Displaying 2 results of Proguanil Stable Isotopes Proguanil is used as an antimalarial drug and is a prodrug that is metabolized in the liver to an active form. Proguanil stable isotopes are isotopically labeled forms of proguanil that are used in research and development studies. These stable isotopes are used to study the pharmacokinetics and metabolism of proguanil in the body, as well as to develop new analytical methods for detecting and quantifying the drug in biological samples. Stable isotopes have the same chemical properties as the non-labeled compound, but their unique mass allows for easy detection and quantification.