SIDE EFFECTS INCLUDE POTENTIALLY LONG-TERM MENTAL PROBLEMS:
Suicidal ideation,  depression, hallucinations, anxiety and neurological
side effects such asseizures, ringing in the ears, agitation, restlessness,
mood swings, panic attacks, confusion, hallucinations, aggression,
and psychosis. 
Other neurological symptoms, such as
dizziness and 
headache are relatively common.
People who have, or have had, any mental
health condition 
or seizure disorder
should not take mefloquine.

Mefloquine image f

Notice all the Fs (fluorine)

See also Wikipedia

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