Apr 3, 2019 Infants; Tylenol Oral Suspension (160 mg/5 ml) replaces the older, more concentrated To give your child a safe dose of medicine, you should: 6-11 pounds (0-3 months) - 1.25ml; 12-17 pounds (4-11 months) - 2.5ml; 18-23 Older versions of Tylenol and other brands of acetaminophen often...