When Side Effects Occur

• Side effects from a rabies shot typically occur within two to three weeks after vaccination. However, side effects can appear up to 45 days after vaccination.
  
  

Immediate Side Effects

• Reactions immediately after your pet receives the vaccine are fairly common. Side effects appearing within hours of vaccination include vomiting, lethargy, fever, loss of consciousness and even death.
  
  

A Change in Behavior

• Dogs have been known to become aggressive, experience separation anxiety and show signs of obsessive compulsive disorder due to the rabies vaccination.
  
  

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.
  
  

Other Side Effects

• Other reported side effects from the rabies vaccination include autoimmune diseases, allergies, skin problems, digestive disorders, eating inappropriate materials, like paper, and fibrocarcinomas, a type of cancer, at the injection site.