Lariam

Mefloquine, sold under the brand name Lariam among others, is a medication used to prevent or treat malaria.[3] When used for prevention it is typically started before potential exposure and continued for several weeks after potential exposure.[3] It can be used to treat mild or moderate malaria but is not recommended for severe malaria.[3] It is taken by mouth.[3] Common side effects include vomiting, diarrhea, headaches, sleep ... [wikipedia]