About dextromethorphan hbr
Cough suppressant (antitussive)
Used for
- Temporarily relieves dry, irritating coughs caused by colds or minor throat irritation.
Usual adult dose
Adults: 10–20 mg every 4 hours, or 30 mg every 6–8 hours; maximum 120 mg daily.
Usual dose in children
Children 6–11 years: 5–10 mg every 4 hours, or 15 mg every 6–8 hours; maximum 60 mg daily. Not for children under 6 unless directed by a clinician.
Common side effects
- Drowsiness or dizziness
- Nausea or stomach upset
- Confusion, especially with excessive doses
Important warnings
- Do not use with an MAO inhibitor or within 14 days of stopping one.
- Avoid combining with other medicines containing dextromethorphan.
- Seek medical assessment for persistent cough, breathing difficulty, or cough with substantial mucus.
- Misuse or overdose can cause severe poisoning, including hallucinations and impaired coordination.
Pregnancy
Safety information is limited; use only when considered necessary by a healthcare professional.
Breastfeeding
Information is limited; ask a healthcare professional before use.
Interactions
- MAO inhibitors can cause dangerous reactions.
- Serotonergic medicines, including some antidepressants, may increase serotonin syndrome risk.
- Alcohol, sedatives, and some antihistamines can worsen drowsiness.
- Some medicines, such as fluoxetine or quinidine, can raise dextromethorphan levels.
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 It may be incomplete or out of date.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.