Seizures associated with quetiapine treatment.
OBJECTIVE
To report a case of seizures in a patient with Alzheimer disease, who was receiving quetiapine for psychoses.


METHODS
A 75-year-old white man with Alzheimer disease was observed to have seizures while receiving quetiapine 500 mg/d and carbamazepine 200 mg/d. He had been taking quetiapine for 18 months prior to the event. No other toxic, metabolic, or anatomic abnormalities were identified to explain the seizures. After cessation of quetiapine treatment, the patient remained seizure free. An objective causality assessment revealed that the adverse drug reaction was possible.


CONCLUSIONS
The patient was taking a relatively high dose of quetiapine. An increased risk of seizures has been associated with Alzheimer disease. Using a relatively high dose of quetiapine may have resulted in seizures in our patient with Alzheimer disease.


CONCLUSIONS
As with other antipsychotics, quetiapine should be used cautiously in elderly patients with conditions that can lower the seizure threshold, and special monitoring should be performed for this serious adverse effect.
Dogu
Okan
O
Department of Neurology, Faculty of Medicine, Mersin University, Mersin, Turkey. okandogu@mersin.edu.tr
Sevim
Serhan
S
Kaleagasi
Hakan S
HS
D000368:Aged; D000544:Alzheimer Disease / Q000150:complications; D014150:Antipsychotic Agents / Q000008:administration & dosage / Q000009:adverse effects*; D002220:Carbamazepine / Q000008:administration & dosage / Q000009:adverse effects; D003987:Dibenzothiazepines / Q000008:administration & dosage / Q000009:adverse effects*; D004305:Dose-Response Relationship, Drug; D004359:Drug Therapy, Combination; D006801:Humans; D008297:Male; D011618:Psychotic Disorders / Q000150:complications / Q000188:drug therapy; D000069348:Quetiapine Fumarate; D012640:Seizures / Q000139:chemically induced*
D014150:Antipsychotic Agents; D003987:Dibenzothiazepines; D000069348:Quetiapine Fumarate; D002220:Carbamazepine