Some common manifestations of what we believe is the brain stem dysfunction caused by mefloquine neurotoxicity are such things as central vestibulopathy and central visual disorders: chronic dizziness, chronic vertigo, chronic disequilibrium, visual impairment caused by the neurotoxic effects of this drug. These disorders, these disabilities, are somewhat amenable to rehabilitation. Individuals who are examined by neuro-optometrists and neuro-otologists can sometimes receive therapy that improves their quality of life, reduces the incidents of complications from this disability, but it's never reversed completely; it's simply managed. Their quality of life is improved somewhat, but it's never back to what it was before the neurotoxic injury.
Neurotoxicity, brain damage, cannot be undone.