Tadacip 20 mg contains Tadalafil, used for erectile dysfunction. It is usually well tolerated, but it should be discontinued immediately and medical help sought in certain situations. You should stop taking Tadacip 20 mg if you experience: 1. Priapism (medical emergency) Erection lasting more than 4 hours Painful or persistent erection This can cause permanent damage if not treated quickly. 2. Chest pain or heart-related symptoms Chest tightness, irregular heartbeat, or shortness of breath, especially during ***** activity This may indicate a serious cardiovascular issue. 3. Sudden vision or hearing loss Blurred vision, partial/complete loss of vision Sudden decrease or loss of hearing with ringing in ears 4. Severe allergic reactions Swelling of face, lips, tongue Skin rash, itching, or difficulty breathing 5. Severe dizziness or fainting Especially if blood pressure drops significantly Other important guidance Mild side effects like headache, flushing, or indigestion usually do not require stopping immediately, but should be discussed with a doctor if persistent. Do not combine with nitrates or unapproved heart medications.