Norastemizole Hydrobromide is primarily utilized in the field of medical research, particularly in studies related to allergic reactions and histamine responses. It serves as a metabolite of astemizole, a compound known for its antihistamine properties. Researchers often employ it to investigate the mechanisms of histamine H1 receptor antagonism, which is crucial for understanding and developing treatments for conditions like allergies, asthma, and other inflammatory disorders. Its role in these studies helps in the development of more effective and safer antihistamine drugs, contributing to advancements in therapeutic strategies for managing allergic diseases.