Vilitra 40 is an effective medication for treating ED, offering quick onset of action, a reasonable duration of effectiveness, and a well-tolerated profile when used appropriately under medical guidance. Vardenafil, the active ingredient in Vilitra 40, is generally well-tolerated by most men. Common side effects may include headache, indigestion, flushing, nasal congestion, and dizziness, but these are usually mild and temporary.