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See the DrugPatentWatch profile for promethazine
Promethazine DM (OTC) (“DM” stands for the added de‑xtromethorphan cough suppressant)
Why the variation? • Pharmacy markup and local competition. • Whether the pharmacy offers “no‑insurance” “price‑match” or “pharmacy discount card” programs. • The specific formulation (e.g., 10 mg of dextromethorphan vs. 2.5 mg of promethazine) can affect cost.
Always read the label for dosing instructions, and if you have any medical questions about using promethazine DM, consult a healthcare professional.
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