Bristol-Myers Squibb initiates a voluntary recall of 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 included in this recall: 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. The recall is a precautionary measure based upon the company’s determination that some of the tablets, over time, may not meet specification for isopropanol, a compound that helps maintain the drug's active ingredient.