Neuroleptic malignant syndrome.

Neuroleptic malignant syndrome is an uncommon, occasionally lethal reaction to drug therapy. Patients taking neuroleptic medication are usually the victims of this complex disorder, but others, such as patients with Parkinson's disease, are also at risk. The classic presentation includes autonomic instability, rigidity, hyperthermia, confusion and other neurologic symptoms. Family physicians may be the first to see these patients and must be able to make the diagnosis quickly to avoid delay in treatment.