Headache, flushing, indigestion, nasal congestion, dizziness, and visual disturbances are among the most commonly reported side effects.Serious Side Effects: While rare, serious side effects may include sudden vision loss, sudden hearing decrease or loss, an erection lasting more than 4 hours (priapism), and chest pain. Seek medical attention if any of these occur. https://www.genericday.com/zenegra-50-mg.html