Learn about Tadalafil, its uses, dosage, side effects and more on drugs.com. Find helpful information about this medication and how it can be used to treat erectile dysfunction and other conditions. Tadalafil Uses, Dosage, Side Effects - Drugs.com Tadalafil is a medication used to treat erectile dysfunction (ED) and symptoms of benign prostatic hyperplasia (BPH) in men. It belongs to a class of drugs...