FLB 131 is primarily utilized in the field of neuroscience research due to its role as a selective dopamine D2 receptor antagonist. It is often employed in studies aimed at understanding the mechanisms of dopamine signaling and its implications in various neurological and psychiatric disorders. Researchers use FLB 131 to investigate the effects of dopamine receptor blockade on behavior, cognition, and motor function, providing insights into conditions such as schizophrenia, Parkinson’s disease, and addiction. Additionally, it serves as a valuable tool in pharmacological assays to screen and develop new therapeutic agents targeting dopamine receptors. Its application extends to neuroimaging studies, where it helps in visualizing and quantifying D2 receptor distribution in the brain, aiding in the diagnosis and monitoring of neurological diseases.