Anti-Allergy Therapy in Cats

Anti-Allergy Therapy in Cats - Conditions Treated, Procedure, Efficacy, Recovery, Cost, Considerations, Prevention

What is Anti-Allergy Therapy?

Cats can develop allergies just like humans. Although there is no cure for allergies in cats, allergies can be treated and managed in two ways. The first of these is treating the symptoms of an allergic reaction. The second is to increase the cat’s tolerance to an allergen by introducing the allergen in small amounts into the cat’s system. This is known as allergen-specific immunotherapy. Immunotherapy is usually carried out via injection, but may also be administered orally. (Oral allergy treatment is known as sublingual immunotherapy.) Rather than covering the ways in which allergic reactions can be treated, this guide will dicuss how immunotherapy works to increase a cat’s tolerance to an allergen.

Anti-Allergy Therapy Procedure in Cats

The immunotherapy procedure generally remains the same despite which allergen the cat is being treated for. Cats receiving immunotherapeutic injections will need to attend weekly appointments for the therapy to be effective.


  • The vet will first need to conduct blood allergy tests approximately four weeks after the first allergic reaction to confirm the allergy.
  • Once the blood allergy test has confirmed the diagnosis, treatment can begin.
  • The vet will first prepare the injection. This injection will be specific to the patient, and will contain an extract of the allergen.
  • The vet will inject the allergen into the bloodstream. The first injection will have the smallest dose of the allergen. The dosage will gradually increase with subsequent treatments.
  • Injections will take place each week, until the maintenance dose is reached. After this occurs, injections will take place bi-weekly or monthly.
  • Immunotherapy typically lasts for one year, but may last for the cat’s lifetime.


  • The vet will prescribe special allergy drops.
  • These drops should be administered under the tongue twice a day for a minimum of one year.

Efficacy of Anti-Allergy Therapy in Cats

Immunotherapy is typically very effective in cats with allergies. Studies show that allergen-specific immunotherapy has a roughly 73% success rate. This means that the cats were either completely freed from allergy symptoms or the severity of the symptoms had greatly improved. Cats that only showed a mild improvement also required additional therapy, such as topical treatments, to alleviate their symptoms. Cats that have suffered from an allergy for several years prior to receiving allergen-specific immunotherapy – at least six years – may not benefit as much from immunotherapy as cats that have been diagnosed and treated within two years.

The efficacy of sublingual immunotherapy is approximately 60%. While this seems to suggest that it is less effective than allergen-specific immunotherapy, it is important to note that sublingual immunotherapy may be a better option for cats that do not respond well to allergen-specific immunotherapy.

Anti-Allergy Therapy Recovery in Cats

Due to the nature of immunotherapy, cats will not need to recover. There is a very small chance – approximately 2% -- that cats receiving immunotherapy will suffer from an anaphylactic reaction following the administration of immunotherapy. For cats, there is an increased risk of anaphylactic reaction with allergen-specific immunotherapy compared to sublingual immunotherapy.

Cost of Anti-Allergy Therapy in Cats

The cost of immunotherapy will vary based on standards of living and additional costs incurred. The average cost of immunotherapy is approximately $600 per year, or approximately $50 per month.

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Cat Anti-Allergy Therapy Considerations

Sublingual immunotherapy may be recommended for cats that did not respond well to allergen-specific immunotherapy. Although painless, sublingual immunotherapy may be more difficult for owners to administer due to the location and frequency of dosing. It is important to note that allergy drops cannot be administered to the cat’s food – they must be placed under the tongue.

While the goal of immunotherapy is to reduce the severity of allergic reactions, it is up to owners to ensure their cats do not come into contact with an allergen once their cat’s allergy has been identified. Immunotherapy may be used in addition to other treatment methods based on the cat’s symptoms.

Anti-Allergy Therapy Prevention in Cats

It may not be possible to prevent the development of allergies. However, once an allergen has been identified, owners should prevent their cats from coming into contact with the allergen in order to avoid a reaction.

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