Trusted Prescription Drug Information

• Do not take Cialis if you are taking any of the following medicines:
· a nitrate such as nitroglycerin (Nitrostat, Nitrolingual, Nitro-Dur, Nitro-Bid, Minitran, Deponit, Transderm-Nitro, others), isosorbide dinitrate (Dilatrate-SR, Isordil, Sorbitrate), isosorbide mononitrate (Imdur, ISMO, Monoket), and others;
· nitrates are also found in some recreational drugs such as amyl nitrate or nitrite ("poppers"); or
· an alpha blocker (other than tamsulosin (Flomax) 0.4 mg once a day) such as doxazosin (Cardura), guanadrel (Hylorel), prazosin (Minipress), terazosin (Hytrin), alfuzosin (Uroxatral), and others.
• Taking Cialis with any of these medications may cause very low blood pressure, possibly resulting in dizziness, fainting, stroke, or heart attack.
• Contact your doctor or seek emergency medical attention for any erection that lasts longer than 4 hours. A sustained erection can damage the penis.
• Refrain from further sexual activity and notify your doctor it you develop dizziness, nausea, or angina (pain, tightness, discomfort, numbness, or tingling in the chest, arms, neck, or jaw) during sexual activity.
• Cialis is usually taken when needed before sexual activity. The effects of Cialis may last for up to 36 hours or more. Your doctor will determine how often you can take Cialis. Do not take it more often than is directed by your doctor.