Displaying 4 results of Tramadol Stable Isotopes Tramadol Stable Isotopes are variants of the pain-relieving drug tramadol that contain isotopes with a stable atomic mass. These isotopes are used in scientific research and drug development to study the metabolism, pharmacokinetics, and pharmacodynamics of tramadol in the body. Tramadol stable isotopes are valuable tools for understanding the mechanisms of action of tramadol, as well as for developing new drugs that target pain relief.