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To the Editor.— We describe 3 previously undocumented episodes of severe overdosing with antimalaria drugs reported to the Centers for Disease Control and Prevention.

Report of Cases

Case 1

A 45-year-old woman was admitted to a California hospital on September 15, 1997, with Plasmodium vivax malaria, acquired in Honduras. She was treated with 1250 mg of mefloquine hydrochloride on admission, followed by 1260 mg of primaquine (84 tablets) the next day. In addition, primaquine, 15 mg daily, was given for the next 5 days. On September 16, the patient developed abdominal cramps, nausea, hallucinations, black urine, and jaundice. Liver function tests showed markedly elevated findings (total bilirubin, 127 µmol/L [7.4 mg/dL]; aspartate aminotransferase, 3309 U/L; alanine aminotransferase, 2654 U/L) on September 18. Liver transplantation was considered, but the results of liver function tests had returned to normal by October 15. Overdose of primaquine was not considered to be a cause of her acute liver failure . . . [Full Text of this Article]

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Case 2

Case 3

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