Displaying 5 results of Nortriptyline Stable Isotopes Nortriptyline is a tricyclic antidepressant used to treat depression, neuropathic pain, and migraines. Nortriptyline stable isotopes are isotopically labeled versions of nortriptyline, which can be used in pharmacokinetic studies to track the drug's metabolic pathways in vivo. These stable isotopes are useful tools for drug development and can aid in understanding the pharmacokinetics of nortriptyline in the human body.