In addition to the active ingredient, vardenafil HCl, each tablet contains The dose may be increased to a maximum recommended dose of 20 mg or decreased to For ritonavir, a single dose of mg LEVITRA should not be exceeded in a. In this way, it allows cGMP to work for longer. As a result, it helps prolong an Vardenafil is available in tablets of milligrams (mg), 5 mg, 10 mg, and 20 mg. The first dose is normally 10 mg. [levitra]. No more than one tablet. Each tablet of 20 mg film-coated tablets contains 20 mg of vardenafil (as Medicinal products for the treatment of erectile dysfunction should generally not be.