The mechanism of action of Filagra is straightforward yet highly effective. When a man is sexually aroused, the body releases nitric oxide, which enhances the production of cyclic guano sine monophosphate (camp). Camp causes the smooth muscles in the penis to relax, allowing blood to flow more freely and resulting in an erection. PDE5 breaks down camp, but Sildenafil, the active ingredient in Filagra, inhibits this enzyme, thereby prolonging the effects of camp and enhancing the ability to achieve and sustain an erection. Filagra typically starts working within 30 to 60 minutes of ingestion, with its effects lasting for up to four to six hours. This timing can vary based on individual metabolism and other factors. Compared to other ED medications, Filagra offers similar benefits but may be preferred by some for its specific formulation and cost-effectiveness.