What are the risks of taking isoniazid?

The possible risks associated with taking isoniazid include: liver damage that could prove fatal; serious nerve problems; and an allergic reaction to the drug. Other risks include: possible interactions with certain foods or medications, worsening of existing seizure disorders, false urine sugar test results for people with diabetes and vision problems. The risks associated with not taking isoniazid when it is prescribed for TB infection are far worse.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.