Promethazine DM Dosage
Generic name: DEXTROMETHORPHAN HYDROBROMIDE 15mg in 5mL, PROMETHAZINE HYDROCHLORIDE 6.25mg in 5mL
Dosage form: oral solution
Drug class: Upper respiratory combinations
Medically reviewed by Drugs.com. Last updated on Feb 3, 2025.
Promethazine hydrochloride and dextromethorphan hydrobromide oral solution 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. |
More about Promethazine DM (dextromethorphan / promethazine)
- Check interactions
- Compare alternatives
- Pricing & coupons
- Reviews (43)
- Side effects
- During pregnancy
- Drug class: upper respiratory combinations
Patient resources
Professional resources
Related treatment guides
See also:
Triamcinolone nasal
Triamcinolone nasal is used for allergic rhinitis, allergies
Diphenhydramine
Diphenhydramine is an antihistamine used to treat sneezing, runny nose, itching, hives and other ...
Ozempic
Learn about Ozempic (semaglutide) for type 2 diabetes treatment, weight management, cardiovascular ...
Dexamethasone
Dexamethasone is used to treat inflammatory conditions such as allergies, skin conditions ...
Promethazine
Promethazine is a phenothiazine and antihistamine used to treat allergies, motion sickness, nausea ...
Benzonatate
Benzonatate is a non-narcotic cough medicine used to relieve coughing. Includes benzonatate side ...
Loratadine
Loratadine is a non-drowsy antihistamine used to relieve allergy symptoms like sneezing, runny ...
Methylprednisolone
Methylprednisolone is used to treat conditions such as allergies, arthritis, lupus and ulcerative ...
Cetirizine
Cetirizine treats cold or allergy symptoms such as sneezing, itching, watery eyes, or runny nose ...
Montelukast
Montelukast is a daily oral medication used to prevent asthma attacks, exercise-induced ...
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.