Tuesday 16 March 2010

Toxic behavior of herbal medicines under scrutiny

A forensic pathologist from the University of Adelaide has issued a global warning about the potential fatal complications of herbal medicines if administered in large quantities, injected, or combined with prescription drugs.
The highly toxic behavior of herbal medicines, many of which are considered to be safe today, was outlined by a paper by Professor Roger Byard published in the US-based Journal of Forensic Sciences.
In his paper he cites the case of an epileptic patient on prescription medicine who had also ingested a Chinese herbal preparation and lapsed into a coma. Cushing syndrome, a hormonal disorder, has also been linked to the ingestion of steroids and herbal cures mixed together.
Some herbal medicines may also have a variety of effects on standard drugs, according to Professor Byard. St John's Wort can reduce the effects of warfarin and cause intermenstrual bleeding in women taking the oral contraceptive pill.
Gingko and garlic also increase the risk of bleeding with anticoagulants and certain herbal remedies such as Borage Oil and Evening Primrose Oil lower the seizure threshold in epileptics.
Professor Byard says the American Society of Anesthesiologists has recommended its patients discontinue using herbal medicines at least two weeks before surgery because of the risks of herbal and drug interaction, including an increased chance of hemorrhaging.
It was remarked by Professor Byard that individual following a combination of herbal medicines with standard drugs to optimize the effectiveness can face devastating results.

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