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In the US, Efavirenz (efavirenz systemic) is a member of the drug class NNRTIs and is used to treat HIV Infection, Nonoccupational Exposure and Occupational Exposure.

US matches:

UK matches:



ATC (Anatomical Therapeutic Chemical Classification)


CAS registry number (Chemical Abstracts Service)


Chemical Formula


Molecular Weight


Therapeutic Categories

Antiviral agent

Treatment of HIV infection

Non-nucleoside reverse transcriptase inhibitor (NNRTI)

Chemical Name

(S)-6-chloro-4-(cyclopropyletynyl)-1,4-dihydro-4-(trifluorometyl)-2H-3,1-benzoxazin-2-one (WHO, Ph. Int.)

Foreign Names

  • Efavirenzum (Latin)
  • Efavirenz (German)
  • Éfavirenz (French)
  • Efavirenz (Spanish)

Generic Names

  • Efavirenz (OS: BAN, JAN)
  • Éfavirenz (OS: DCF)
  • DMP 266 (IS: DuPont Merck)
  • L 743726 (IS: DuPont Merck)
  • Efavirenz (PH: Ph. Int. 4, USP 37)
  • Efavirenzum (PH: Ph. Int. 4)

Brand Names

  • Adco-Efavirenz
    Adcock Ingram Pharmaceuticals, South Africa
  • Adiva
    Square, Bangladesh
  • Aspen Efavirenz
    Aspen Pharmacare, South Africa
  • Atripla (Efavirenz and Emtricitabine, + Tenofovir)
    Bristol-Myers Squibb, Greece; Bristol-Myers Squibb, Iceland; Bristol-Myers Squibb, Italy; Bristol-Myers Squibb, Lithuania; Bristol-Myers Squibb, Slovenia; Bristol-Myers Squibb, Slovakia; Bristol-Myers Squibb and Gilead, Austria; Gilead, Australia; Gilead, Belgium; Gilead, Canada; Gilead, Switzerland; Gilead, Denmark; Gilead, Spain; Gilead, United Kingdom; Gilead, Ireland; Gilead, Netherlands; Gilead, Norway; Gilead, New Zealand; Gilead, Sweden; Gilead, Thailand; Gilead, United States; Gilead Science, Hong Kong; Gilead Sciences International Ltd, Israel; Haemato Pharm, Austria; MSD, Guatemala; MSD, Honduras; MSD, Nicaragua; MSD, Panama; Stendhal, Mexico
  • ATRIPLA (Efavirenz and Emtricitabine, + Tenofovir)
    Bristol-Myers Squibb, Germany; Gilead, Germany
  • Avifanz
    Beximco, Bangladesh
  • Ciplaefavir
    Biotoscana, Colombia
  • Cipla-Efavirenz
    Cipla Medpro, South Africa
  • Efamat
    Mylan, India
  • Efarvid
    Coaspharma, Colombia
  • Efatec
    Zifam India, Myanmar
  • Efavir
    Cipla, Georgia; Cipla, Lebanon; Pharmaceutical, Venezuela
  • Efavirenz HEXAL
    Hexal, Germany
  • Efavirenz Humax
    Humax Pharmaceutical, Colombia
  • Efavirenz Mylan
    Mylan, Poland; Mylan, Portugal
  • Efavirenz Teva
    ratiopharm, Germany; Teva, Denmark; Teva, Hungary; Teva, Lithuania; Teva, Netherlands; Teva Pharma, Portugal
  • Efavirenz-Mepha
    Mepha Pharma, Switzerland
  • Efcure
    Emcure, Georgia
  • Eferven
    Ranbaxy, Georgia
  • Estiva
    Hetero, Georgia; Hetero, India
  • Evirenz
    Alkem, India
  • Filginase
    Filaxis, Argentina
  • Sonke-Efavirenz
    Sonke, South Africa
  • Stocrin
    Merck Sharp & Dohme, Austria; Merck Sharp & Dohme, Australia; Merck Sharp & Dohme, Bosnia & Herzegowina; Merck Sharp & Dohme, Belgium; Merck Sharp & Dohme, Chile; Merck Sharp & Dohme, China; Merck Sharp & Dohme, Colombia; Merck Sharp & Dohme, Czech Republic; Merck Sharp & Dohme, Greece; Merck Sharp & Dohme, Hong Kong; Merck Sharp & Dohme, Croatia (Hrvatska); Merck Sharp & Dohme, Israel; Merck Sharp & Dohme, Iceland; Merck Sharp & Dohme, Japan; Merck Sharp & Dohme, Latvia; Merck Sharp & Dohme, Malaysia; Merck Sharp & Dohme, New Zealand; Merck Sharp & Dohme, Portugal; Merck Sharp & Dohme, Romania; Merck Sharp & Dohme, Serbia; Merck Sharp & Dohme, Singapore; Merck Sharp & Dohme, Slovenia; Merck Sharp & Dohme, Slovakia; Merck Sharp & Dohme, Tunisia; MSD, Argentina; MSD, Switzerland; MSD, Denmark; MSD, Netherlands; MSD, Norway; MSD, Sweden; MSD, Thailand; MSD, South Africa; MSD Pharma, Hungary; Vianex, Greece; Merck Sharp & Dohme, Lithuania
  • Stocrin MSD
    MSD, Costa Rica; MSD, Guatemala; MSD, Honduras; MSD, Nicaragua; MSD, Panama; MSD, El Salvador
  • Sulfina V
    LKM, Argentina
  • Sustiva
    Bristol Myers Squibb, Spain; Bristol-Myers Squibb, Canada; Bristol-Myers Squibb, France; Bristol-Myers Squibb, United Kingdom; Bristol-Myers Squibb, Ireland; Bristol-Myers Squibb, Italy; Bristol-Myers Squibb, Netherlands; Bristol-Myers Squibb, Portugal; Bristol-Myers Squibb, United States; Bristol-Myers Squibb, Lithuania
    Bristol-Myers Squibb, Germany
  • Teevir (Efavirenz and Tenofovir, + Emtricitabine)
    Mylan, India
  • Trustiva (Efavirenz and Tenofovir, + Emtricitabine)
    Hetero, India
  • Viraday (Efavirenz and Tenofovir, + Emtricitabine)
    Cipla, India
  • Virocomb-E (Efavirenz andLamivudine, +Zidovudine)
    Ranbaxy, Myanmar
  • Virorrever
    Richmond, Argentina
  • Virzen
    Biogen, Colombia
  • Vonavir (Efavirenz and Tenofovir, + Emtricitabine)
    Emcure, India
  • Zuletel
    Microsules Arg, Argentina

International Drug Name Search


BANBritish Approved Name
DCFDénomination Commune Française
ISInofficial Synonym
JANJapanese Accepted Name
OSOfficial Synonym
PHPharmacopoeia Name
Rec.INNRecommended International Nonproprietary Name (World Health Organization)

Click for further information on drug naming conventions and 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.