What is the primary indication for the use of meclizine?

Meclizine is primarily indicated for the prevention and treatment of motion sickness. It is an antihistamine that works by blocking certain signals in the brain that can cause nausea and vomiting, particularly those associated with the vestibular system, which is involved in balance and spatial orientation. When individuals experience motion sickness, they often experience symptoms such as dizziness, nausea, and vomiting. By alleviating these symptoms, meclizine effectively helps those who are susceptible to motion sickness, such as travelers, by enabling them to tolerate various modes of transportation more comfortably.

While other options like post-operative nausea, chemotherapy-induced nausea, and liver disease may involve nausea, meclizine is specifically designed for motion sickness rather than general management of nausea from other causes.