Coumadin samples recalled

Some sample packs of Coumadin (warfarin) have been recalled by the manufacturer because the active ingredient may be below or above therapeutic levels.

The voluntary recall by Bristol-Myers Squibb affects three lots of physician sample blister packs of Coumadin 1 mg tablets and five lots of Coumadin 1 mg tablet hospital unit dose (HUD) blister packs. The following lot numbers are being recalled: Physician Sample Blister Packs: Lot# 9A48931A, 9A48931B, 9A48931C, expiration January 2012; HUD Blister Pack: Lot# 8F34006B, 8K44272A, 8K46168A, 9F44437A and 9K58012B with expiry dates between June 2011 and November 2012.

According to a press release from the manufacturer, the recall is a precautionary measure based upon the company's determination that some of the tablets, over time, may not meet specifications for isopropanol, which is used to maintain the active ingredient in a crystalline state.