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WHO naming stem · prefix · 56 listed names

io-

iodine-containing contrast media

WHO's definition, quoted as written in the 2024 stem book
Names only. This page is about io- 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 io-. So the letters io sit at the start of the name (io…).

All 56 names WHO lists under io-

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. iobenzamic acid
  2. iobitridol
  3. iobutoic acid
  4. iocarmic acid
  5. iocetamic acid
  6. iodamide
  7. iodecimol
  8. iodetryl
  9. iodixanol
  10. iodophthalein sodium
  11. iodoxamic acid
  12. iofendylate
  13. ioforminol
  14. iofratol
  15. ioglicic acid
  16. ioglucol
  17. ioglucomide
  18. ioglunide
  19. ioglycamic acid
  20. iohexol
  21. iolidonic acid
  22. iolixanic acid
  23. iomeglamic acid
  24. iomeprol
  25. iomorinic acid
  26. iopamidol
  27. iopanoic acid
  28. iopentol
  29. iophenoic acid
  30. ioprocemic acid
  31. iopromide
  32. iopronic acid
  33. iopydol
  34. iopydone
  35. iosarcol
  36. iosefamic acid
  37. ioseric acid
  38. iosimenol
  39. iosimide
  40. iosulamide
  41. iosumetic acid
  42. iotalamic acid
  43. iotasul
  44. iotetric acid
  45. iotranic acid
  46. iotriside
  47. iotrizoic acid
  48. iotrolan
  49. iotroxic acid
  50. ioversol
  51. ioxabrolic acid
  52. ioxaglic acid
  53. ioxilan
  54. ioxitalamic acid
  55. ioxotrizoic acid
  56. iozomic acid

Decode another name

Decoded

iohexol

Listed INNCarries the WHO stem io-

  • io-start of the nameWHO lists it hereWHO definition: iodine-containing contrast media

“iohexol” is an INN that WHO lists under io- 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 io- (Part II B) and the 56 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.