Maropitant is primarily used in veterinary medicine as an antiemetic, effectively preventing and treating vomiting in dogs and cats. It is particularly useful in managing acute vomiting caused by conditions such as gastroenteritis, chemotherapy-induced nausea, and motion sickness. The drug works by blocking neurokinin-1 (NK1) receptors in the brain, which are involved in the vomiting reflex. It is often administered orally or via injection, depending on the severity of the condition. Maropitant is also used preoperatively to reduce the risk of postoperative nausea and vomiting in animals undergoing surgery. Its efficacy and safety profile make it a widely trusted option for veterinarians in managing emesis in pets.