<SEC-DOCUMENT>0000312069-06-001802-index.html : 20060210
<SEC-HEADER>0000312069-06-001802.hdr.sgml : 20060210
<ACCEPTANCE-DATETIME>20060209190905
ACCESSION NUMBER:		0000312069-06-001802
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20060210
DATE AS OF CHANGE:		20060209

SUBJECT COMPANY:	

	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
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-31146
		FILM NUMBER:		06594890

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BARCLAYS PLC
		CENTRAL INDEX KEY:			0000312069
		STANDARD INDUSTRIAL CLASSIFICATION:	COMMERCIAL BANKS, NEC [6029]
		IRS NUMBER:				000000000
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		1 CHURCHILL PLACE
		CITY:			LONDON
		STATE:			X0
		ZIP:			E14 5HP
		BUSINESS PHONE:		01100442076993139

	MAIL ADDRESS:	
		STREET 1:		1 CHURCHILL PLACE
		CITY:			LONDON
		STATE:			X0
		ZIP:			E14 5HP

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BARCLAYS BANK PLC
		DATE OF NAME CHANGE:	19850313

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BARCLAYS BANK LTD
		DATE OF NAME CHANGE:	19820607
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>merckcoinc123105.txt
<TEXT>
Document 1 - file: merckcoinc123105.txt

</DOCUMENT>
</SEC-DOCUMENT>