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



CAS registry number (Chemical Abstracts Service)


Therapeutic Category

Anthelmintic agent

Chemical Names

[Component B1a: Avermectin A1a, 4''-(acetylamino)-5-O-demetyl-4''-deoxy-, (4''R)-] and [Component B1b: Avermectin A1a, 4''-(acetylamino)-5-O-demetyl-25-de(1-metylpropyl)-4''deoxy-25-(1-metyletyl)-, (4''R)-]

A mixture of two components having a ratio of 90% or more of eprinomectin component B1a and 10% or leβ of eprinomectin component B1b (USAN)

Foreign Names

  • Eprinomectinum (Latin)
  • Eprinomectin (German)
  • Eprinomectine (French)
  • Eprinomectina (Spanish)

Generic Names

  • Eprinomectin (OS: USAN)
  • MK 397 (Merck) (IS)
  • Eprinomectin (PH: USP 41)

Brand Names


ISInofficial Synonym
OSOfficial Synonym
PHPharmacopoeia Name
Rec.INNRecommended International Nonproprietary Name (World Health Organization)
USANUnited States Adopted Name

Further information on drug naming conventions: 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.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.