Tazzle 20 mg contains tadalafil, a phosphodiesterase type 5 (PDE5) inhibitor used to treat erectile dysfunction (ED). While generally well-tolerated, some users may experience mild to moderate side effects. The most common side effects include: Headache – A frequent effect due to changes in blood flow. Flushing – Reddening or warmth of the face, neck, or chest. Indigestion or upset stomach – Some users experience mild gastrointestinal discomfort. Nasal congestion – A blocked or stuffy nose may occur temporarily. Back pain or muscle aches – Usually Tazzle 20 mg and may occur 12–24 hours after taking the medication. Dizziness – Sometimes caused by lowered blood pressure. Less common but serious side effects Prolonged or painful erections (priapism) lasting more than 4 hours – medical emergency. Sudden vision or hearing loss – rare but requires immediate attention. Severe chest pain, irregular heartbeat, or fainting – seek urgent medical care. Important: Most side effects are temporary and mild, but anyone experiencing severe reactions should stop the medication and consult a healthcare provider immediately.