EXHIBIT 11 DURA PHARMACEUTICALS, INC. STATEMENTS RE COMPUTATIONS OF NET INCOME PER SHARE IN THOUSANDS, EXCEPT PER SHARE AMOUNTS (UNAUDITED) THREE MONTHS ENDED MARCH 31, ---------------------- 1999 1998 NET INCOME PER SHARE - BASIC Net Income...................................... $ 7,766 $ 7,164 -------- -------- Weighted Average Number of Common and Common Equivalent Shares: Common stock................................ 44,100 45,975 -------- -------- Net Income per Share............................ $ 0.18 $ 0.16 -------- -------- -------- -------- NET INCOME PER SHARE - DILUTED Net Income...................................... $ 7,766 $ 7,164 -------- -------- -------- -------- Weighted Average Number of Common and Common Equivalent Shares Assuming Issuance of All Dilutive Contingent Shares: Common stock................................ 44,100 45,975 Stock options............................... 910 833 Warrants.................................... 676 1,715 -------- -------- Total.................................... 45,686 48,523 -------- -------- -------- -------- Net Income per Share............................ $ 0.17 $ 0.15 -------- -------- -------- --------