Viagra online

The characteristics of how the medicine is absorbed metabolized and its time of elimination from the body determine the time of action and the max effect reached at the particular point. Besides, these characteristics help to understand the right dose for particular groups of patients.
Viagra (sildenafil) is fast soaked up in the stomach and enters the blood stream. The bioavailability of the medicine is high. The elimination of the drug happens in the liver. The half-life of the drug is up to 4 hours.
Maximum plasma concentrations distinguished is 30-120 minutes post oral dose.
After oral administration, sildenafil is excreted as metabolites in the feces (80% of oral dose) and in the urine (13% of oral dose).

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