Displaying 2 results of Thiorphan Stable Isotopes Thiorphan is a stable isotope used in pharmaceutical research to study the effects of opioid peptides. It is a potent inhibitor of endogenous enkephalinase, an enzyme that breaks down endorphins and enkephalins in the brain. Thiorphan stable isotopes can be used in radiolabeling studies to track the pharmacokinetics and metabolism of thiorphan in vivo. These isotopes are essential tools in understanding the mechanisms of opioid regulation in the nervous system and can help develop new treatments for pain and addiction.