Severe liver disease. If you don’t respond well to Levitra, ask your physician about other PDE5 inhibitor medications you can try. Communicate openly and honestly about your condition. Sildenafil Viagra has a half-life of 4 hours and vardenafil Levitra has a half-life of hours while tadalafil Cialis has a half-life of An inherited eye disease that affects the retina. Here are some steps you can take: Don’t assume you have a long-term problem.You’ve likely heard of Viagra, Cialis, vardenafil (previously sold as Staxyn and Levitra), and Stendra. These are commonly prescribed treatments for erectile dysfunction (ED) — when a person has regular difficulties getting or maintaining enough of an erection for satisfying sexual intercourse. Levitra (Vardenafil Hydrochloride) is an oral medication to treat erectile dysfunction (ED, or impotence) in men. It is the second oral product approved for this condition. It is manufactured by Bayer and GlaxoSmithKline. Levitra works along with sexual stimulation to help achieve an erection. It acts by relaxing muscles in the penis and blood. The most popular erectile dysfunction pills are Viagra, Levitra, Cialis, and Stendra. These medications are classified as phosphodiesterase-5 (PDE5) inhibitors. Erectile dysfunction medications help improve erectile function by increasing levels of nitric oxide, a chemical that relaxes the smooth muscles in the blood vessels. This in turn.