How does Filagra 100mg work?
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Sildenafil citrate, the active ingredient in Filagra 100mg, works by inhibiting the enzyme PDE5. This enzyme is responsible for breaking down a substance called cyclic guanosine monophosphate (cGMP) in the blood vessels of the penis. By inhibiting PDE5, sildenafil allows cGMP levels to increase, leading to improved blood flow to the penis, which results in better and longer-lasting erections.