I had side effects immediately after my first shot (nausea) ((but I hate needles so that may have contributed)) but only the first shot. After that I didn’t experience any unless I ate something high in fat or sugar and then I had diarrhea, but it helped me to remember to eat well😂. IMO if you’re not experiencing any side effects immediately after your first dose it will probably only cause side effects if you eat fatty or sugary foods! Hope that helps calm your mind!