What can i do to fight my cat allergy?

Immunotherapy: If you have a cat allergy, that means that your body has developed a sensitivity to the cat allergen, fel d1. The only way to "fight" this allergy is to start immunotherapy, as this will develop a "natural" tolerance to the cat allergy. There are no other alternatives available. Medications will help control the symptoms (essentially suppressing the symptoms while you are on medication).