EXHIBIT 11 DURA PHARMACEUTICALS, INC. STATEMENTS RE COMPUTATIONS OF NET INCOME PER SHARE THREE MONTHS ENDED MARCH 31, --------------------------- 1996 1997 ------------ ------------ PRIMARY NET INCOME PER SHARE: (unaudited) Net Income . . . . . . . . . . . . . . . . . . $ 4,056,669 $ 8,786,698 ------------ ------------ ------------ ------------ Weighted Average Number of Common and Common Equivalent Shares: Common stock . . . . . . . . . . . . . . . . 31,376,316 43,351,112 Stock options. . . . . . . . . . . . . . . . 1,932,038 1,174,639 Warrants . . . . . . . . . . . . . . . . . . 2,391,264 2,714,066 ------------ ------------ Total . . . . . . . . . . . . . . . . . . 35,699,618 47,239,817 ------------ ------------ ------------ ------------ Net Income per Share . . . . . . . . . . . . . $ 0.11 $ 0.19 ------------ ------------ ------------ ------------ FULLY DILUTED NET INCOME PER SHARE: Net Income . . . . . . . . . . . . . . . . . . $ 4,056,669 $ 8,786,698 ------------ ------------ ------------ ------------ Weighted Average Number of Common and Common Equivalent Shares Assuming Issuance of All Dilutive Contingent Shares: Common stock . . . . . . . . . . . . . . . . 31,376,316 43,351,112 Stock options. . . . . . . . . . . . . . . . 2,089,796 1,174,028 Warrants . . . . . . . . . . . . . . . . . . 2,459,278 2,713,828 ------------ ------------ Total . . . . . . . . . . . . . . . . . . 35,925,390 47,238,968 ------------ ------------ ------------ ------------ Net Income per Share . . . . . . . . . . . . . $ 0.11 $ 0.19 ------------ ------------ ------------ ------------