Agranulocytosis induced by anti-tubercular drugs, Isoniazid (INH) and Rifampicin (R) A rare case report
Background: Tuberculosis is a chronic granulomatous infection that has caused a high morbidity and mortality over decades. Tuberculosis treatment has many side effects due to long duration and compliance problems that might require cessation of treatment. Agranulocytosis is a serious idiosyncratic drug reaction characterized by severe leukopenia and a very rare side effect of anti-tubercular treatment mainly due to first line drugs namely Isoniazid(INH) and Rifampicin(R). The current study presents the case of a patient with Isoniazid and Rifampicin induced agranulocytosis.
Conclusion: Isoniazid and Rifampicin are the first line anti-tubercular drugs. Agranulocytosis is most commonly due to drug toxicity but isoniazid and rifampicin are very rare causes of agranulocytosis. Pulmonologists and physicians must be aware of this complication induced by Rifampicin and Isoniazid . The distinction must be drawn between the small risk of neutropenia that seems on present evidence to be benign and agranulocytosis which is fatal if left untreated and unrecognized. Discontinuation of the offending drug can reverse the neutropenia.
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