MERCK SHARE OF MEDCO MAIL SERVICE IS ABOUT 21%, FIRM TELLS ANALYSTS; CHOLESTEROL, HYPERTENSION MEDICINES HAVE SHARES ABOUT 24 POINTS ABOVE NATIONAL AVERAGE

Merck has a 21% dollar share of the Medco mail service business, Merck-Medco Managed Care President Per Lofberg told a securities analysts meeting at Merck's Whitehouse Station, N.J. headquarters Dec. 18.