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Drug interaction

Authoring team

Drug interactions should be thought of particularly carefully when the toxic/therapeutic ratio is low, as with:

  • warfarin
  • phenytoin
  • oral hypoglycaemics
  • oral contraceptives
  • antihypertensives
  • drugs acting on the brain

Mechanisms of drug action include:

  • pharmaceutical
  • pharmacokinetic: - absorption - distribution
    • protein binding
    • tissue binding - elimination - hepatic, renal - pharmacodynamic - direct and indirect

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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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