Dextromethorphan / Doxylamine Dosage
Medically reviewed by Drugs.com. Last updated on Aug 7, 2025.
Applies to the following strengths: 30 mg-12.5 mg/10 mL; 30 mg-12.5 mg/20 mL; 30 mg-12.5 mg/30 mL; 15 mg-6.25 mg/15 mL; 7.5 mg-3.125 mg/5 mL
Usual Adult Dose for:
Usual Pediatric Dose for:
Additional dosage information:
Usual Adult Dose for Cough and Nasal Congestion
Dextromethorphan-doxylamine 15 mg-6.25 mg/15 mL oral liquid:
30 mL orally every 6 hours not to exceed 4 doses daily.
Dextromethorphan-doxylamine 7.5 mg-3.125 mg/5 mL oral liquid:
20 mL orally every 6 hours not to exceed 4 doses daily.
Usual Pediatric Dose for Cough and Nasal Congestion
Dextromethorphan-doxylamine 15 mg-6.25 mg/15 mL oral liquid:
12 years or older: 30 mL orally every 6 hours not to exceed 4 doses daily.
Dextromethorphan-doxylamine 7.5 mg-3.125 mg/5 mL oral liquid:
12 years or older: 20 mL orally every 6 hours not to exceed 4 doses daily.
Renal Dose Adjustments
Data not available
Liver Dose Adjustments
Data not available
Dialysis
Data not available
More about dextromethorphan / doxylamine
Patient resources
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See also:
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
