Sominex - Promethazine hydrochloride
Sedating antihistamine.
By mouth
• Child 2–4 years: 5 mg twice daily, alternatively 5–15 mg once daily, dose to be taken at night.
• Child 5–9 years: 5–10 mg twice daily, alternatively 10–25 mg once daily, dose to be taken at night.
• Child 10–17 years: 10–20 mg 2–3 times a day, alternatively 25 mg once daily, dose to be taken at night. Increase if necessary to 25 mg twice daily.
• Adult: 10–20 mg, 2–3 times daily.