Buy Levitra Online containing vardenafil as the active ingredient, typically lasts for about 4 to 5 hours after ingestion. Its onset of action is generally within 30 to 60 minutes, with effects lasting throughout the duration of sexual activity. Factors such as individual metabolism, dosage strength, and presence of food in the stomach can affect how long Cheap Levitra Online lasts. It's essential to follow prescribed dosage guidelines and avoid taking multiple doses within a 24-hour period. If an erection lasts longer than 4 hours (priapism), seek immediate medical attention to prevent potential complications.