SIGNIFICANT risks are associated with some traditional herbal products in widespread use in Australia, according to the authors of an article in the latest edition of the Medical Journal of Australia.
The mistaken belief that "natural" means "safe", the lack of regulation and the inclusion of unidentified ingredients, represent just some of the risks, the authors asserted.
The proportion of the Australian population using herbal products was estimated to be 69% in 2005, with research finding over half of those using complementary medicine (CMs) did not inform their doctors, thereby risking interactions with prescribed medications.
"That side effects of herbal medicines used in traditional societies have not been reported is often cited in favour of their safety, but the lack of systematic observation has meant that even serious adverse reactions, such as the kidney failure and liver damage caused by Aristolochia species, were unrecognised until recently," wrote the authors, led by Professor Roger Byard, chair of Pathology at the University of Adelaide.
Among the potential dangers highlighted was the risk of adulteration with unidentified pharmaceutical agents which could create dangerous drug-drug interactions or adverse reactions.
The authors also warned of the substitution of original plant ingredients with less expensive or more accessible ones, and even the presence of toxic substances, as well as inadequate manufacturing or processing practices.
"It may be appropriate for the Therapeutic Goods Administration to require manufacturers to have samples independently tested before placing them on the market.
"Legal action should be considered in cases of non-compliance with applicable regulations, and preparations containing illegal substances should be banned," the authors conclude.
HOWEVER Carl Gibson from Complementary Medicines Australia said the main concern lies in products purchased online from overseas, which are not subject to the same regulations as those enforced in Australia.
He said strict requirements for the manufacture of herbal products, including licensing and inspecting of manufacturers, ensure that products meet the high standard of Good Manufacturing Practice.
From May 2017 the TGA will begin publishing information on the outcomes of laboratory testing on its website, Gibson added.
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