Carbamazepine-induced hair loss

An 8 1/2-year-old girl was treated with carbamazepine because of headaches and electroencephalogram findings compatible with multifocal epilepsy. Within a week of drug initiation, hair shedding started. This continued until the drug was stopped, when new hair growth resumed. The hair loss was associated with carbamazepine serum concentrations lower than the therapeutic range.