General Health A holistic approach to health is important to maximize the effectiveness of Viagra, and it may even help your sexual performance without Viagra use. Because alcohol has an adverse impact on genital blood flow, drinking wine, beer, spirits or other alcoholic beverages can reduce the efficacy of vardenafil and boost the risk of side effects. There is some supporting evidence that vardenafil, the active ingredient in Levitra, may also help. The Levitra half-life when taking a standard 10mg dose is four to five hours. Staxyn is the oro-dispersible version of Levitra and the generic medication Vardenafil, and is called Levitra OD for oro-dispersible in some other countries like the UK. · 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 .