What clinical studies have been done?
ViagraŽ was administered to more than 3000 patients (age 19-87 years) with (ED) of various etiologies (organic, psychogenic or mixed) with a mean duration of 5 years. ViagraŽ demonstrated statistically significant improvement as compared to a placebo in all studies. In one particular study concerning the frequency of successful penetration during sexual activity and maintaining erection after penetration, 83% of these patients reported an improved erection on ViagraŽ verses 12% on a placebo medication.
How much time must surpass before Viagra® is effective?
Viagra is rapidly absorbed. Maximum observed plasma concentrations are reached within 30 to 120 minutes (median time 60 minutes) of oral dosing on an empty stomach. Note: when Viagra® is taken with a high fat content meal, the rate of effectiveness can be significantly diminished.
What happens if there is no sexual stimulation following the ingestion of Viagra®?
Viagra® is naturally eliminated from your body in a few hours.