X0202 4 2006-01-26 0 0001018952 KOS PHARMACEUTICALS INC KOSP 0001248139 MCGOVERN MARK E 2200 N. COMMERCE PKWY., SUITE 300 WESTON FL 33326-3258 0 1 0 0 EVP, Chief Medical Officer Common Stock, $.01 par value 2006-01-26 4 A 0 9500 0 A 14063 D Stock Option (Right to Buy) 44.86 2006-01-26 4 A 0 19000 0 A 2014-01-25 Common Stock 19000 19000 D The grant of restricted stock and stock options was approved by the Compensation and Stock Option Committee of the Board of Directors of Kos Pharmaceuticals, Inc. on January 26, 2006, subject to shareholder approval of an amendment to the Kos Pharmaceuticals, Inc. 1996 Stock Option Plan. Includes 4,563 shares of Kos common stock acquired by the reporting person under the Kos 401(k) plan and the Kos Employee Stock Purchase Plan in transactions exempt under Section 16 of the Exchange Act. The options are exercisable in the following amounts on the following exercise dates: 4,750 on January 26, 2007 4,750 on January 26, 2008 4,750 on January 26, 2009 4,750 on January 26, 2010 Juan F. Rodriguez, Attorney-in-Fact 2006-01-30