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WHO naming stem · infix · 20 listed names

-orph-

opioid receptor antagonists/agonists, morphinan derivatives

WHO's definition, quoted as written in the 2024 stem book
Names only. This page is about -orph- as a part of a name. It has nothing on uses, doses, side effects or interactions of any medicine that carries it, and nothing here is medical advice. Ask a pharmacist or doctor about the medicine itself.

Where it sits in a name

WHO writes the stem as -orph-. So the letters orph sit inside the name, with letters before and after it (…orph…).

All 20 names WHO lists under -orph-

These are the INN in group (a) of Part IV of the stem book: names in which WHO says the stem is used as defined. The stem is marked where WHO places it. A-Z as WHO lists them.

  1. acetorphine
  2. alletorphine
  3. asalhydromorphone
  4. buprenorphine
  5. cyprenorphine
  6. desomorphine
  7. diprenorphine
  8. etorphine
  9. homprenorphine
  10. hydromorphinol
  11. hydromorphone
  12. methyldesorphine
  13. methyldihydromorphine
  14. morphine glucuronide
  15. nalorphine
  16. nicomorphine
  17. normorphine
  18. oxymorphone
  19. pentamorphone
  20. semorphone

Decode another name

Decoded

etorphine

Listed INNCarries the WHO stem -orph-

  • -orph-inside the nameWHO lists it hereWHO definition: opioid receptor antagonists/agonists, morphinan derivatives

“etorphine” is an INN that WHO lists under -orph- in the 2024 stem book.

The same decoder as the front page: it reads the letters of a name against all 482 WHO stems, in your browser.

Source and licence

The definition of -orph- (Part II B) and the 20 names (Part IV, group (a)) are from Use of stems in the selection of International Nonproprietary Names (INN) for pharmaceutical substances, 2024 (World Health Organization, Stem book 2024 (ISBN 978-92-4-009938-8); covers proposed INN Lists 1-129). Checked .

Adapted from: Use of stems in the selection of International Nonproprietary Names (INN) for pharmaceutical substances, 2024. Geneva: World Health Organization; 2024. Licence: CC BY-NC-SA 3.0 IGO. This adaptation was not created by WHO; WHO is not responsible for its content or accuracy and does not endorse this site. The data file stems.json is shared under the same licence.