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WHO naming stem · suffix · 152 listed names

-ium

quaternary ammonium compounds

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

All 152 names WHO lists under -ium

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. aclatonium napadisilate
  2. aclidinium bromide
  3. acriflavinium chloride
  4. alcuronium chloride
  5. amantanium bromide
  6. ambenonium chloride
  7. atracurium besilate
  8. azamethonium bromide
  9. benzalkonium chloride
  10. benzethonium chloride
  11. benzilonium bromide
  12. benzododecinium chloride
  13. benzopyrronium bromide
  14. benzoxonium chloride
  15. benzpyrinium bromide
  16. beperidium
  17. bevonium metilsulfate
  18. butropium bromide
  19. candocuronium iodide
  20. carpronium chloride
  21. cefalonium
  22. cefmepidium chloride
  23. cetalkonium chloride
  24. cethexonium chloride
  25. cetrimonium bromide
  26. cetylpyridinium chloride
  27. chlorphenoctium amsonate
  28. ciclonium bromide
  29. ciclotropium bromide
  30. cimetropium bromide
  31. cisatracurium besilate
  32. clidinium bromide
  33. cyclopyrronium bromide
  34. dacuronium bromide
  35. decamethonium bromide
  36. deditonium bromide
  37. demecarium bromide
  38. denatonium benzoate
  39. dequalinium chloride
  40. dicolinium iodide
  41. dimecolinium iodide
  42. dimethyltubocurarinium chloride
  43. dimetipirium bromide
  44. diponium bromide
  45. disiquonium chloride
  46. dodeclonium bromide
  47. dofamium chloride
  48. dotefonium bromide
  49. doxacurium chloride
  50. droclidinium bromide
  51. emepronium bromide
  52. etipirium iodide
  53. fazadinium bromide
  54. fenclexonium metilsulfate
  55. fenpiverinium bromide
  56. fentonium bromide
  57. fludazonium chloride
  58. flutropium bromide
  59. fubrogonium iodide
  60. furazolium chloride
  61. furtrethonium iodide
  62. gantacurium chloride
  63. glycopyrronium bromide
  64. halopenium chloride
  65. hedaquinium chloride
  66. heteronium bromide
  67. hexafluronium bromide
  68. hexamethonium bromide
  69. hexasonium iodide
  70. hexocyclium metilsulfate
  71. hexopyrronium bromide
  72. ipratropium bromide
  73. lapirium chloride
  74. laudexium metilsulfate
  75. lauralkonium chloride
  76. laurcetium bromide
  77. laurolinium acetate
  78. mebezonium iodide
  79. mecetronium etilsulfate
  80. metalkonium chloride
  81. methanthelinium bromide
  82. methylbenactyzium bromide
  83. methylbenzethonium chloride
  84. methylrosanilinium chloride
  85. methylthioninium chloride
  86. metocinium iodide
  87. miripirium chloride
  88. miristalkonium chloride
  89. mivacurium chloride
  90. nolinium bromide
  91. octafonium chloride
  92. opratonium iodide
  93. otilonium bromide
  94. oxapium iodide
  95. oxapropanium iodide
  96. oxitefonium bromide
  97. oxitropium bromide
  98. oxydipentonium chloride
  99. oxyphenonium bromide
  100. oxypyrronium bromide
  101. oxysonium iodide
  102. pancuronium bromide
  103. penoctonium bromide
  104. pentacynium chloride
  105. pentamethonium bromide
  106. pentapiperium metilsulfate
  107. pentolonium tartrate
  108. phenactropinium chloride
  109. pipecuronium bromide
  110. piprocurarium iodide
  111. pirralkonium bromide
  112. polidronium chloride
  113. polixetonium chloride
  114. prifinium bromide
  115. prodeconium bromide
  116. prolonium iodide
  117. rapacuronium bromide
  118. ritropirronium bromide
  119. rocuronium bromide
  120. sanguinarium chloride
  121. sepazonium chloride
  122. sintropium bromide
  123. sofpironium bromide
  124. stercuronium iodide
  125. stilonium iodide
  126. sultroponium
  127. suxamethonium chloride
  128. suxethonium chloride
  129. tematropium metilsulfate
  130. tetradonium bromide
  131. tetrylammonium bromide
  132. thiazinamium metilsulfate
  133. tiametonium iodide
  134. tibezonium iodide
  135. tiemonium iodide
  136. timepidium bromide
  137. tiodonium chloride
  138. tiotropium bromide
  139. tiquizium bromide
  140. toliodium chloride
  141. toloconium metilsulfate
  142. tonzonium bromide
  143. trantelinium bromide
  144. trepirium iodide
  145. triclobisonium chloride
  146. trimethidinium methosulfate
  147. trospium chloride
  148. truxicurium iodide
  149. truxipicurium iodide
  150. umeclidinium bromide
  151. vecuronium bromide
  152. xenytropium bromide

Decode another name

Decoded

beperidium

Listed INNCarries the WHO stem -ium

  • -iumend of the nameWHO lists it hereWHO definition: quaternary ammonium compounds

“beperidium” is an INN that WHO lists under -ium 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 -ium (Part II B) and the 152 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.