Acepromethazine is primarily used in veterinary medicine as a sedative and tranquilizer for animals. It is often administered to calm animals during transportation, before surgical procedures, or to manage anxiety and aggressive behavior. The compound works by depressing the central nervous system, leading to a calming effect. It is particularly useful in managing stress in large animals like horses and cattle. Additionally, acepromethazine can be combined with other medications to enhance its sedative properties or to provide pain relief. Its effectiveness and relatively low risk of side effects make it a common choice in veterinary practice for ensuring the safety and comfort of animals in various stressful situations.