Levothyroxine (l-thyroxine) is a?

• A. Incontinence treatment
• B. Muscle Relaxant
• C. Hormone
• D. Ophthalmic Preparation (eye medication)

Answer: (C)

Levothyroxine is a hormone. It is a synthetic form of thyroxine (T4), the thyroid hormone that helps regulate metabolism and energy use throughout the body. In veterinary medicine, it is used as hormone replacement therapy for hypothyroidism, most commonly in dogs, to restore normal thyroid function and metabolic rate. Because it acts systemically, it isn’t anything like an incontinence treatment, a muscle relaxant, or an eye medication, which is why the other options don’t fit. In short, levothyroxine serves to replace deficient thyroid hormone in the body.