Displaying 3 results of Guaifenesin Stable Isotopes Guaifenesin is a medication used to treat cough and chest congestion. Stable isotopes of guaifenesin are non-radioactive forms of the molecule that are used in research and diagnostic applications. These isotopes are chemically identical to the natural form of guaifenesin, but contain a different number of neutrons in the nucleus, allowing for precise tracking and measurement in biological systems. They are useful tools for studying drug metabolism, drug interactions, and other aspects of pharmacology.