Why is my cat sneezing constantly after a combo vaccine shot?

These types of vaccines are not commonly known to cause signs like you have described as an adverse side effect. The most common vaccine reactions are typically localized effects on the injection sites, decreased energy level / lethargy, less commonly some vomiting, and then much more rarely respiratory distress / anaphylactic shock. It possible that Felix could have had a cold before the vaccine was administered, the vaccine weakened the immune system, and you are now seeing the clinical signs. Conversely, this could be something completely new and unrelated. If it is a simple cold or viral type of infection, it will clear up on its own after a few days. If there is a bacterial or fungal component, medication will be needed.

The sneezing is most likely from being exposed to viruses is the air at the veterinary clinic. This is like kids going to school and getting sick from being around lots of different children. The vaccinations protect against upper respiratory infections but they can still get a mild case. Mr. Kitty should rest and he'll be fine in a few days to a week. Thanks for using Petco Pet Education Center, formerly Petcoach to help you care for Mr. Kitty.

Hello, thank you for your question about Hercules. When vaccines are administered locally, through the nose, they can sometimes cause development of mild clinical signs such as sneezing. However, I would not expect these signs to last for a month after the vaccine. Cats are also prone to development of viral upper respiratory infections, that often occur after a stressful event (like vaccination). It is possible that Hercules has a mild upper respiratory infection. If Hercules is otherwise acting normal and is having no bouts of respiratory distress I would recommend continuing to monitor him. If the signs progress or he becomes lethargic, inappetant, or has increased effort to his breathing I would recommend having him evaluated by your veterinarian as this could be a sign that he has another underlying condition such as asthma or bronchitis, both chronic (not uncommon) conditions in cats. Hope this helps, good luck!

Yes, it is possible he may have contracted feline herpes virus which can stay with him for life and often flares with stressful events. As long as he does not have a fever and is generally well then you may be able to proceed with vaccination which can help to reduce the severity and shedding of the infection

Yes, I would suggest that you have him checked over so you could have some medications for his eyes which otherways might not get better. It could be just a viral infection, cat flu. It could be secondary to the vaccination , a bit like with the human flu vaccination but It depends on which vaccination he had. Hope Salam gets better soon !

Cats can commonly be afflicted by upper respiratory viruses that can cause sneezing, nasal discharge, conjunctivitis and corneal ulcers. These viruses can be latent in a cat's system and then in times of stress or a weakened immune system (like in a kitten) they can cause illness. This is what I suspect is going on with your cat. Oftentimes cats can overcome a viral respiratory infection on their own but sometimes they need antiviral drugs, eye medications, and possibly antibiotics to help them get over the virus. If the illness continues to last more than 3-5 days, of if Mushu stops eating or the sneezing becomes excessive then I would take him back to the vet for a recheck. Most times these cats just need supportive care to get through the illness.

Poor Jax! The two most common reasons are allergies and upper respiratory infection. URI is slightly more common than allergies. Here is a link about URI: https://www.petcoach.co/article/sneezing-and-feline-upper-respiratory-disease/ Lysine for cats can help as can omega 3 fatty acid supplements. Monitor him closely, if you start to see a worsening of the condition or if he is not getting better after a few days, have him examined by the veterinarian. I hope this helps and please feel free to post any additional questions.