Viagra’s active ingredient is sildenafil citrate. This medication works by increasing blood flow to the penis, facilitating an erection in response to sexual stimulation. It’s important to remember that Viagra does not create an erection on its own; sexual stimulation is required.
How Sildenafil Works
Sildenafil inhibits a specific enzyme called phosphodiesterase-5 (PDE5). By blocking PDE5, sildenafil allows increased levels of cyclic GMP, a molecule that relaxes the smooth muscles in the blood vessels of the penis. This relaxation leads to vasodilation, increasing blood flow and resulting in an erection.
Understanding Generic Viagra
Generic Viagra contains the same active ingredient, sildenafil citrate, as brand-name Viagra. However, generic versions differ in inactive ingredients and may vary slightly in appearance. The FDA rigorously tests generic drugs to ensure they meet the same quality and effectiveness standards as brand-name medications. Generic versions are often significantly less expensive.
