Exhibit 11.1 Neurogen Corporation Computation of Net Earnings Per Common Share (in thousands, except Net Earnings per Common Share amounts) Three Months Three Months Ended Ended March 31, 1997 March 31, 1996 (Unaudited) (Unaudited) ----------- ----------- Weighted average shares of common stock outstanding 14,282 14,020 Dilutive effect of : Warrants 36 43 Stock options 1,048 1,484 ------------- ------------- Common and common equivalent shares 15,366 15,547 ============= ============= Net income $ 2,850 $ 3,610 ============= ============= Earnings per common and common equivalent shares $ 0.19 $ 0.23 ============= =============