Viagra clinical research

Categories: Viagra Canada

During a variety of clinical trials, the medication Viagra was studied to assess its pharmacological effect, parameters, side effects and drug interactions.
The clinical trials of Viagra to estimate the effect of the drug to produce and maintain erections in men with erectile dysfunction of different etiology have shown great improvements in erectile abilities of more than 3000 of men.
The action of Viagra in the studies was assessed with different measuring devices, questionnaires and diaries. Most men taking part in clinical trials noted that the medication not only helped to have erections, but kept them after penetration for the time enough for normal sexual intercourse. The average time duration of the drug was 4 hours post dose. The effect of the drug was dose-related, the larger was the dose, and the more significant was the result.
In all studies practically 90% of all patients reported that Viagra improved their erections. A small percentage of participants discontinued the trials due to side effects of the medication.
The different subgroups took part in trials. The results of the trials demonstrated efficacy regardless of severity, etiology of the problem, race and age of a patient.
According to the studies Viagra was effective in the majority of men with ED, including those with a history of coronary artery disease, hypertension, other cardiac disease, peripheral vascular disease, diabetes mellitus, radical prostatectomy, transurethral resection of the prostate (TURP) and spinal cord injury and other patients.

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