happy-couple-love-life-enjoy Viagra effect was estimated during several clinical trials. All the trials confirmed that the medication improved erectile dysfunction significantly.
In double-blind, placebo-controlled studies of men with erectile dysfunction caused by different underlying conditions, the use of Viagra led to sturdy enhancement in erections.
The rigidity and time of erections caused by Viagra were measured by special device called RigiScan. Besides, men wrote down the results produced by the medication in special diaries.
The overall results of Viagra administration compared with placebo were significant improvements in erectile dysfunction in most men. According to the trials Viagra was mostly effective about 60 minutes post dose.
As a rule the erectile response was noted to increase with dose enlargement. Still the larger doses raised the risk of side effect progress.
In most men the effect of Viagra online lasted for about 4 hours.