OHSU

Dextromethorphan Dosage Table

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

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


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