Your diet can influence how long vardenafil lasts and how long it takes for vardenafil to begin working. Staxyn could be a better option for you if you struggle swallowing tablets or you want to take a tablet as discreetly as possible. Like all medicines, Vardenafil has a particular activity and half-life that determines how long it will last as an ED therapy. Only when required, Levitra should be taken about 60 minutes prior to sexual activity. Taking Viagra one hour before sexual activity is recommended for most people, but you can take it anywhere from 30 minutes to four hours prior. · Description and Brand Names. Drug information provided by: Merative, Micromedex ®. US Brand Name. Levitra. Staxyn. Descriptions. Vardenafil is used to treat men with erectile dysfunction (sexual impotence). It belongs to a group of medicines . With the active ingredient vardenafil, Levitra pills stay active in your system for up to 5 hours, so there’s no need to rush things. Go to. What is Levitra? Generic Levitra: What is Vardenafil? How to take Levitra. Is there a way to make Levitra more effective? .  · Adults up to 65 years—10 mg as a single dose, no more than once per day, approximately 1 hour before sexual activity. Your doctor may adjust your dose if needed. However, the dose is usually not more than 20 mg once per day. Children—Use is not .