There are all kinds of neurological effects of the drug. We don't have good prevalence data, but we certainly have case reports. As a matter of fact, at our conference a young lady had a seizure, and I ended up calling the ambulance and going to the hospital with her. She was in the Peace Corps, not a veteran. Again, I don't want to give much identifying information, but her seizures had started after exposure to mefloquine.
On May 1st, 2019. See this statement in context.