Zhewitra 40 mg contains vardenafil 40 mg (a PDE-5 inhibitor used for erectile dysfunction). Rare but important hearing-related side effects reported with vardenafil include: Sudden decrease in hearing Sudden hearing loss (often reported in one ear) Ringing in the ears (tinnitus) Dizziness/vertigo associated with hearing changes These events are considered very uncommon, and it is not always possible to prove that vardenafil directly caused them, because other health factors may contribute. Seek urgent medical advice and stop taking further doses until you speak with a doctor if you develop: Sudden muffled hearing or hearing loss New ringing in the ears Hearing changes with dizziness or balance problems If you tell me your age, how often you take Zhewitra 40 mg, and whether you have noticed ringing, blocked ears, or reduced hearing after taking it, I can help you assess the situation.