Dextromethorphan Dosage Table

Dextromethorphan Dosage Table
Child's weight (pounds) 16-31 32-47 48-63 64-79 80-95 96-129 130+ lbs
Liquid 5 mg/5 ml (tsp) ½ 1 1½ 2 2½ 3 -- tsp
Liquid 7.5 mg/5 ml (tsp) -- -- 1 1 1½ 2 3 tsp
Liquid 10 mg/5 ml (tsp) -- -- -- 1 1 1½ 2 tsp

Indication: Cough suppressant. Dextromethorphan (DM) is present in most cough syrups.

Table Notes:

  • AGE LIMIT: Don't use under 4 years of age. Over 4 years of age: NOT recommended as primary treatment of cough. Use honey instead. Avoid multi-ingredient products in children under 6 years of age. (Reason: FDA recommendations 10/2008).
  • DOSAGE: Determine by finding child's weight in the top row of the dosage table.
  • ADULT DOSE: 20 mg
  • FREQUENCY: Repeat every 6-8 hours as needed

Author and Senior Reviewer: Barton D. Schmitt, M.D.

Content Set: Pediatric HouseCalls Symptom Checker

Pediatric HouseCalls Symptom Checker

Disclaimer: This information is not intended be a substitute for professional medical advice. It is provided for educational purposes only. You assume full responsibility for how you choose to use this information.

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