2 doctors weighed in:

Side effects of promethazine hydrochloride?

2 doctors weighed in
Dr. Joseph Woods
Pathology
1 doctor agrees

In brief: 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.

In brief: 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.
Dr. Joseph Woods
Dr. Joseph Woods
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