The U.S. Food and Drug Administration is warning consumers who filled prescriptions at The Medicine Shoppe pharmacies located at 8035A Liberty Road and 5900 Reisterstown Road in Baltimore that they may have received drugs that were either expired or suspected counterfeit. The FDA is particularly concerned because a number of the drugs are for serious diseases and could have an adverse effect on treatment. The products in question include: Lisinopril (20 milligrams), Guaifenesin/Dextromethorphan (600 mg and 1000 mg), Gabapentin (100 mg, 300 mg and 400 mg), Metoprolol (50 mg), Nifedipine (30 mg), Diclofenac Sodium (30 mg), Glucophage (500 mg Extended Release), Glucovance (125 mg and 500 mg), Glipizide/Metformin (2.50 mg/250 mg), Furosemide (20 mg), Tamoxifen Citrate (10 mg), Metformin HCl ER (500 mg), and Calcitrol (0.25 micrograms). The FDA has no evidence that any other Medicine Shoppe pharmacies outside of the 8035A Liberty Road and 5900 Reisterstown Road facilities are involved. Because the safety and efficacy of the listed drugs has not been established, the FDA has strongly advised consumers who filled prescriptions for these drugs at these two pharmacies to contact their prescribing physician immediately for new prescriptions. Additionally, consumers in possession of the above listed prescription drugs from these pharmacies should call the FDA at 800-521-5783 for further information on how to dispose of the drugs.