Cenforce 100 mg contains sildenafil, a medicine used to treat erectile dysfunction (ED). Before taking it, make sure a healthcare professional has confirmed that sildenafil is appropriate for you, particularly if you have heart or blood-pressure problems or take other medicines. The usual maximum recommended sildenafil dose is 100 mg once a day, and it should not be combined with nitrate medicines or recreational “poppers” because this can cause a dangerous drop in blood pressure. Common side effects include headache, flushing, indigestion, nasal congestion, dizziness, and temporary visual changes. Seek urgent medical attention if you experience chest pain, severe allergic symptoms, sudden vision or hearing loss, or an erection lasting more than four hours.