question: My infant son had his two month checkup today. He was given three shots in the leg and was recommended to take infants Tylenol. They did not provide a dose recommendation and he is only 8.14 lbs. I bought infants Tylenol from Walgreens and the box says it s 160 mg per 5ml. The syringe starts at 1.25 /2.5/3.75 up to 5 ml.