My Dog Has a Vaccine Reaction – What Should I Do?

Since vaccination is frequently advised once a year, most pet owners are used to bringing their animals to the veterinarian for “yearly vaccinations.” Many owners don’t give their pets’ internal health much thought because it appears like an ordinary component of regular pet care. Because immunization triggers the body’s immune system, it always causes inflammation.

What are the symptoms of vaccine reactions in dogs?

It can be challenging to witness an adverse reaction to a dog’s vaccinations. However, responsible pet owners should be aware that most reactions are minor, temporary, and ordinarily much less harmful than the ailments the vaccinations aim to avoid.

Knowing the most frequent vaccine responses in dogs and what to do if your pet experiences a reaction will make immunization time less problematic for you and your pet.


Vaccines typically cause lethargy, minor pain, and low-grade fever in dogs. Symptoms include a change in your dog’s behavior, such as a lack of energy. These reactions following vaccination are common in dogs and typically subside after a day or two. If your dog’s reaction lasts more than a few days, it’s time to call the vet.

However, if the injection site is inflamed, a veterinarian may suggest laser therapy for dogs to alleviate swelling and pain.

Cold Like Symptoms & Sneezing

However, the Bordetella bronchiseptica and parainfluenza virus vaccinations are given as drops or sprays in the dog’s nose instead of injections. Intranasal vaccination reactions can mimic the common cold, with signs like a stuffy nose, coughing, and sneezing.

Your dog should feel better in a day or two at the very most after experiencing these symptoms. If your dog’s symptoms persist or worsen after a few days, it’s time to make an appointment with the vet. 

What to do during the vaccine reaction?

If your pet has a reaction beyond mild fatigue or discomfort, you should contact your vet immediately. It’s best to visit the nearest emergency room if it’s after regular business hours. Injections of anti-inflammatory drugs can prevent the inflammatory reaction before it causes severe damage. After vaccinating your pet, familiarize yourself with the emergency contact information.

Vomiting may signal a strong response or vehicle sickness. The vet should be notified if vomiting is seen. In case your dog develops an adverse reaction to a vaccine, having the number of a trusted veterinarian who offers pet vaccination services is crucial. By clicking here, you can schedule an appointment with them.

How can vaccine reactions in dogs be avoided?

Antihistamines and corticosteroids given before vaccinating a dog with an allergy history can lessen the severity of the reaction. These drugs may be given intravenously at the start of the vaccination session or orally 1–2 hours before the shot. 

More vaccines given at once raise the risk of an adverse reaction. Your veterinarian may recommend giving your high-risk dog vaccinations two weeks apart. In addition, a pet wellness plan and a routine dog check up are other vital precautions to take.

The Takeaway

Vaccine-related responses in dogs are relatively uncommon but might be of varying severity. Consult your veterinarian about future vaccines for your dog if they have experienced a vaccine reaction. Your dog’s health and safety should be your top priorities while deciding whether or not to vaccinate it. Get your dog the best care possible by teaming up with a trustworthy veterinarian.