Taking generic ED medications is an effective way to save money without sacrificing quality. An erection results from an increase in blood flow to the penis. Taking generic ED medications is an effective way to save money without sacrificing quality. If you become pregnant while taking tadalafil, call your doctor. However, some states require a live video consultation. · Cialis (tadalafil) is a prescription tablet used for erectile dysfunction and benign prostatic hyperplasia. Learn about dosage, side effects, and more. It’s a prescription drug used to treat symptoms of ED and benign prostatic hyperplasia (BPH), or both ED and BPH, in adult males.* Cialis comes as a tablet you swallow. It contains the active. Tadalafil (Cialis) is used to treat erectile dysfunction (ED, impotence; inability to get or keep an erection), and the symptoms of benign prostatic hyperplasia (BPH; an enlarged prostate) which include difficulty urinating (hesitation, dribbling, weak stream, and incomplete bladder emptying), painful urination, and urinary frequency and urgency in adult men.