High Quality Content by WIKIPEDIA articles! Mefloquine hydrochloride (also known as Lariam or Mefaquin) is an orally administered medication used in the prevention and treatment of malaria. Mefloquine was developed in the 1970s at the United States Department of Defense`s Walter Reed Army Institute of Research as a synthetic analogue of quinine. 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. Generic mefloquine from other manufacturers, is still widely available. Rare but serious neuropsychiatric problems have been associated with its use.