For a 2-month-old infant, Tylenol (acetaminophen) should generally not be given without explicit guidance from a pediatrician. Most sources advise against using acetaminophen in infants under 12 weeks (about 3 months) of age unless directed by a healthcare provider due to safety concerns and the need to evaluate the cause of fever or pain first

. If a doctor does recommend acetaminophen for a 2-month-old, the dose must be carefully calculated based on the infant's weight, and the pediatrician will provide specific instructions. For infants under 3 months, some dosing charts suggest very small amounts (e.g., 1.25 mL of infant acetaminophen suspension at 160 mg/5 mL concentration), but this is only under medical advice

. Summary:

• Do not give Tylenol to a 2-month-old without consulting a pediatrician first

• If prescribed, dosing is weight-based and typically very small; follow the pediatrician’s exact instructions.
• Never exceed recommended doses or frequency (usually no more than every 4-6 hours, max 4-5 doses per 24 hours)

Always use the dosing device provided with the medication and seek immediate medical advice if unsure.