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WHO naming stem · prefix · 10 listed names

rifa-

antibiotics, rifamycin derivatives

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

All 10 names WHO lists under rifa-

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. rifabutin
  2. rifalazil
  3. rifametane
  4. rifamexil
  5. rifamide
  6. rifampicin
  7. rifamycin
  8. rifapentine
  9. rifaxidine
  10. rifaximin

Decode another name

Decoded

rifamide

Listed INNCarries the WHO stem rifa-

  • rifa-start of the nameWHO lists it hereWHO definition: antibiotics, rifamycin derivatives

“rifamide” is an INN that WHO lists under rifa- 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 rifa- (Part II B) and the 10 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.