Fildena works by blocking the action of the PDE5 enzyme, which regulates blood flow in the penis. During sexual arousal, nitric oxide is released, increasing levels of cyclic guanosine monophosphate (cGMP). This compound relaxes the smooth muscles in the blood vessels, allowing increased blood flow. By inhibiting PDE5, Fildena helps maintain higher levels of cGMP, facilitating an erec... https://medicovilla.com/product/fildena-double-200-mg/