendment"), waives and amends certain provisions of the Stock and Warrant Purchase Agreement, dated as of May 13, 1997 (the "Stock and Warrant...Waiver And • February 12th, 2001 • Praecis Pharmaceuticals Inc • Pharmaceutical preparations • Delaware
6,250,000 Shares(1) Common Stock ($.01 par value)Praecis Pharmaceuticals Inc • February 12th, 2001 • Pharmaceutical preparations • New York
