Filagra gel is used to treat ED in men. The lifeblood to the corpus cavernous of the penis increases during sexual arousal due to vasodilation of its veins. It is interrupted by blood-borne chemicals such as nitric oxide and cGMP. The catalyst phosphodiesterase inhibitors type 5 (PDE5) quickly separates CGMP. By inhibiting PDE5, sildenafil citrate ensures that cGMP remains in the circulation for a longer period of time and that vasodilation is maintained. These attainable aims postpone erection and allow for pleasurable sex.