Neuroleptic malignant syndrome. When levodopa withdrawal is the cause. Neuroleptic malignant syndrome has been described in patients receiving dopamine antagonists and in a few patients after withdrawal of dopaminergic antiparkinson therapy. Complications affect almost all organ systems and can be life-threatening. Most patients have fever, altered level of consciousness, bradykinesia, and rigidity. Treatment includes withdrawal of the causative agent and supportive therapy for complications. When withdrawal of a dopaminergic medication is the suspected cause, the agent should be reinstated. 