<SEC-DOCUMENT>0000950123-08-016689-index.html : 20081201
<SEC-HEADER>0000950123-08-016689.hdr.sgml : 20081201
<ACCEPTANCE-DATETIME>20081201161216
ACCESSION NUMBER:		0000950123-08-016689
CONFORMED SUBMISSION TYPE:	25
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20081201
DATE AS OF CHANGE:		20081201
EFFECTIVENESS DATE:		20081201

FILER:

	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:		25
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-03305
		FILM NUMBER:		081222438

	BUSINESS ADDRESS:	
		STREET 1:		ONE MERCK DR
		STREET 2:		P O BOX 100
		CITY:			WHITEHOUSE STATION
		STATE:			NJ
		ZIP:			08889-0100
		BUSINESS PHONE:		9084231688

	MAIL ADDRESS:	
		STREET 1:		ONE MERCK DR
		STREET 2:		PO BOX 100 WS3AB-05
		CITY:			WHITEHOUSE STATION
		STATE:			NJ
		ZIP:			08889-0100
</SEC-HEADER>
<DOCUMENT>
<TYPE>25
<SEQUENCE>1
<FILENAME>y72816e25.htm
<DESCRIPTION>FORM 25
<TEXT>
Document 1 - file: y72816e25.htm

</DOCUMENT>
</SEC-DOCUMENT>