Displaying 9 results of Citalopram Stable Isotopes Citalopram Stable Isotopes are a set of specially labeled versions of the drug citalopram, which is commonly used as an antidepressant. These isotopes allow researchers to trace the drug's metabolic pathways within the human body, as well as to study its effects on brain chemistry and behavior. This information can be used to develop more effective treatments for depression and related disorders.