DEXTROMETHORPHAN (DM) DOSAGE (COUGH SUPPRESSANT)

Child's weight more than (pounds)

16

32

48

64

80

96

130

lbs

Total amount (mg)

2.5

5

7.5

10

12.5

15

20

mg

Liquid 5 mg/5 ml (tsp)

1/2

1

1 1/2

2

2 1/2

3

--

tsp

Liquid 7.5 mg/5 ml (tsp)

--

--

1

1

1 1/2

2

3

tsp

Liquid 10 mg/5 ml (tsp)

--

--

--

1

1

1 1/2

2

tsp

  • Dextromethorphan (DM) dosage: Determine by finding your child's weight in the top row of the dosage table. DM is present in most cough syrups.
  • Adult dose: 20 mg
  • Repeat every 6-8 hours as needed
  • Don't use under 1 year of age. Reason: Cough is a protective reflex.

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.

Pediatric HouseCalls Online. Copyright © 2000-2004 Barton Schmitt, M.D. FAAP

Reviewed 8/2004

Revised 7/2002

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