Lazabemide hydrochloride is primarily used in research settings as a selective and reversible inhibitor of monoamine oxidase B (MAO-B). Its application is significant in studying neurodegenerative diseases, particularly Parkinson's disease, as MAO-B inhibitors help regulate dopamine levels in the brain. By blocking the breakdown of dopamine, it aids in improving motor function and reducing symptoms in experimental models. Additionally, it is utilized in pharmacological studies to understand the role of MAO-B in depression and anxiety disorders. Its reversible nature makes it a valuable tool for exploring enzyme kinetics and therapeutic mechanisms without causing long-term enzyme inhibition.