Displaying 10 results of Tofacitinib Stable Isotopes Tofacitinib is a medication used to treat rheumatoid arthritis and psoriasis. Stable isotopes of tofacitinib are used for research purposes, such as in drug metabolism studies. These isotopes have the same chemical properties as the non-labeled tofacitinib, but contain a different number of neutrons, making them useful for tracking and measuring the drug's effectiveness in the body. Tofacitinib stable isotopes are important tools for advancing our understanding of this medication and its potential uses.