Mefloquine in "Pfmdr1" copy number. Mefloquine is contraindicated in those with a previous history of seizures or a recent history of psychiatric disorders. Severe side effects requiring hospitalization are rare. Compared to other malaria prophylaxis regimens, mefloqinone may produce more side effects in non-pregnant travelers. In pregnant travelers, it appears to pose minimal risk to the fetus. In 2013 the United States Food and Drug Administration added a boxed warning to the U.S. label of mefloquine regarding the potential for neuropsychiatric side effects that may persist even after discontinuing administration of the drug. Psychiatric effects include nightmares, visual and auditory hallucinations,
Mefloquine of the users reported severe events requiring medical attention, vs 1.2% in the atovaquone-proguanil arm. The brand name drug, Lariam, is manufactured by the Swiss company Hoffmann–La Roche. In August 2009, Roche stopped marketing Lariam in the United States. In June 2010, the first case report appeared of a progressive multifocal leukoencephalopathy being successfully treated with mefloquine. Mefloquine can also act against the JC virus. Administration of mefloquine seemed to eliminate the virus from the patient's body and prevented further neurological deterioration. WRAIR has published several papers outlining ongoing efforts at that institution to make mefloquine safer by producing a