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In the US, Ethosuximide (ethosuximide systemic) is a member of the drug class succinimide anticonvulsants and is used to treat Seizures.

US matches:

UK matches:



ATC (Anatomical Therapeutic Chemical Classification)


CAS registry number (Chemical Abstracts Service)


Chemical Formula


Molecular Weight


Therapeutic Category

Antiepileptic agent

Chemical Name

2,5-Pyrrolidinedione, 3-etyl-3-metyl-

Foreign Names

  • Ethosuximidum (Latin)
  • Ethosuximid (German)
  • Ethosuximide (French)
  • Etosuximida (Spanish)

Generic Names

  • Ethosuximide (OS: USAN, BAN, JAN)
  • Éthosuximide (OS: DCF)
  • Etosuccimide (OS: DCIT)
  • Atysmal (IS)
  • Mesentol (IS)
  • Pemal (IS)
  • Suxin (IS)
  • Thilopemal (IS)
  • Ethosuximid (PH: Ph. Eur. 9.4)
  • Ethosuximide (PH: BP 2018, JP XVII, Ph. Eur. 9.4, Ph. Int. 7, USP 41)
  • Ethosuximidum (PH: Ph. Eur. 9.4, Ph. Int. 7)

Brand Names

  • Emeside
    Central Procurement & Supplies Unit, Malta; Chermidex Pharma, Cyprus
  • Epileo Petit Mal 50%
    Eisai, Japan
  • Ethosuximide
    Akorn Animal Health, United States; Bionpharma, United States; Heritage, United States; Mikart, United States; Pharmaceutical Associates, United States; Teva, United States
  • Ethosuximide Aristo
    Aristo, United Kingdom
  • Ethosuximide Chemidex
    Chemidex Pharma, Cyprus
  • Ethosuximide-Sine
    Sine Pharmaceutical, China
  • Ethosuximid-neuraxpharm
    neuraxpharm Arzneimittel, Germany
  • Ethoxa
    Delta Pharma, Egypt
  • Ethymal
    Apotex Nederland, Netherlands; Central Procurement & Supplies Unit, Malta
  • Etosuximida Faes
    Faes, Spain
  • Etoxin
    Apsen, Brazil
  • Fluozoid
    Valdecasas, Mexico
  • Petimid
    Osel, Turkey
  • Petinimid
    G.L. Pharma, Austria; G.L. Pharma, Bulgaria; G.L. Pharma, Czech Republic; G.L. Pharma, Poland; G.L.Pharma GmbH, Slovakia; Inresa, France; Lannacher, Romania
  • Petinimid 250mg
    Axapharm, Switzerland
  • Petnidan
    Desitin, Germany; Desitin, Lithuania; Desitin Pharma, Slovakia
  • Suxilep
    mibe, Germany
  • Suxinutin
    Essential Pharmaceuticals, Sweden; Famar Orleans, Serbia
  • Zarondan
    Essential Pharma, Denmark
  • Zarontin
    Clinect, Australia; Clinect, New Zealand; Elea, Argentina; ERFA Canada, Canada; Essential Pharma Ltd, France; IFET, Greece; Parke Davis, United States; Pfizer, Belgium; Pfizer, Egypt; Pfizer, Spain; Pfizer, Kuwait; Pfizer, Uruguay; Pfizer, South Africa; Pfizer Italia, Italy
  • Zarontin 250mg/5ml
    Pfizer, Luxembourg
  • Zarontin 5%
    Daiichi Sankyo, Japan


BANBritish Approved Name
DCFDénomination Commune Française
DCITDenominazione Comune Italiana
ISInofficial Synonym
JANJapanese Accepted Name
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.