What is Cialis (Tadalafil)? Cialis is the brand name of the drug Tadalafil. It is mainly used to treat erectile dysfunction (ED), pulmonary arterial hypertension (PAH), and benign prostate hyperplasia (BPH). Some bodybuilders also use Cialis (off-label) to improve blood flow, strength, and muscle growth. It works by blocking an enzyme called phosphodiesterase, which relaxes […]
