The Oxford Biblical Studies Online and Oxford Islamic Studies Online have retired. Content you previously purchased on Oxford Biblical Studies Online or Oxford Islamic Studies Online has now moved to Oxford Reference, Oxford Handbooks Online, Oxford Scholarship Online, or What Everyone Needs to Know®. For information on how to continue to view articles visit the subscriber services page.

Related Content

Related Overviews


More Like This

Show all results sharing these subjects:

  • Science and technology
  • Psychology


Show Summary Details



Quick Reference

An anabolic steroid used to increase muscle growth, developed secretly by attaching four hydrogen atoms to the steroid drug gestrinone for the specific purpose of making its metabolites undetectable in the urine of a person taking it, and used by athletes as a performance enhancer. In 2003 a test was developed for detecting it in urine samples, and several prominent athletes were penalized. THG abbrev. [From Greek tetra- four + hydor water + gestrinone a drug with a weak progestin and strong anti-progesterone action, used for treating endometriosis]

Reference entries