ABH hydrochloride is primarily used in research settings as a pharmacological tool to study the effects of histamine receptors, particularly H3 receptors, in the central nervous system. It acts as an antagonist, helping researchers understand the role of histamine in regulating neurotransmitter release, which is crucial for studying conditions like sleep disorders, cognitive functions, and neurodegenerative diseases. Additionally, it is utilized in preclinical studies to explore potential therapeutic applications for disorders such as ADHD, schizophrenia, and obesity, where histamine signaling plays a significant role.