Tadalafil tablets are primarily used to treat erectile dysfunction (ED) and symptoms of benign prostatic hyperplasia (BPH) in men. Tadalafil works by relaxing blood vessels, which increases blood flow to specific areas of the body, such as the penis, helping achieve and maintain an erection during sexual activity. It also helps alleviate BPH symptoms like difficulty in urination. Tadalafil is often taken as needed, about 30 minutes before sexual activity, but it can also be prescribed for daily use. The effects can last up to 36 hours. Common side effects include headaches, back pain, and indigestion. Always follow your doctor's instructions when taking Tadalafil tablets and avoid using them with nitrates.