FPL 62064 is primarily used in research settings as a selective inhibitor of phosphodiesterase 4 (PDE4). Its application is significant in studying inflammatory processes and immune responses. By inhibiting PDE4, it helps in understanding the role of cyclic AMP (cAMP) in cellular signaling pathways, which is crucial for developing treatments for inflammatory diseases like asthma, chronic obstructive pulmonary disease (COPD), and rheumatoid arthritis. Additionally, it is utilized in neuroscience research to explore its potential effects on cognitive functions and mood disorders, given PDE4's role in the central nervous system.