Many of them contain potentially dangerous ingredients found in medications such as Viagra, the researchers add,
There is no evidence that over-the-counter sexual enhancement supplements for men are working, some of which are potentially dangerous, a new study suggests.
Many men seeking medical help for sexual health problems report the use of supplements. But with little dose or ingredient regulation, the health effects of these products are unknown, the researchers said in the basic observations.
Many of these products contain traces of a component used in medications such as Viagra, which can be dangerous for men with certain health problems, the researchers added.
The researchers identified the best-selling male sexual auxiliary supplements and analyzed the ingredients, including those of products marketed to promote erection, desire and sexual performance.
“While some of the natural supplements we have reviewed promise to improve mild sexual dysfunction, they lack solid human evidence,” says lead study author Dr. Ryan Terliki, assistant professor of urology at Wake Forest Baptist Medical Center in Winston, Salem, statement from the North Carolina news center.
“In addition, due to the concern that some products are not pure or weak, we do not recommend these products to our patients routinely.”
The researchers found that some of the most commonly used products include horned goat herbs, ginseng, DHEA, Ginkgo biloba, fenugreek and maca.
For many products, the researchers said, there is no scientific evidence to support claims that they can improve libido, erectile dysfunction or sexual performance.
They also discovered that some of the so-called “natural” products had effects of phosphodiesterase 5 (PDE5I) inhibitors, a drug found in prescription drugs, such as Viagra, used to treat impotence.
A study reviewed by researchers found that 81 percent of the analyzed samples of male sexual enhancement products purchased in the United States and Asia contain PDE5I.
Turleki said: “PDE5Is cannot be legally sold without a prescription in this country.” Men who use these medications without a doctor’s supervision run the risk of taking them incorrectly. Patients with advanced heart disease, for example, or taking nitrates, such as nitroglycerin, should not use PDE5I because it can cause an unsafe drop in blood pressure. Similarly, men with severe liver dysfunction or end-stage renal disease who need dialysis should avoid these products. “
The researchers also said that men who take medications such as flomax (tamsulosin), terazosin or doxazosin to treat an enlarged prostate are at risk of getting dizzy and falling if they take PDE5I at the same time.