The science behind viagra is quite straightforward. The sexual arousal triggers the release of nitric oxide in the body, which further helps to relax the muscles and also allows more blood to flow into certain tissues. In men with ED, this process is often disrupted. Viagra helps to block an enzyme which is called PDE5, which normally limits the blood flow by inhibiting this enzyme. T... https://www.newcareonlinepharmac.com/blog/where-to-buy-viagra-online-trusted-sources-amp-best-prices