
Promethazine oral can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.

PREGNANCY: There are no adequate studies of promethazine in pregnant women. Administration of promethazine within 2 weeks of delivery may affect platelet function in the newborn.

DRUG INTERACTIONS: Promethazine should not be taken with any of the MAO (mono-amine oxidase) inhibitor-class of antidepressants, for example, isocarboxazid (Marplan), phenelzine (Nardil), tranylcypromine (Parnate), and procarbazine (Matulane), because of the increased risk of extrapyramidal symptoms (EPS)--uncontrollable movement disorders.

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