It serves as a precursor for nitric oxide NO , a molecule that helps relax and dilate blood vessels, facilitating increased blood flow to the penis and supporting erections. Horny goat weed epimedium Substances in the leaves of this herb have been used to improve sexual performance, but the herb has not been studied in people. Additionally, physical activity releases endorphins, boosting your mood and reducing stress, contributing to a more satisfying sexual experience. Addressing psychological factors such as stress and anxiety can improve sexual function. Side effects may include nausea, cramps and diarrhea.Here is a quick overview of where you can buy the best Viagra Alternatives: BlueChew – Best Chewable Alternatives to Viagra Hims – Best Viagra Alternatives Overall. Stocksy/Sophia Hsin We include products we think are useful for our readers. If you buy through links on this page, we may earn a small commission. Here’s our process. How . Studies have shown that propionyl-L-carnitine combined with Viagra might improve erectile function better than sildenafil alone. Propionyl-L-carnitine is likely to be safe .