Your baby should see a doctor at ages 3, four, 5, 6 and eight. Infants’ Tylenol Some medical doctors could recommend giving a teething child who is 6 months or older Infants’ Tylenol. It’s essential to ask the baby’s doctor for the correct dosage before administering the drugs. Tylenol is comparatively secure when taken on the appropriate dosage; nevertheless, ingesting too much of the drug can outcome in critical problems, including liver failure. The FDA warns mothers to keep away from taking certain medicines whereas breastfeeding because of a possible for the medicine to be excreted in human milk and trigger harm to the child.