What condition does Felimazole treat?

Felimazole, also known by its generic name methimazole, is specifically indicated for the treatment of feline hyperthyroidism. This condition occurs when a cat's thyroid gland becomes overactive, producing excessive amounts of thyroid hormone. Symptoms can include increased appetite, weight loss, increased thirst, hyperactivity, and sometimes vomiting.

Methimazole works by inhibiting the production of thyroid hormones, helping to manage the symptoms associated with hyperthyroidism and improve the cat's overall health. The selection of Felimazole for this condition is critical because it directly addresses the underlying hormonal imbalance, making it an effective therapeutic option for affected cats.

The other conditions listed do not relate to the action of Felimazole. For instance, diabetes involves insulin regulation, while vomiting can have various causes unrelated to thyroid function. Heart disease deals with cardiovascular health, which is also outside the scope of what Felimazole is designed to treat. Therefore, it is clear that B, feline hyperthyroidism, is the condition that Felimazole is used to manage.