Widely used as an antihistamine to relieve allergy symptoms such as rash, itching, and runny nose. Commonly prescribed to prevent and treat motion sickness, including nausea, vomiting, and dizziness. Frequently used in combination with other medications to enhance pain relief or manage post-operative nausea. Also utilized for its sedative properties to help with short-term sleep problems or to calm patients before surgery. Often included in cold and cough formulations due to its ability to reduce symptoms and induce drowsiness.