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Nitrates dilate (open up) blood vessels around the heart and are used in conditions such as angina and coronary artery disease. Combining Cialis, or any other pill for erectile dysfunction, with a nitrate could cause a massive and potentially fatal drop in blood pressure. Recreational drugs such as amyl or butyl nitrate may also have this effect when mixed with Cialis. CIALIS, when taken once daily, was shown to be effective in improving erectile function in men with erectile dysfunction (ED). The effects of tadalafil on cardiac function, hemodynamics, and exercise tolerance were investigated in a single clinical pharmacology study. In this blinded crossover trial, 23 subjects with stable coronary artery disease and evidence of exercise-induced cardiac ischemia were enrolled.

Because of insufficient information in patients with severe hepatic impairment, use of CIALIS in this group is not recommended [see Use In Specific Populations] . Evaluation of erectile dysfunction and BPH should include an appropriate medical assessment to identify potential underlying causes, as well as treatment options. Ketoconazole (400 mg daily), a selective and potent inhibitor of CYP3A4,increased tadalafil 20 mg single-dose exposure (AUC) by 312% and Cmax by 22%, relative to the values for tadalafil 20 mg alone. Ketoconazole (200 mg daily) increased tadalafil 10-mg single-dose exposure (AUC) by107% and Cmax by 15%, relative to the values for tadalafil 10 mg alone [see DOSAGE AND ADMINISTRATION] . CIALIS is indicated for the treatment of the signs and symptoms of benign prostatic hyperplasia (BPH). It may also take some trial and error to find the dosage that works best for you.

Common side effects of Cialis include headaches, flushing, or a stuffy or runny nose, reflecting the effects of the drug on the blood vessels of the head and neck. Cialis, like all other PDE5 inhibitors, affects blood vessels and smooth muscle in other parts of the body, not just the penis