CHLORPHENIRAMINE DOSAGE (ANTIHISTAMINE) Child's weight more than (pounds) 22 33 44 55 66 77 88 lbs Total amount (mg) 1 1 1/2 2 2 1/2 3 3 1/2 4 mg Liquid 2 mg/5 ml (tsp) 1/2 3/4 1 1 1 1/2 1 1/2 2 tsp Tablets 4 mg. -- -- 1/2 1/2 1/2 1 1 tablets Chlorpheniramine dosage: Determine by finding your child's weight in the top row of the dosage table. Adult dose: 4 mg. Repeat every 4-6 hours as needed. 6-12 years: 8 mg long-acting tablet every 12 hours as needed. 12 years and older: 12 mg long-acting tablet every 12 hours as needed. Don't use under 1 year of age. Reason: It's a sedative.

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