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Hepatic microsomal enzyme inducing substances

Authoring team

Drugs which induce hepatic enzymes may have the following effects:

  • they may decrease the bioavailability of other drugs which are metabolised by those enzymes
  • they may increase the bioavailability of drugs which require metabolism for their activation

Examples include:

  • long term alcohol abuse
  • rifampicin
  • anticonvulsants, particularly phenytoin, carbamazepine, phenobarbitone and primidone
  • spironolactone
  • griseofulvin

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The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

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