Cenforce 25 mg contains sildenafil citrate, primarily used to treat erectile dysfunction (ED). While effective for its purpose, it can cause side effects in some individuals. Common side effects include headaches, dizziness, flushing, indigestion, and nasal congestion. Less frequent but more serious effects may include vision disturbances, priapism (a prolonged and painful erection), hearing loss, or heart-related issues like chest pain or irregular heartbeat. Allergic reactions, such as rash or swelling, may also occur. It's important to consult a healthcare provider before using Cenforce, especially for those with cardiovascular or other medical conditions, to minimize potential risks.