WHO naming stem · suffix · 11 listed names
-prim
antibacterials, dihydrofolate reductase (DHFR) inhibitors, trimethoprim analogues
Where it sits in a name
WHO writes the stem as -prim. So the letters prim sit at the end of the name (…prim).
All 11 names WHO lists under -prim
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.
- aditoprim
- baquiloprim
- brodimoprim
- epiroprim
- iclaprim
- metioprim
- ormetoprim
- talmetoprim
- tetroxoprim
- trimethoprim
- vaneprim
Decode another name
Decoded
iclaprim
Listed INNCarries the WHO stem -prim
- -primend of the nameWHO lists it hereWHO definition: antibacterials, dihydrofolate reductase (DHFR) inhibitors, trimethoprim analogues
“iclaprim” is an INN that WHO lists under -prim 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 -prim (Part II B) and the 11 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.