Displaying 3 results of Flupirtine Stable Isotopes Flupirtine is a drug that is used for the treatment of pain and inflammation. It works by targeting the brain and spinal cord to reduce pain levels. Stable isotopes of flupirtine have been developed for use in research studies. These isotopes have identical chemical and physical properties to the non-labeled compound, making them ideal for use in metabolic studies and drug development research.