The concentration of Viagra in the blood peaks 30–120 minutes after taking the medicine, with the 60 minute mark being the most common. During this time, you may begin to feel the effects of Viagra at any point. Viagra pills are commonly available in dosages of 25, 50, or 100 milligrams (mg). According to an older study, the risk of adverse effects does not rise while increasing Viagra dosage from 50 to 100 mg. Taking a bigger dose, on the other hand, will boost the efficacy. The effects of Viagra differ from person to person. The effects of 100 mg of Viagra might persist up to 4 hours after you've taken it. These effects, however, are weaker at 4 hours than at 2 hours after taking Viagra. We have more games to choose from our website.