Australia's drug regulator has warned consumers against buying a diet pill marketed as a natural product that actually contains a banned prescription substance.
The TGA has tested the pills and found they contain an undeclared prescription substance, sibutramine, though the product label claims they contain only herbal ingredients.
The prescription-only medicine sibutramine was the active ingredient in weight-loss medicine Reductil, which was withdrawn in October 2010 after a study showed an increased risk of major cardiac events.
The TGA said the supply of the capsules was illegal and the place of manufacture had not been approved.
A number of people in Australia have bought the product online, the TGA said in a statement on Monday.
It advised people who have bought the pills to stop taking them immediately and take any remaining pills to a local pharmacy for safe disposal.
The TGA is working with Australian customs to stop future shipments of the pills from entering Australia.