Dystal 10mg Tablet contains Tadalafil, which is primarily used to treat erectile dysfunction (ED), benign prostatic hyperplasia (BPH), and pulmonary arterial hypertension (PAH). It works by increasing blood flow to the penis, helping men achieve and maintain an erection for sexual activity. Additionally, it relieves symptoms of BPH, such as urinary frequency and urgency, and improves exercise capacity in patients with PAH.