Adult: As dextromethorphan hydrobromide immediate-release preparation: As liquid-filled cap, caplet, or oral solution: 10-20 mg 4-6 hourly, or 30 mg 6-8 hourly as necessary. Max: 80-120 mg daily. As syr: 20 mg 4 hourly as needed. Max: 120 mg daily. As loz: Suck 1 loz (2.5 mg) as needed. Max: 10 loz daily. As dextromethorphan polistirex extended-release susp (expressed as dextromethorphan hydrobromide equivalent): 60 mg 12 hourly. Dosage recommendations may vary among countries or individual products. Refer to specific product guidelines.
Child: As dextromethorphan hydrobromide immediate-release preparation: As oral solution: 6-<12 years 15 mg 6-8 hourly. As liquid-filled cap, caplet, oral solution: ≥12 years Same as adult dose. As syr: 2-<6 years 5 mg 4 hourly as needed. Max: 30 mg daily; 6-<12 years 10 mg 4 hourly as needed. Max: 60 mg daily; ≥12 years Same as adult dose. As loz: 6-12 years Suck 1 loz (2.5 mg) as needed. Max: ≤2 loz within 4 hours or ≤7 loz daily. Max duration: 5 days; >12 years Same as adult dose. As dextromethorphan polistirex extended-release susp (expressed as dextromethorphan hydrobromide equivalent): 4-<6 years 15 mg 12 hourly; 6-<12 years 30 mg 12 hourly; ≥12 years Same as adult dose. Dosage recommendations may vary among countries or individual products. Refer to specific product guidelines.