Final answer:
Acepromazine is a phenothiazine drug commonly used as a preanesthetic in veterinary medicine. It has sedative and tranquilizing effects, making it useful for calming anxious or excitable patients before surgery.
Step-by-step explanation:
Acepromazine is a phenothiazine drug that is commonly used as a preanesthetic in veterinary medicine. It has sedative and tranquilizing effects, making it useful for calming anxious or excitable patients before surgery. However, it is important to note that acepromazine should not be used in patients with liver disease, as it can cause liver damage.