Since 2007, the FDA has identified more than 25 products marketed with variations of the name Rhino that contained hidden drug ingredients. The FDA has received reports of chest pain, severe headaches, and prolonged erections after taking a Rhino male enhancement product. Some men have been hospitalized due to extreme drops in blood pressure.
The unapproved products are sold at gas stations and convenience stores and on websites such as eBay and Amazon. They have also been found in international mail shipments to the United States. They are marketed under names such as Platinum Rhino 25000, Krazzy Rhino 25000, and Gold Rhino 25000, and are often sold in single-serving package sizes. The FDA said Rhino products contain undeclared ingredients that are the same as or structurally similar to active ingredients in prescription drugs used to treat erectile dysfunction. For example, some contain the phosphodiesterase type-5 inhibitors sildenafil and/or tadalafil. These undeclared ingredients can pose significant health risks, the agency said.
"Over the past few years, the FDA has been combating the retail sale of male enhancement drug products that are frequently misrepresented as dietary supplements and that contain hidden and potentially harmful active drug ingredients," Donald Ashley, J.D., the compliance director in the FDA's Center for Drug Evaluation and Research, said in an agency news release.