Mucinex DM 12Hr Chest Congestion & Cough Medicine for Adults, Cold and Cough Medicine for Excess Mucus Relief, 600 mg Guaifenesin & 30 mg Dextromethorphan HBr, 20 Bi-Layer Tablets is up for auction in Health & Household. The current bid is $5.00, 64% below the $14.00 MSRP, in As Is condition. This auction has ended — similar items appear in live auctions regularly.