After any vaccine you may use homeopathic Thuja 30 c (Whole Foods has this or get it online at 1 dose as protection to adjuvants; side effects of vaccines. Crush the tiny pellets inside a clean sheet of paper folded twice then tap the crushed powder into the cat or dogs mouth. Close mouth and allow them to dissolve. If some falls out don’t worry. Enough was dissolved to do the job. No food 1 hour before or after dosing.