Prepare for unexpected vet bills

What are Amoxicillin Allergies?

Amoxicillin allergies can be detected through an allergy skin test performed by a vet. But unfortunately, many cat owners do not realize their cat has amoxicillin allergies until a reaction occurs after exposure to the medication. At this point, your cat will need immediate medical attention. If an allergic reaction is left untreated, it can quickly become fatal, so it’s important to take your cat to a vet as soon as possible.

Amoxicillin is an antibiotic that is widely used to treat bacterial infections in cats. The most common brand names of amoxicillin are Clavamox and Augmentin. This medication is effective in treating respiratory, bladder, skin, ear, and tooth infections. However, some cats are allergic to amoxicillin, and if they are exposed to it, can experience a wide range of symptoms including skin rashes, fever, swelling, difficulty breathing, vomiting, and diarrhea. The exact cause of allergies—in cats and in humans—is unknown, so any cat could have amoxicillin allergies. 

Vet bills can sneak up on you.

Plan ahead. Get the pawfect insurance plan for your pup.

Compare plans
advertisement image

Amoxicillin Allergies Average Cost

From 543 quotes ranging from $500 - $6,000

Average Cost

$2,000

Symptoms of Amoxicillin Allergies in Cats

If your cat is allergic to amoxicillin, any exposure to this medication will produce a reaction. Unfortunately, you may not know your cat is allergic to amoxicillin until he has one of these reactions. The severity of the reaction will vary from cat to cat, however the symptoms remain the same. Some of the symptoms you may observe include:

  • Skin rashes
  • Fever
  • Facial swelling
  • Swelling of the limbs
  • Difficulty breathing
  • Elevated heartbeat
  • Vomiting
  • Diarrhea
  • Unsteadiness
arrow-up-icon

Top

Causes of Amoxicillin Allergies in Cats

Some cats have amoxicillin allergies, while others do not. There is no known cause for allergies, so it’s impossible to determine why your cat is allergic to amoxicillin. If your cat is allergic to amoxicillin, he will experience an allergic reaction after any kind of exposure to it. These reactions can be dangerous, so it’s important to work with a vet to determine if your cat has allergies early on in his life.

arrow-up-icon

Top

Diagnosis of Amoxicillin Allergies in Cats

Your cat will not exhibit any symptoms of having amoxicillin allergies unless he has come into contact with the medication. If he has, bring him into a veterinarian as soon as possible. After the vet has stabilized his condition, he may suggest having your cat tested to determine what caused the reaction.

To identify allergens, a vet will perform a series of skin tests on your cat. The vet will administer a very small amount of any suspected allergens, including amoxicillin, foods, pollen, and dust, to the cat’s skin using a tiny needle that scratches the skin’s surface. After an allergen is applied to the cat’s skin, the vet will look for a reaction in the form of a red bump. If no bumps occur, the cat is not allergic to that allergen. 

These skin tests are usually only performed after your cat has experienced an allergic reaction to something. However, allergic reactions can be life-threatening. If you want to be safe and determine if your cat has allergies prior to a reaction occurring, talk to your vet about whether or not a skin test can be done in the absence of symptoms.

arrow-up-icon

Top

Treatment of Amoxicillin Allergies in Cats

If skin testing reveals that your cat has an amoxicillin allergy, immunotherapy treatment may be performed. After the skin testing, the vet will create a special serum containing small amounts of the amoxicillin allergen. The serum will be injected into your cat in small quantities over time. The first injection will have the smallest quantity of amoxicillin, and the amount will gradually increase in every injection after the initial one. As a result of this treatment, your cat will experience less severe symptoms if he is ever exposed to amoxicillin again. 

The first injection will likely be administered in the vet’s office so the vet can closely monitor your cat’s reaction to the serum. But after the initial injection, the vet may ask if you are comfortable administering the next treatments on your own. If you don’t feel comfortable, you can make appointments to bring your cat into the vet for his injections.

arrow-up-icon

Top

Recovery of Amoxicillin Allergies in Cats

Most cats will respond very well to immunotherapy, and will no longer exhibit any severe symptoms if they are exposed to amoxicillin. To get the desired results, it’s important that you closely follow your vet’s instructions and administer all injections as required. 

