A member asked:

Long term side effects of phenergan (promethazine)?

A doctor has provided 1 answer

Seizures, rare.: Rare side effects include seizures, and neuroleptic malignant syndrome, a life-threatening neurological disorder. This consists of muscle rigidity, fever, autonomic instability, and cognitive changes such as delirium, and is associated with elevated plasma creatine phosphokinase.

Answered 7/12/2020

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