How is dosing of an allergen extract measured in the treatment of asthma?

Updated: Nov 20, 2020
  • Author: Michael J Morris, MD, FACP, FCCP; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
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Dosing of allergen extracts is in bioequivalent allergy units (BAU), weight per volume (w/v), or protein nitrogen units (PNU), but "major allergen content" may be a more standardized and reliable method of dosing and characterizing allergen extracts; however, not all allergens have been standardized. Extracts with modifications that decrease allergenicity (adverse reactions) without reducing immunogenicity (effectiveness) are under investigation.

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