Edysta 20mg Tablet contains Tadalafil, a long-acting phosphodiesterase type 5 (PDE5) inhibitor used primarily to treat erectile dysfunction (ED) in men. It helps achieve and maintain an erection by improving blood flow to the penis when sexually aroused. Tadalafil is also used in the treatment of benign prostatic hyperplasia (BPH) and pulmonary arterial hypertension (PAH) under a doctor's guidance.