Xanogen sometimes causes an upset stomach when taken without food. Otherwise, this herbal supplement produces no negative side effects when used as directed, explains Xanogen.com.
Xanogen is an herbal supplement that men use for penis enlargement and male enhancement. This supplement works by increasing the blood flow into the penis during arousal, causing more powerful and longer-lasting erections, reports the manufacturer. Some other results men experience when taking Xanogen include increased sexual performance, increased libido and enhanced ejaculation control. While exact results vary depending on lifestyle, body type, eating habits and genetic makeup, most men see results within 60 days of taking Xanogen.
Formulated for men 18 years of age and older, Xanogen's best results occur when men take two capsules every day with meals. Men should not take more than four capsules in a 24-hour time period. Xanogen contains pharmaceutical-grade herbs, including epimedium, maca, tribulus terrestris, gamma-aminobutyric acid and muira puama. The supplement also contains catuaba bark, xanthoparmelia scabrosa and cnidium monnier, notes Xanogen's official website.
Because Xanogen is an herbal supplement, men do not need a prescription to obtain it. However, men should speak to a doctor before taking the supplement, because it may interact with other medications and health conditions, advises Xanogen.com.