Skip to Content




ATC (Anatomical Therapeutic Chemical Classification)


CAS registry number (Chemical Abstracts Service)


Chemical Formula


Molecular Weight


Therapeutic Categories

Treatment of myasthenia gravis

Potassium channel blocker

Chemical Name

Pyridine-3,4-diamine (WHO)

Foreign Names

  • Amifampridinum (Latin)
  • Amifampridin (German)
  • Amifampridine (French)
  • Amifampridina (Spanish)

Generic Names

  • Amifampridine (OS: BAN)
  • 3,4-DAP (IS)
  • 5-22-11-00266 (IS: Beilstein)
  • BRN 0110232 (IS)
  • NSC 521760 (IS)
  • SC 10 (IS)
  • 3,4-DAP-phosphate (IS)

Brand Names

  • Firdapse
    AGEPS, Israel; BioMarin, Denmark; BioMarin Europe, Spain; Biomarin Europe-GB, Italy
  • Gainehair (Amifampridine and Minoxidil)
    Wockhardt, India
  • Hair 4 U (Amifampridine and Minoxidil)
    Glenmark, India
  • Firdapse
    BioMarin, Germany; BioMarin Europe, France; BioMarin Europe, Lithuania; BioMarin Europe, Sweden; DRAC, Switzerland
  • Fridapse
    Biomarin, Portugal


BANBritish Approved Name
ISInofficial Synonym
OSOfficial Synonym
Rec.INNRecommended International Nonproprietary Name (World Health Organization)
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.