Vigora 100 works by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which increases the levels of cyclic guanosine monophosphate (cGMP), leading to the relaxation of the smooth muscles in the blood vessels of the penis. This increase in blood flow helps men with erectile dysfunction achieve and maintain an erection suitable for sexual activity. Vigora 100 generally works for about 4-6 hours, but the time may vary based on individual factors.
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