EXHIBIT 11 American Home Products Corporation and Subsidiaries Computation of Per Share Earnings (In thousands except per share amounts) Year Ended December 31, 1996 1.Net Income ................................. $1,883,403 2.Reported earnings per share: a. Average number of shares outstanding during the year ............................ 634,834 b. Shares issuable upon the conversion of preferred stock ............................ 592 c. Shares for reported earnings per share calculation (2a+2b) ........................ 635,426 d. Reported earnings per share (1/2c) ... $2.96 3.Primary earnings per share: a. Average number of share outstanding during the year ............................ 634,834 b. Shares issuable upon the conversion of preferred stock ............................ 592 c. Shares deemed outstanding from the assumed execise of stock options reduced by the number of shares purchased with the proceeds (determined using average market price during the year)...................... 11,198 d. Deferred contingent common stock awards 457 e. Shares for primary earnings per share calculation (+3b+3c+3d).................... 647,081 f. Primary earnings per share (1/3e)..... $2.91 4.Fully diluted earnings per share: a. Average number of shares outstanding during the year ........................... 634,834 b. Shares issuable upon the conversion of preferred stock ........................... 592 c. Shares deemed outstanding from the assumed execise of stock options reduced by the number of shares purchased with the proceeds (determined using market price at year-end)............................... 11,924 d. Deferred contingent common stock awards 457 e. Shares for fully diluted earnings per share calculation (4a+4b+4c+4d)........ 647,807 f. Fully diluted earnings per share (1/4e) $2.91