Promethazine DM Dosage

Generic name: tromethorphan hydrobromide and promethazine hydrochloride
Dosage form: oral syrup

The information at Drugs.com is not a substitute for medical advice. ALWAYS consult your doctor or pharmacist.

Promethazine hydrochloride and dextromethorphan hydrobromide syrup is contraindicated for children under 2 years of age (see WARNINGS –Black Box Warning and Use In Pediatric Patients).

The average effective dose is given in the following table:

 
Adults
 

1 teaspoonful (5 mL) every 4 to 6 hours,
not to exceed 30 mL in 24 hours.
 
Children 6 Years To Under 12 Years
 

½ to 1 teaspoonful (2.5 to 5 mL) every 4 to 6 hours,
not to exceed 20 mL in 24 hours.
 
Children 2 Years To Under 6 Years
 

¼ to ½ teaspoonful (1.25 to 2.5 mL) every 4 to 6 hours,
not to exceed 10 mL in 24 hours.

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