Medication Guide App

Usnic Acid

In some countries, this medicine may only be approved for veterinary use.

CAS registry number (Chemical Abstracts Service)


Chemical Formula


Molecular Weight


Therapeutic Category


Chemical Names



2,6-Diacetyl-7,9-dihydroxy-8,9b-dimethyl-1,3(2H,9bh)-dibenzofurandione (IUPAC)

Foreign Names

  • Acidum usnicum (Latin)
  • Usninsäure (German)

Generic Names

  • BRN 1299865 (IS)
  • CCRIS 5518 (IS)
  • NSC-5889 (IS)
  • Usnein (IS)
  • Usniacin (IS)
  • Usninic acid (IS)

Brand Names

  • Avimycin (veterinary use)
    Roenfri, Germany
  • Foot Zeta (Usnic Acid and Undecylenic Acid)
    Zeta, Italy
  • Scabicid (Usnic Acid and Lindane)
    Kimia Farma, Indonesia
  • Steril Zeta (Usnic Acid and Triclosan)
    Zeta, Italy

International Drug Name Search


IUPACInternational Union of Pure and Applied Chemistry
ISInofficial Synonym

Click for further information on drug naming conventions and International Nonproprietary Names.

Important Notice: The international database is in BETA release. This means it is still under development and may contain inaccuracies. It is not intended as a substitute for the expertise and judgement of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that the use of any medication in any country is safe, appropriate or effective for you. Consult with your healthcare professional before taking any medication.