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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 Name

(RS)-2-[1-Metyl-2-(4-phenoxyphenoxy)etoxy]pyridin (IUPAC)

Foreign Name

  • Pyriproxifen (German)

Generic Names

  • Pyriproxyfen (OS: JAN)
  • HSDB 7053 (IS)
  • OMS 3019 (IS)
  • S 31183 (IS)
  • S 9138 (IS)
  • SK 591 (IS)

Brand Names

  • Bolfo (Pyriproxyfen and Cyfluthrin (veterinary use))
    Bayer, Germany
  • Cyclio (veterinary use)
    Virbac, Netherlands; Virbac, Switzerland; Virbac S.A., Ireland
  • Duogard (Pyriproxyfen and Permethrin (veterinary use))
    Virbac, Australia
  • Duowin (Pyriproxyfen and Permethrin (veterinary use))
    Virbac, Switzerland; Virbac, France; Virbac, United Kingdom; Virbac, Italy; Virbac, Poland; Virbac S.A., Ireland
  • Ease-On (Pyriproxyfen and Permethrin (veterinary use))
    Troy Laboratories, Australia
  • Fleaban (Pyriproxyfen and Dimpylate (veterinary use))
    Exelpet Products, Australia
  • Indorex (Pyriproxyfen and Permethrin, + Piperonyl Butoxide (veterinary use))
    Virbac, Germany; Virbac, New Zealand
  • Johnson's 4Fleas Protector (veterinary use)
    Alfamed, United Kingdom
  • Palatable Flea Control (veterinary use)
    Exelpet Products, Australia
  • Petscription Triplegard (Pyriproxyfen and Piperonyl Butoxide, + Permethrin (veterinary use))
    Virbac, New Zealand
  • Pustix Duo (Pyriproxyfen and Permethrin (veterinary use))
    VĂ©to-Centre, France
  • Pyriproxyfen Virbac (veterinary use)
    Virbac, United Kingdom
  • Spot-on Flea Control for Cats and Kittens (veterinary use)
    Exelpet Products, Australia
  • Tamirex (Pyriproxyfen and Cyfluthrin (veterinary use))
    Bayer, Germany
  • Tick off Combi (Pyriproxyfen and Permethrin (veterinary use))
    Bridgefarma, Netherlands
  • Twin Spot (veterinary use)
    Bridgefarma, Netherlands
  • Ultrum (Pyriproxyfen and Permethrin, + Bioallethrin, + Piperonyl Butoxide (veterinary use))
    Kyron, South Africa


IUPACInternational Union of Pure and Applied Chemistry
ISInofficial Synonym
JANJapanese Accepted Name
OSOfficial Synonym

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.