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A 48-year-old member asked:

Side effects of promethazine hydrochloride?

1 doctor answer2 doctors weighed in
Dr. Joseph Woods
Pathology 29 years experience
Seizures.: Common side effects of this antihistamine include, tardive dyskinesia, confusion in the elderly, drowsiness, dizziness, fatigue, vertigo, respiratory depression, constipation, euphoria, and short temper/irritability. Rare side effects include seizures, and neuroleptic malignant syndrome, a life-threatening neurological disorder. Because of capacity for more severe side effects, avoid in elderly.
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Last updated Mar 8, 2019

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