Felimazole Tablets - 5mg Felimazole 5mg Tablets are indicated for the treatment of hyperthyroidism in cats. Felimazole Tablets are used in the effective treatment of hyperthyroidism in cats. Felimazole attempts to restore normal levels of Thyroxine, the hormone that is responsible for controlling the pace of all bodily processes. In cases of hyperthyroidism, the thyroid gland produces too much of the hormone, Thyroxine, which causes biological processes to occur at a greater rate. Felimizole is used in the stabilisation of Thyroxine levels prior to surgical intervention. When given as directed by your vet, the active ingredient, Thiamazole, affects the synthesis of Thyroxine to lower Thyroid levels, providing a better quality of life for your cat. Felimazole 5mg Tablets are manufactured by Dechra and developed specifically for cats. As such, they must never be used in other animals.