Buy Levitra Online, containing the active ingredient Vardenafil, is a medication used to treat erectile dysfunction (ED) in men. It works by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which regulates blood flow in the penis. By blocking PDE5, Levitra enhances the effects of nitric oxide, a natural chemical released during sexual arousal. This leads to the relaxation of smooth muscles and increased blood flow to the penis, helping to achieve and maintain an erection. Levitra is typically taken about 30 to 60 minutes before sexual activity and can be effective for up to 4-5 hours.