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4.25 Chemical, medical and pharmacological terms

In text, do not capitalize the names of chemical elements and compounds:

  • krypton
  • sodium bicarbonate
  • hydrogen peroxide

The capitalization of chemical symbols should follow standard practice:

  • H2O
  • NaHCO3

Do not capitalize the names of conditions, syndromes and the like, but capitalize a personal name that forms part of such a term:

  • diabetes insipidus
  • Down syndrome
  • Huntington’s chorea

Capitalize the names of infectious organisms but not the names of conditions based upon such names:

  • People attacked by Salmonella are likely to suffer from salmonellosis.

Do not capitalize the generic names of drugs:

  • phenobarbital
  • sulfasalazine