[Off-label use of acetazolamide in a patient with familial hemiplegic migraine and concomitant psychotic episodes].

A 42-year-old patient with cognitive deficits due to childhood meningitis suffered from recurrent episodes of familial hemiplegic migraine. Additionally, he developed concomitant psychotic episodes requiring subsequent in-patient psychiatric treatment. Following combined neurological and psychiatric treatment he always recovered from the episodes within a few weeks time. Prophylactic treatment of migraine using topiramate and acetazolamide (off-label) prevented attacks for several months. When off-label compensation was refused and, as a consequence, the drug discontinued, hemiplegia relapsed within a few days. Hence, acetazolamide was prescribed again and the family paid for the medication. Since that time, the patient did not show severe attacks for at least 8 months apart from a transient attack induced by acute flu-like illness.