Acetaminophen is the generic name for Tylenol, a pain reliever and fever reducer. It's one of the most widely used pain medications in the world. Children's Tylenol and Children's Motrin both used to claim they were the first choice of pediatricians. They no longer make those advertising claims, but you may wonder whether one is better than the other for your child if he has a fever. I have a perscription for tylenol 3 but have no idea what the breakdown is in mg. I have taken Vicodin or Norco and know that the 5/325 means 5 mg hydrocodone and 325 mg tylenol. MOTRIN ® PM and TYLENOL ® PM are both pain relievers that contain a nighttime sleep aid, but they have different active ingredients. The pain reliever in MOTRIN ® PM is ibuprofen, and its sleep aid is called diphenhydramine citrate. Q) Dr. Gwenn: I have an 11month old son who weighs 20lbs. How much Tylenol or Motrin can I give him? Thanks! AC, Massachusetts. A) Dear AC: Great question. Step 3. Give your child Motrin every six hours. Step 4. Monitor your child’s fever to see if it’s going down. If the fever goes down, you can stop giving the medication. SHOULD I TAKE TYLENOL, ADVIL OR ASPIRIN? by eugeneyeung. When I work as a pharmacist in a retail pharmacy, I get a lot of questions from customers on which painkiller is best for them. You can use motrin for temp over 102 and you can even alternate tylenol inbetween if the fever is still up. So, you could give one every 3-4 hours. Can I give my dog ibuprofen? Can you give a dog Advil®? These questions have a clear answer: No. You. Actually both the responses are correct. These two can be taken together, and Tylenol does not recommend taking them together. You can indeed take both of these medications at the same time, and in fact your doctor may recommend that you do so.