Isoniazid drug and food interactions

Area of Science:

• Pharmacology
• Drug Metabolism
• Clinical Toxicology

Background:

• Isoniazid is a crucial medication for tuberculosis treatment.
• Drug interactions involving isoniazid can lead to adverse events and treatment complications.
• Understanding isoniazid's metabolic pathways is vital for patient safety.

Purpose of the Study:

• To comprehensively review documented and potential drug interactions associated with isoniazid.
• To elucidate the mechanisms underlying isoniazid-induced drug interactions.
• To highlight clinical implications and risks of isoniazid therapy.

Main Methods:

• Systematic review of clinical trials and case reports on isoniazid interactions.
• Analysis of pharmacokinetic and pharmacodynamic data related to isoniazid.
• Evaluation of isoniazid's effect on specific drug-metabolizing enzymes, including CYP2E1.

Main Results:

• Isoniazid increases serum concentrations and toxicity of phenytoin and carbamazepine.
• High doses of isoniazid potentiate the effects of theophylline and warfarin.
• Isoniazid inhibits metabolism of certain benzodiazepines and vitamin D, and affects drug-food interactions.
• Isoniazid exhibits a biphasic effect on CYP2E1, contributing to acetaminophen interactions and hepatotoxicity risk.

Conclusions:

• Isoniazid is a potent inhibitor of drug metabolism, necessitating careful patient monitoring.
• Clinically significant drug-drug and drug-food interactions are well-documented for isoniazid.
• Further research is expected to uncover additional isoniazid-related interactions and their mechanisms.