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



ATC (Anatomical Therapeutic Chemical Classification)


CAS registry number (Chemical Abstracts Service)


Chemical Formula


Molecular Weight


Therapeutic Categories

Treatment of multiple sclerosis, MS

Potassium channel blocker

Chemical Names

4-Aminopyridine (WHO)

4-Pyridinamine (USAN)

Pyridin-4-amine (IUPAC)

Foreign Names

  • Fampridinum (Latin)
  • Fampridin (German)
  • Fampridine (French)
  • Fampridina (Spanish)

Generic Names

  • Dalfampridine (OS: USAN)
  • 4-AP (IS)
  • 4-Pyridylamine (IS)
  • 4-Pyridylazan (IS)
  • 5-22-09-00106 (IS: Beilstein)
  • Avitrol (IS)
  • BRN 0105782 (IS)
  • EL-970 (IS)
  • Mi-W-3 (IS)
  • NSC 15041 (IS)
  • p-Aminopyridine (IS)
  • Phillips 1861 (IS)
  • Pimadin (IS: free base)
  • VMI 10-3 (IS)

Brand Names

  • Ampyra
    Acorda, United States
  • Fampyra
    Alkermes, Georgia; Biogen, Australia; Biogen, Canada; Biogen, Germany; Biogen, Denmark; Biogen, Spain; Biogen, France; Biogen, Ireland; Biogen, Israel; Biogen, Iceland; Biogen, Portugal; Biogen, Romania; Biogen Idec, Austria; Biogen Idec, Cyprus; Biogen Idec, United Kingdom; Biogen Idec, Italy; Biogen Idec, Lithuania; Biogen Idec, Norway; Biogen Idec, Poland; Biogen Idec, Slovenia; BiogenIdec, Sweden; Medis Adria, Croatia (Hrvatska); Orifarm, Norway
  • Reverzine (Fampridine and Yohimbine (veterinary use))
    Bayer Australia Ltd Animal Health, Australia


IUPACInternational Union of Pure and Applied Chemistry
ISInofficial Synonym
OSOfficial Synonym
Rec.INNRecommended International Nonproprietary Name (World Health Organization)
USANUnited States Adopted Name
WHOWorld Health Organization

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.