Displaying 14 results of Doxycycline Stable Isotopes Doxycycline stable isotopes refer to isotopically labeled versions of the antibiotic doxycycline. These isotopes are chemically identical to the naturally occurring form of the drug, but they contain a specific number of stable isotopes that can be used for research or diagnostic purposes. Doxycycline stable isotopes are commonly used in pharmacokinetic studies, drug metabolism studies, and drug interaction studies. They can also be useful in the development of new drugs and therapies.