Which drug can successfully treat elimination disorders in cats?

Buspirone is recognized for its effectiveness in treating elimination disorders in cats, particularly those related to anxiety and stress. This drug acts as an anxiolytic that helps reduce anxiety-related behavior. In cats, elimination disorders are often rooted in behavioral issues such as anxiety or stress triggered by changes in the environment, insufficient litter box resources, or other factors. By targeting these underlying anxiety issues, buspirone can help modify the cat's behavior, leading to more appropriate urination and defecation habits.

The other options provided are not suited for treating elimination disorders in cats. Diazepam, while it does have anxiolytic properties, is less commonly used for this specific purpose due to potential side effects and the risk of dependence. Phenobarbital is primarily an anticonvulsant, making it ineffective for behavioral issues related to elimination. Furosemide, a diuretic, is used to treat conditions related to fluid retention but does not address behavioral problems associated with elimination disorders. Thus, buspirone stands out as the most appropriate choice for managing these specific issues in feline patients.