About dextromethorphan hydrobromide
Cough suppressant
Used for
- Temporarily relieves dry, irritating coughs from colds or minor throat irritation.
Usual adult dose
Adults and ages 12+: 10–20 mg every 4 hours, or 30 mg every 6–8 hours; maximum 120 mg daily.
Usual dose in children
Ages 6–11: 5–10 mg every 4 hours, or 15 mg every 6–8 hours; maximum 60 mg daily. Not for under 6 without medical advice.
Common side effects
- Drowsiness or dizziness
- Nausea or stomach upset
- Confusion, especially with excessive doses
Important warnings
- Do not combine with other products containing dextromethorphan.
- Avoid use with monoamine oxidase inhibitors or within 14 days of stopping them.
- Seek medical advice for persistent cough, breathing difficulty, or cough with significant phlegm.
- Misuse can cause serious harm, including hallucinations and seizures.
Pregnancy
Use only after discussing with a healthcare professional; safety evidence is limited.
Breastfeeding
Use only after discussing with a healthcare professional; evidence is limited.
Interactions
- Monoamine oxidase inhibitors: risk of serious reactions.
- Some antidepressants, including SSRIs: may increase serotonin-syndrome risk.
- Quinidine, fluoxetine, and other CYP2D6 inhibitors may raise dextromethorphan levels.
- Alcohol and sedatives may increase drowsiness.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.