Tylenol doses are found on the bottle or your doctor's office staff can help you determine the correct dose. The other troublesome feature of this illness is that the sores in the mouth often make children not want to eat or drink. If this happens, try these ideas. Ambusol or other numbing ointments used for teething can be applied in small doses to the mouth sores using your finger. Offer only cold, bland liquids to drink.
Milk is a good choice.
Sodas with carbonation or citrus juices will sting and your child won't drink them. As for solid food, be prepared for a child who simply won't eat very well for a few days. The foods you offer will need to be bland, soft, not spicy, and not hot in temperature. Warm noodles with a little butter and salt may be tolerated. Try bread or soft rolls.