Recurrence of neuroleptic malignant syndrome via an inadvertent rechallenge in a woman with mental retardation.

A case was described in which neuroleptic malignant syndrome reoccurred as the result of an inadvertent rechallenge in a woman with mild mental retardation. This potentially lethal disorder has an incidence of approximately 1% and a mortality rate of about 15%. Individuals with mental retardation are thought to be at greater risk, and some recommendations were offered to prevent recurrence.