EMA: Second draft public statement on the use of herbal medicinal products containing toxic, unsaturated pyrrolizidine alkaloids (PAs)

It became apparent during assessment of Symphytum officinale (monograph EMEA/HMPC/572844/2009) that the risk assessment of pyrrolizidine alkaloids (PAs) poses considerable difficulties, with several PAs being regarded as both hepatotoxic and carcinogenic. Considering that PAs are natural constituents of a number of plants used for medicinal purposes and that PAs might be part of the food chain, the HMPC decided to prepare a public statement on the use of herbal preparations containing PAs.

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