isoniazid and Allopurinol Interactions

Interactions between isoniazid and Allopurinol (allopurinol)

allopurinol and isoniazid (Moderate Drug-Drug)

MONITOR: The risk of peripheral neuropathy may be increased during concurrent use of two or more agents that are associated with this adverse effect. In some cases, the neuropathy may progress or become irreversible despite discontinuation of the medications.

MANAGEMENT: Caution is advised during concomitant use of agents with neurotoxic effects. Patients should be monitored closely for symptoms of neuropathy such as burning, tingling, pain, or numbness in the hands and feet. Since the development of peripheral neuropathy may be dose-related for many drugs, the recommended dosages should generally not be exceeded. Consideration should be given to dosage reductions or immediate discontinuation of these medications in patients who develop peripheral neuropathy to limit further damage. If necessary, therapy should generally be reinstituted only after resolution of neuropathy symptoms or return of symptoms to baseline status. In some cases, reduced dosages may be required.