Tadalafil is available on prescription only. What Is Cialis? What alternatives can I use for erectile dysfunction? Back to Tadalafil About tadalafil – Brand names: Cialis, Adcirca Tadalafil is a medicine used to treat erection problems erectile dysfunction and symptoms of an enlarged prostate benign prostate enlargement. If you take nitrates in any form, or are on treatment for pulmonary hypertension , you should not take tadalafil. Resources and support See the Healthy Male site for more information about erectile dysfunction and its treatment.Tadalafil is in a class of drugs called phosphodiesterase-5 (PDE5) inhibitors and is available in a generic form often called generic Cialis. Tadalafil has been on the . Tadalafil is a medicine used to treat erectile dysfunction (ED, also called impotence) and problems with urination caused by an enlarged prostate (benign prostatic hypertrophy or BPH). It is sometimes known by its generic name tadalafil, and sometimes known by its trade name, Cialis. There are also other brands of this medicine available. GoodRx can help you save over 80% off the average retail price of the generic versions. Generic sildenafil at certain pharmacies is as low as $ with a free GoodRx discount. You can also find generic tadalafil and vardenafil for as low as $ and $ , respectively.