High Risk Medications Captopril, Enalapril, Fosinopril, Lisinopril, Quinapril, Perindopril, Ramipril & Trandolapril Inhalers Allopurinol Amiodarone Azathioprine Azithromycin Carbimazole Levothyroxine Lithium Methotrexate Mycophenolate Mofetil Sodium Valproate and Valproic Acid Warfarin