Promethazine: side effects, dosage, special precautions, and more
Promethazine is a prescription drug used to treat a variety of conditions, including allergies, motion sickness, nausea, and vomiting. It is also used as a sedative to treat anxiety and to help with sleep. Promethazine is an antihistamine, meaning it blocks the effects of histamine, a chemical produced by the body during an allergic reaction. …
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