S.D.
Well, definitely stop giving him the teething tablets! Hyland Teething Tablets actually contain belladonna which is poisonous, albeit in supposedly small enough amounts not to be harmful, but clearly your son might be reacting to it. That said I gave the tablets to my daughter for teething, along with Orajel, frozen washcloths, teething rings, and Tylenol but none of those things worked for her. The only thing that brought her relief was Children's Motrin. I told this to the pediatrician and he said he hears that all the time. Definitely check with your pediatrician for the right dosage. Good luck!