Displaying 5 results of Theophylline Stable Isotopes Theophylline Stable Isotopes refer to the non-radioactive isotopes of the drug Theophylline, which is commonly used to treat respiratory diseases like asthma and chronic obstructive pulmonary disease. These stable isotopes are used in research studies to trace the metabolic pathway of the drug in the body, and to determine its pharmacokinetics and pharmacodynamics. They are also used in drug development studies to optimize drug dosage and efficacy, and to reduce the risk of adverse effects.