RPT-BEFORE THE BELL-CVS Caremark down after CEO comments

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NEW YORK, Nov 5 (Reuters) - Shares of CVS Caremark Corp (CVS.N) plunged in premarket trading on Thursday after comments from CEO Tom Ryan on weakness in the pharmacy benefit management business.

CVS shares were down 19.8 percent at $28.90.

Shares of other pharmacy benefit companies fell also.

Medco Health (MHS.N) lost 2.8 percent and Walgreen Co (WAG.N) lost 3.2 percent after the comments.

For details, see ID:[nWEN6174] (Reporting by Angela Moon; Editing by James Dalgleish)