Common side effects may include headache, flushing, indigestion, dizziness, and nasal congestion. Serious side effects such as sudden vision loss or prolonged erections (priapism) are rare but require immediate medical attention.Vardenafil has a relatively rapid onset of action, typically within 30 minutes to an hour after consumption. Its effects can last up to 4-5 hours, allowing for a window of opportunity for sexual activity.

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