T.F.
By 103 I would bring him in if you aren't able to get him to take tylenol and keep it down. A luke warm bath is a good way to brng down his body temp. As the water evaporates off of his skin it will bring his core temp down. Don't put him in cool water because he may start to shiver which will raise his body temp. Also, undress him and don't wrap him in blankets, either.