Question: how much tylenol to give 20 lb baby?
Answer: 6 to 11 pounds = 1.25 ml or 40 mg. 12 to 17 pounds = 2.5 ml or 80 mg. 18 to 23 pounds = 3.75 ml or 120mg. 24 to 35 pounds = 5 ml or 160 mg.