<SEC-DOCUMENT>0000950123-04-000609-index.html : 20040122
<SEC-HEADER>0000950123-04-000609.hdr.sgml : 20040122
<ACCEPTANCE-DATETIME>20040122151347
ACCESSION NUMBER:		0000950123-04-000609
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20040122
GROUP MEMBERS:		MERCK SHARP & DOHME, LTD.

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MERCK & CO INC
		CENTRAL INDEX KEY:			0000064978
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				221109110
		STATE OF INCORPORATION:			NJ
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		ONE MERCK DR
		STREET 2:		P O BOX 100
		CITY:			WHITEHOUSE STATION
		STATE:			NJ
		ZIP:			08889-0100
		BUSINESS PHONE:		9084234044

	MAIL ADDRESS:	
		STREET 1:		ONE MERCK DR
		STREET 2:		PO BOX 100 WS3AB-05
		CITY:			WHITEHOUSE STATION
		STATE:			NJ
		ZIP:			08889-0100

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NEUROGEN CORP
		CENTRAL INDEX KEY:			0000849043
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				222845714
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-41776
		FILM NUMBER:		04537305

	BUSINESS ADDRESS:	
		STREET 1:		35 NORTHEAST INDUSTRIAL RD
		CITY:			BRANFORD
		STATE:			CT
		ZIP:			06405
		BUSINESS PHONE:		2034888201

	MAIL ADDRESS:	
		STREET 1:		35 NORTHEAST INDUSTRIAL RD
		CITY:			BRANFORD
		STATE:			CT
		ZIP:			06405
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>y93419sc13g.txt
<DESCRIPTION>SCHEDULE 13G
<TEXT>
Document 1 - file: y93419sc13g.txt

</DOCUMENT>
</SEC-DOCUMENT>