Doctors have warned against “herbal remedies" for Impotence treatment sold over-the-counter in Hong Kong after most of them were found to include untested variants of well-known anti-impotence drugs.
These variants are copies of controlled drugs but they are slightly modified in their chemical formation to get away with patent and other drug-related laws.

Cranked out unlawfully, these chemicals are not tested for their effectiveness or safety and can have impulsive, adverse effects. They are added implicit into "health products," which do not come under stringent tests in most countries.Writing in the latest issue of the Hong Kong Medical Journal, the scientists said they studied 26 anti-impotence products sold in convenience stores and pharmacies.
Although their packaging declared that they limited only "herbal ingredients," variants of sildenafil and vardenafil were found in 14 of them. Sildenafil was found in one product.Sildenafil and vardenafil are generic names for their better known trade labels Viagra and Levitra, respectively, and they are prescribed drugs in Hong Kong.
"Without going through the rigorous drug testing procedure, the bad effects of these chemicals remain largely unidentified and irregular," they warned, as they called for urgent and more effective observation and control.” The medical profession and the public should be alerted to this under-recognized threat."
"Unlike the parent pharmaceutical, no formal studies have been performed to assure the safety and efficacy of these analogues," the researchers wrote.” Evidently, the adverse effects of drug analogues are highly irregular and the utilization of such products is dangerous."
Analogues have also been found in so called "natural" or "herbal" slimming products in Hong Kong and at least one woman has died of a cardiac arrest after consuming them.
Source: Reuters
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