EXHIBIT 11 DURA PHARMACEUTICALS, INC. STATEMENTS RE COMPUTATIONS OF NET INCOME PER SHARE IN THOUSANDS, EXCEPT PER SHARE AMOUNTS (UNAUDITED) THREE MONTHS ENDED SIX MONTHS ENDED JUNE 30, JUNE 30, 2000 1999 2000 1999 ---------------------------------------------------------------------------- Net Income per Share - Basic Net Income $ 9,440 $ 7,583 $ 21,898 $ 15,348 ================ ================ ================ ================ Weighted average number of common shares: Common stock 44,389 44,085 44,389 44,092 ================ ================ ================ ================ Net Income per share $ 0.21 $ 0.17 $ 0.49 $ 0.35 ================ ================ ================ ================ NET INCOME PER SHARE - DILUTED Net Income $ 9,440 $ 7,583 $ 21,898 $ 15,348 ================ ================ ================ ================ Weighted average number of common and common equivalent shares assuming issuance of all dilutive contingent shares: Common stock 44,389 44,085 44,389 44,092 Stock options 840 562 1,057 778 Warrants 547 438 556 458 ---------------- ---------------- ---------------- ---------------- Total 45,776 45,085 46,002 45,328 ================ ================ ================ ================ Net Income per share $ 0.21 $ 0.17 $ 0.48 $ 0.34 ================ ================ ================ ================