Okiemom: Are you talking about "Loritabs" which are a synthetic form of codene? If so, I had odd side effects from that (from the Loritabs), I didn't shake or get the chills but I was cold all the time and I could hardly breath--turns out I was allergic to them. Read your medicine brochure and see what the symptoms are of a mild allergic reaction. If so, just quit taking them and ask for Darvocet. They have an inexpensive generic form of that, that is what my dentists had to use on me, for when I had a root canal done. Dental issues stink so I feel for you!!!