Buy Fildena Online containing sildenafil, treats erectile dysfunction (ED) by increasing blood flow to the penis. It is a phosphodiesterase type 5 (PDE5) inhibitor that works by blocking the enzyme PDE5, which normally breaks down cyclic guanosine monophosphate (cGMP). By inhibiting PDE5, Fildena allows cGMP to accumulate, leading to relaxation of smooth muscles and dilation of blood vessels in the penis. This enhanced blood flow facilitates an erection when sexually stimulated. Fildena is typically taken about an hour before sexual activity, with effects lasting up to 4-5 hours. It is important to use as directed and consult a healthcare provider for personalized advice.