<ARTICLE>                     5
<CIK>   0000849043
<NAME>  NEUROGEN CORPORATION
<MULTIPLIER>                                   1,000


                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                              DEC-31-1999
<PERIOD-START>                                 JAN-01-1999
<PERIOD-END>                                   JUN-30-1999
<CASH>                                         47,287
<SECURITIES>                                   24,225
<RECEIVABLES>                                  0
<ALLOWANCES>                                   0
<INVENTORY>                                    0
<CURRENT-ASSETS>                               72,604
<PP&E>                                         32,361
<DEPRECIATION>                                 8,517
<TOTAL-ASSETS>                                 96,936
<CURRENT-LIABILITIES>                          5,177
<BONDS>                                        0
<PREFERRED-MANDATORY>                          0
<PREFERRED>                                    0
<COMMON>                                       368
<OTHER-SE>                                     (187)
<TOTAL-LIABILITY-AND-EQUITY>                   96,936
<SALES>                                        0
<TOTAL-REVENUES>                               4,980
<CGS>                                          0
<TOTAL-COSTS>                                  13,899
<OTHER-EXPENSES>                               (1,798)
<LOSS-PROVISION>                               0
<INTEREST-EXPENSE>                             2
<INCOME-PRETAX>                                (7,121)
<INCOME-TAX>                                   0
<INCOME-CONTINUING>                            (7,121)
<DISCONTINUED>                                 0
<EXTRAORDINARY>                                0
<CHANGES>                                      0
<NET-INCOME>                                   (7,121)
<EPS-BASIC>                                  (0.49)
<EPS-DILUTED>                                  (0.49)