Displaying 6 results of Sulfamethoxazole Stable Isotopes Sulfamethoxazole is a commonly used antibiotic that is used to treat a wide range of bacterial infections. Stable isotopes of sulfamethoxazole are isotopes that do not decay over time, making them useful in medical research and drug development. These isotopes can be used to track the movement of the drug through the body and to study the pharmacokinetics of the drug. They are also used in the development of new drugs and in the testing of drug interactions.