Vidalista 80 mg, containing tadalafil, is generally well-tolerated, but like any medication, it can cause side effects in some men. Common side effects include headache, dizziness, flushing (redness of the face), back or muscle pain, indigestion, and nasal congestion. Less common but more serious side effects may include vision or hearing changes, chest pain, and prolonged or painful erections (priapism). If any severe or unusual symptoms occur, it is important to seek medical attention immediately. Always use Vidalista 80 mg under the guidance of a healthcare professional.