Fildena is used for who guys have experience trouble in getting an erection or maintain an erection, and erectile dysfunction is a more endless condition caused by a few components. Viagra usually starts working 30–60 minutes after you take it in oral tablet form. It may take up to two hours to work. Viagra doesn't work on its own. You'll still need to feel sexually aroused to get an erection. Feeling relaxed and comfortable can also help Viagra take effect sooner.