X0202 4/A 2005-08-10 2005-08-12 0 0001018952 KOS PHARMACEUTICALS INC KOSP 0001069006 NOVITCH MARK M D KOS PHARMACEUTICALS 2200 N. COMMERCE PKWY., SUITE 300 WESTON FL 33326-3258 1 0 0 0 Common Stock, $.01 par value 2005-08-10 4 M 0 5000 24.69 A 7000 D Common Stock, $.01 par value 2005-08-10 4 S 0 5000 72.37 D 2000 D Common Stock, $.01 par value 2005-08-10 4 M 0 5000 11.16 A 7000 D Common Stock, $.01 par value 2005-08-10 4 S 0 5000 72.37 D 2000 D The reporting person's original Form 4 incorrectly omitted 2,000 shares of the Issuer's Common Stock beneficially owned by the reporting person at the time of the reported transaction. Juan F. Rodriguez, Attorney-in-Fact 2006-05-02