POWER OF ATTORNEY




	The undersigned hereby appoints Stephen R. Davis, EVP
and Chief Business Officer of Neurogen Corporation, his or her
attorney-in-fact and agent in any and all capacities to execute
for and on his or her behalf filings with the Securities and
Exchange Commission on Forms 3, 4 or 5 pursuant to Section 16
of the Securities and Exchange Act of 1934, as amended, to the
extent that such filings relate to the undersigned's status as
a director or officer of Neurogen Corporation.  The undersigned
further appoints Stephen R. Davis his or her attorneyin fact
and agent to execute any and all amendments to such filings as
such attorney-in-fact and agent deems appropriate.  The
undersigned hereby grants to such attorney-in-fact and agent
full power and authority to do and perform each and every act
necessary or desirable as the undersigned could do in person,
hereby ratifying and confirming all that such attorney in fact
and agent may lawfully do or has done by virtue hereof.

This Power of Attorney shall become effective as of May 6, 2003.


/s/ JOHN SIMON
_____________________________
John Simon