Fildena, containing sildenafil citrate, works by expanding blood stream to the penis, working with an erection. At the point when a man is physically excited, nitric oxide is delivered in the erectile tissue of the penis, which enacts a compound, guanylate cyclase. This compound expands levels of cyclic guanosine monophosphate (cGMP), loosening up the smooth muscles in the veins of the penis and permitting blood to stream in, bringing about an erection. Fildena 150 restrains the activity of a compound called phosphodiesterase type 5 (PDE-5), which separates cGMP, subsequently dragging out the impacts of expanded blood stream and assisting with keeping an erection.