Clonixin is a non-steroidal anti-inflammatory drug (NSAID) that is used in the treatment of pain and inflammation. Stable isotopes of Clonixin are used in pharmacokinetic studies to better understand the absorption, distribution, metabolism, and excretion of the drug in the body. These isotopes are also used in the development of new drugs and in the evaluation of drug-drug interactions. Overall, the use of stable isotopes of Clonixin helps researchers and clinicians gain a better understanding of the pharmacological properties of the drug, leading to improved patient outcomes.