mL = milliliter. For TYLENOL ® Infant's and Children's, repeat dose every 4 hours while symptoms last.. For TYLENOL ® Regular Strength Tablets, repeat dose every 4-6 hours while symptoms last.. Do NOT give more than 5 doses in 24 hours.. Use only the dosing device (syringe or dosing cup) that came with the product. Parents and caregivers should ask a healthcare …