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Kane SP. Dexchlorpheniramine; Dextromethorphan; Phenylephrine, ClinCalc DrugStats Database, Version 2025.08. ClinCalc: https://clincalc.com/DrugStats/Drugs/DexchlorpheniramineDextromethorphanPhenylephrine. Updated August 10, 2025. Accessed January 14, 2026.