Because of its capacity to regulate blood issues, the active element sildenafil citrate is regarded as a PDE-5 inhibitor. A person taking sildigra 250mg experiences relaxation in the blood arteries that carry blood throughout their body. By relaxing blood vessels that have been constricted by stress, the medication sildigra 250mg increases blood flow to the penis. During sexual activity, a guy taking malegra could be able to tighten his penis. Men’s penises become sufficiently firm once blood flows to them to allow for satisfying sexual activity.