Why Does My Cat Vomit Excessively?

Find out what the causes could be behind chronic vomiting.

By Arnold Plotnick, DVM

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Cat Throwing Up from Pancreatitis

Q: We have an active, 2-year-old male domestic shorthaired cat.Our problem is that he vomits very often. He vomits about five to 10 minutes after eating and occasionally in the middle of the day. We also notice that he eats fuzz, such as cat fur, carpet fuzz, dust bunnies, thread, etc.

We took him to the vet a few months ago because he was vomiting two to three times a day and completely had stopped eating and drinking. The veterinarian said that the cat had developed jaundice from not eating. He was hospitalized and put on IV fluids for two nights and was sent home on the antibiotic amoxicillin and another medication that I think was another antibiotic.

He did well after coming home, but now the vomiting has recurred. We tried switching his food brand but he just sniffs it and walks away. So we reverted back to what we were feeding him before, but now he won't eat that either.

We think the not-eating has to do with the cat flea medication we give him because we have noticed that these symptoms tend to occur together. How can we encourage him to eat so he will keep his food down and not develop a liver disorder?

A: When cats vomit, it is either a systemic illness, or it is a gastrointestinal disorder. To achieve a diagnosis, several tests need to be performed to rule out a systemic illness, such as kidney failure, liver disease, etc. Your cat showed evidence of liver disease — the jaundice — but it is difficult to say what the cause is. Your cat's failure to eat for a few days (some cats can develop hepatic lipidosis — a liver disorder — if they do not eat for several days) as your veterinarian suggested, could be the culprit.

Another problem that can cause chronic vomiting and jaundice is feline pancreatitis or “triaditis,” the term veterinarians use to describe a syndrome that is a combination of cholangiohepatitis, which is liver inflammation, pancreatitis and inflammatory bowel disease. I think your cat needs to have further diagnostics performed. An abdominal ultrasound would be a good starting place. This would allow assessment of the liver to look for changes consistent with liver disease, the pancreas to see if pancreatitis is a possibility and the intestinal tract to see if the intestines look thickened or irregular. Your vet also should consider running a test called a PLI, which is a simple blood test that is now considered the best test for diagnosing pancreatitis in cats. If the intestines look abnormal on the ultrasound, your cat might need to have a procedure performed called an endoscopy, so that the intestines can be assessed in more detail, and biopsy specimens can be obtained. Inflammatory bowel disease is a common cause of persistent vomiting in cats, and an endoscopy is an excellent and fairly non-invasive way to obtain a diagnosis.

If you choose not to pursue further diagnostics, then consider feeding a hypoallergenic diet, which is a diet that contains a novel protein source, such as rabbit, venison or duck, in case a food allergy is the cause of your cat's chronic vomiting.

See other causes of cat vomit here >>
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Reader Comments

Janet    Bethlehem, PA

8/27/2013 3:09:54 PM


Teresa    Richmond, IN

1/23/2013 5:56:55 PM

One of my cats threw up all the time from when we 1st got her, took her to the vet several times and they would say they thought she had fur balls. Last May took her to an unfamiliar vet because she would not eat,the doc said she had a mass in her abdomen and it needed to come out I got scared and took her to an animal hospital I was familiar with and one of the vets said she was constipated,kept her over night and gave her 2 enemas, she kept having problems and I kept taking her back and he would say he thought her problem was her hyperthyrodism, she was losing weight and not eating so I was force feeding her chicken baby food and running her back and forth to the vet, when one day i made an appointment and he was not in and she saw the owner of the hospital this was on Aug.9, and she did have a mass in her abdomen which was cancer and she had to be euthanized. I feel so terrible because I am wondering if this could have been the reason why she threw up a lot and something could have been to help her and mad at myself for trusting the vet who misdiagnosised her.

DS    Midlothian, TX

5/30/2010 11:16:40 PM

OUr cat was dx with addison disease many years ago as cause to vomiting. Nothing really to be done. She does vomit, but but we give her hairball gel from the vet that helps keep it at min. and always keep her box clean, and of course fresh water at hand. We were told to keep her food available to her because she has always been a tiny cat, she is older now almost 14, full blood persian, and has never changed behavior until recently. She has taken up to meowing in the middle of the night. I think it is because we have made lots of changes in the household, lots of moving stuff out, son moving away, going from full house to just dh and myself. What do you guys think?

Janet    Bethlehem, PA

10/19/2009 4:46:32 AM

good article thanks

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