You don't HAVE to give Tylonel. I rarely give my kids any meds for shots unless they are just miserable afterwards. I distract during the shots by holding their hands, getting right into their face and singing to them while the shots are administered. If he takes a pacifier, use that too. Then, afterward, we just go about our normal day. Maybe put a cool compress on it, and make sure to move the leg around and kind of massage the area (not directly on it, but around the muscle where it might be sore) and just give lots of love that day. Know that you are going to spend that day totally holding, cuddling, etc. your baby and don't worry about giving any other meds.