While your cat is being treated, or if you choose not to do immunotherapy, you will need to prevent any exposure to amoxicillin to avoid an allergic reaction. Amoxicillin is often prescribed when your cat has an infection, so you will need to ensure your cat is never given amoxicillin when being treated. Make sure you always remind your vet that your cat has an amoxicillin allergy so he knows never to administer this medication when your cat is sick.

arrow-up-icon

Top

*Wag! may collect a share of sales or other compensation from the links on this page. Items are sold by the retailer, not Wag!.

Amoxicillin Allergies Average Cost

From 543 quotes ranging from $500 - $6,000

Average Cost

$2,000

arrow-up-icon

Top

Amoxicillin Allergies Questions and Advice from Veterinary Professionals

Need pet health advice? Ask a vet

question-icon-cta

Ask a Vet

dog-name-icon

Tigger

dog-breed-icon

American Shorthair

dog-age-icon

5 Years

pill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filled

Moderate severity

thumbs-up-icon

1 found helpful

pill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filled

Moderate severity

Has Symptoms

Eye Watering

I took my cat to the vet due to a UTI, she is on clavamox, seems to have helped considerably. But, her left eye started to water and now both are watering terribly. She's been on the med 4 days. No other symptoms. Is this a reaction to the clavamox?

March 18, 2018

Tigger's Owner

answer-icon

recommendation-ribbon

1 Recommendations

Known side effects of Clavamox (amoxicillin and clavulanic acid)are vomiting, diarrhoea, facial swelling, hives, itchy skin and in some cases breathing difficulties. Whilst the skin may become irritated, I don’t know of any irritation to the eyes; you should flush the eyes out to be on the safe side and consult with your Veterinarian on Monday morning to determine whether the watery eyes are related to the medication or not. Regards Dr Callum Turner DVM

March 18, 2018

Was this experience helpful?

dog-name-icon

Kiwi

dog-breed-icon

tabby

dog-age-icon

4 Years

pill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filled

Mild severity

thumbs-up-icon

1 found helpful

pill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filledpill-rating-filled

Mild severity

Has Symptoms

Lump

My cat Kiwi has had a UTI probably twice already this year, many trips to the vet and so on. They put him on the pink liquid amoxicillin, and it did little to nothing for him. So they put him on a stronger medication, "clavamox", a white liquid. I assume his UTI's have been stress related (adopted, then months later my dog was brought here), and purchased feliway to hopefully relieve a lot of his stress & prevent this from happening again. However, I've noticed that he has developed a bump located around one of his lymph nodes. I mentioned this to the vet my last visit, yesterday, and all he had said about it was that it was "palpable", which doesn't do much for me. It does not seem to bother him very much, but I know he is already feeling dumpy because of his UTI. I'm not sure whether this is due to the medication he is taking, a shot he was given (much earlier to prevent vomiting), or other reasons. I doubt another vet visit will tell me much, especially with the advice I was given last time. & I'm stacked on vet payments as well.

Feb. 23, 2018

Kiwi's Owner

answer-icon

recommendation-ribbon

1 Recommendations

Clavamox is another product with amoxicillin but it also contains clavulanic acid which is a beta-lactam inhibitor, the pink amoxicillin may be just without the clavulanic acid (there are many products over many different countries). Anyway, a urinary tract infection may cause discomfort which in turn may result in a lack of activity; lethargy or a reduction in activity isn’t a noted side effect of Clavamox. The bump or swelling of or around a lymph node is not specific; which lymph node? It is not unusual for local lymph nodes to swell when there is an infection or inflammatory response. If there is no improvement with the Clavamox I would recommend that you have a culture and sensitivity test done to narrow in on the specific bacteria causing the infection and the most suitable antibiotic. Regards Dr Callum Turner DVM

Feb. 23, 2018

Was this experience helpful?

Amoxicillin Allergies Average Cost

From 543 quotes ranging from $500 - $6,000

Average Cost

$2,000

Vet bills can sneak up on you.

Plan ahead. Get the pawfect insurance plan for your pup.

advertisement image
ask a vet placeholder
Need pet insurance?