Cialis Precautions Do not take Cialis if you take any medicines called “nitrates” or if you use recreational drugs called "poppers like amyl nitrate and butyl nitrate. Do not take Cialis if you take medicines called “alpha blockers”. Also do not take Cialis if you have been told by your healthcare provider to not have sexual activity because of health problems or if you are allergic to Cialis or any of its ingredients.Tell your health care provider if you have any heart problems such as angina, heart failure, irregular heartbeats, or have had a heart attack, stroke or an erection that lasted more than 4 hours.Tell your healthcare providers that you take Cialis. If you need emergency medical care for a heart problem, it will be important for your healthcare provider to know when you last took Cialis.

Cialis is a prescription medicine taken by mouth for the treatment of erectile dysfunction (ED) in men. Cialis is only for men with ED. Cialis is not for women or children. Erectile dysfunction (ED) is a condition where the penis does not harden and expand when a man is sexually excited, or when he cannot keep an erection. Cialis may help a man with ED get and keep an erection when he is sexually excited. Cialis does not cure ED or increase a man’s sexual desire.