Cialis (tadalafil) relaxes muscles and increases blood flow to particular areas of the body.
Cialis is used to treat erectile dysfunction (impotence) and symptoms of benign prostatic hypertrophy (enlarged prostate).
Another brand of tadalafil is Adcirca, which is used to treat pulmonary arterial hypertension. Do not take Cialis while also taking Adcirca, unless your doctor tells you to.
Some medicines can cause unwanted or dangerous effects when used with Cialis. Tell your doctor about all your current medicines, especially riociguat (Adempas).
Do not take Cialis if you are also using a nitrate drug for chest pain or heart problems, including nitroglycerin, isosorbide dinitrate, isosorbide mononitrate, and some recreational drugs such as "poppers". Taking Cialis with a nitrate medicine can cause a sudden and serious decrease in blood pressure.
Slideshow: View Frightful (But Dead Serious) Drug Side Effects
View Frightful (But Dead Serious) Drug Side Effects
Contact your doctor or seek emergency medical attention if your erection is painful or lasts longer than 4 hours. A prolonged erection (priapism) can damage the penis.
Stop using Cialis and get emergency medical help if you have sudden vision loss.
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