How Does Sildenafil Citrate Work?
When a man is sexually aroused, the arteries in the penis relax and widen, allowing more blood to flow into the penis. As the arteries in the penis expand, the veins that normally carry blood away from the penis become compressed, restricting the blood flow out of the penis. With more blood flowing in and less flowing out, the penis enlarges, resulting in an erection. If the nerves or blood vessels associated with this process aren’t working properly, a man may not be able to get an erection. Sildenafil Citrate increases blood flow to the penis, so that when a man is sexually aroused, he can get and keep an erection.
