<TABLE> <S> <C>


<ARTICLE>                     5
<RESTATED>
<CIK>     0000849043
<NAME>    Neurogen Corporatioon
<MULTIPLIER>                                   1,000

<S>                                               <C>               <C>                  <C>

<PERIOD-TYPE>                                  YEAR              YEAR                YEAR
<FISCAL-YEAR-END>                              DEC-31-1997       DEC-31-1996         DEC-31-1995
<PERIOD-START>                                 JAN-01-1997       JAN-01-1996         JAN-01-1995
<PERIOD-END>                                   DEC-31-1997       DEC-31-1996         DEC-31-1995
<CASH>                                         66,924            62,823              26,005
<SECURITIES>                                   17,227            32,314              39,881
<RECEIVABLES>                                  0                 0                   0
<ALLOWANCES>                                   0                 0                   0
<INVENTORY>                                    0                 0                   0
<CURRENT-ASSETS>                               86,465            96,729              67,403
<PP&E>                                         29,851            19,861              13,372
<DEPRECIATION>                                 4,950             3,136               2,146
<TOTAL-ASSETS>                                 111,869           113,869             104,856
<CURRENT-LIABILITIES>                          4,823             7,291               6,257
<BONDS>                                        0                 0                   0
<PREFERRED-MANDATORY>                          0                 0                   349
<PREFERRED>                                    0                 0                   0
<COMMON>                                       360               356                 0
<OTHER-SE>                                     (3)               (83)                100
<TOTAL-LIABILITY-AND-EQUITY>                   111,869           113,869             104,856
<SALES>                                        0                 0                   0
<TOTAL-REVENUES>                               17,979            18,286              26,929
<CGS>                                          0                 0                   0
<TOTAL-COSTS>                                  23,276            17,229              15,585
<OTHER-EXPENSES>                               (5,040)           0                   (2,285)
<LOSS-PROVISION>                               0                 0                   0
<INTEREST-EXPENSE>                             (35)              51                  69
<INCOME-PRETAX>                                (257)             5,994               13,629
<INCOME-TAX>                                   0                 100                 275
<INCOME-CONTINUING>                            (257)             5,894               13,354
<DISCONTINUED>                                 0                 0                   0
<EXTRAORDINARY>                                0                 0                   0
<CHANGES>                                      0                 0                   0
<NET-INCOME>                                   (257)             5,894               13,354
<EPS-PRIMARY>                                  (.02)             .42                 1.19
<EPS-DILUTED>                                  (.02)             .38                 1.07



</TABLE>