Levitra Tablets contain vardenafil, a medicine used to treat erectile dysfunction (ED) in adult men. Levitra works by increasing blood flow to the penis during sexual stimulation, making it easier to achieve and maintain an erection. It belongs to a group of medicines called phosphodiesterase type 5 (PDE5) inhibitors. Taken about 25–60 minutes before sexual activity, Levitra can remain effective for several hours. Sexual stimulation is still required for the medicine to work. Read our expert insight on the differences between ED medication to compare the various treatments on the market.