[url =https://www.medicscales.com/cenforce-100mg/]Cenforce 100 USA[/url] is a brand of medication that contains sildenafil citrate as its active ingredient. Sildenafil citrate is commonly used to treat erectile dysfunction (ED), a condition in which a man has difficulty achieving or maintaining an erection sufficient for sexual activity. It belongs to a class of drugs known as phosphodiesterase type 5 (PDE5) inhibitors.

When a man is sexually aroused, the body releases nitric oxide, which helps relax the blood vessels in the penis. This allows for increased blood flow to the penis, leading to an erection. In cases of ED, there may be insufficient blood flow to the penis due to the action of an enzyme called PDE5, which breaks down cyclic guanosine monophosphate (cGMP), a chemical responsible for relaxing the blood vessels.