I'll speak briefly, and then I'll defer to my colleagues who are psychiatrists.
We have written about how the symptoms caused by mefloquine can in some cases be confused with post-traumatic stress disorder. I think that during brief diagnosis, brief encounters, if a clinician is not thoroughly familiar with the many symptoms caused by mefloquine, it may be tempting to assign certain combinations of symptoms caused by the drug to PTSD. But I think, as Dr. Ritchie may be able to elaborate on in more detail, certain symptoms are not associated with post-traumatic stress disorder. For example, dizziness caused by mefloquine is unlikely to be explained by post-traumatic stress disorder. Amnesia, extreme severe dissociation and psychosis are symptoms commonly caused by mefloquine in certain circumstances but are not associated with post-traumatic stress disorder.
In my experience reviewing a number of cases, I feel confident that I can distinguish the symptoms of mefloquine toxicity from other psychiatric disorders, based on my knowledge of psychiatric epidemiology. But I do think more research is necessary, and I think we need to educate psychiatrists about this condition so they can incorporate this into their practice. I'll defer to the others to add more.