Nervous Problems The most commonly reported side effect of the rabies vaccine is a sudden occurrence of epilepsy and seizures. Because of the nature of rabies, the vaccine often attacks the nervous system, causing muscle weakness or brain and spinal issues similar to rabies itself.
Immediately or up to 3 days after the shot: Vomiting Facial swelling Fever or lethargy Circulatory shock Loss of consciousness Death
Days, weeks or months after the shot: Fibrosarcoma (cancer) at the injection site Seizures and Epilepsy Allergies Autoimmune diseases, including organ disease, allergies and skin problems Chronic digestive problems Muscle weakness, especially lack of hind end coordination Chronic digestive disorders Skin diseases like Ischemic Dermatopathy / Cutaneous vasculitis Behavior problems: aggression, destructive behaviors, separation anxiety and odd obsessive behaviors (like tail chasing and paw licking).