There may be rare occurrences of priapism or painful, prolonged erections. FDA encourages anyone aware of a serious side effect, including consumers or patients, to make a MedWatch report. Tell your healthcare provider that you take Cialis. When will Cialis be available to pharmacies? Because patients with recent heart attacks or stroke, heart pains angina , heart failure, uncontrolled blood pressure or uncontrolled irregular heart beats, severe liver disease, and retinal eye problems were not studied with Cialis, Cialis is not recommended for these patients. For further information contact your pharmacist or Eli Lilly and Company directly. Always discuss with your health care practitioner ALL of the medications you are taking prescription and over-the-counter that way, you can receive the best advice for your own situation.Cialis is available as the generic drug tadalafil. A generic drug is an exact copy of the active drug in a brand-name medication and is considered just as safe and . Tips Response/effectiveness Interactions 1. How it works Cialis is a brand (trade) name for tadalafil which may be used to treat erectile dysfunction (ED) and benign prostatic hyperplasia (BPH). Cialis (tadalafil) works by blocking the action of an enzyme known as cGMP-specific phosphodiesterase type-5 (PDE-5). Cialis is available as the generic drug tadalafil. A generic drug is an exact copy of the active drug in a brand-name medication and is considered just as safe and effective.