Clemizole hydrochloride is primarily used in medical research due to its antihistamine properties. It has been studied for its potential to treat various conditions, including allergic reactions and certain viral infections. In recent years, it has gained attention for its role in antiviral research, particularly in inhibiting the replication of specific viruses. Additionally, it has been explored for its effects on ion channels and its potential use in managing arrhythmias. Its application in drug development continues to be an area of interest for scientists.