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Active viagra action proceeds till 6 hours.
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At peroral reception viagra is well soaked up. The time of the viagra beginning action is from 40 till 60 minutes from the moment of viagra reception. Active viagra action proceeds till 6 hours. The best viagra results are achieved at reception of a viagra preparation 40-60 minutes prior to intimate contact (for one hour up to meal or hour and a half after).
The additional information on viagra clinical researches is following. Efficiency and safety of viagra was studied in double blind placebo controllable cross research. A viagra preparation applied at 57 patients with infringements erection various derivation (organic, psychogenic, mixed) in the age of from 17 till 80 years.
Viagra research was carried out in Southwest institute of neurological researches of the USA. Viagra efficiency was determined on the basis of a questionnaire concerning sexual function, Doppler - ultrasonic, pulse meter, electro megrim, the control homodynamic factors and an accompanying condition of cardiovascular system.
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