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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 38)
  • Efavirenzum (PH: Ph. Int. 4)

Brand Names

  • Adco-Efavirenz
    Adcock Ingram Pharmaceuticals, South Africa
  • Adiva
    Square, Bangladesh
  • Arrow-Efavirenz
    Arrow Pharma, South Africa
  • Aspen-Efavirenz
    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, Poland; Bristol-Myers Squibb, United States; Bristol-Myers Squibb and Gilead Sciences, Austria; Gador, Chile; Gilead, Australia; Gilead, Belgium; Gilead, Canada; Gilead, Switzerland; Gilead, Denmark; Gilead, Spain; Gilead, Finland; Gilead, France; Gilead, Ireland; Gilead, Macedonia; Gilead, Norway; Gilead, New Zealand; Gilead, Sweden; Gilead, Thailand; Gilead, United States; Gilead Sciences, United Kingdom; Gilead Sciences, Hong Kong; Gilead Sciences International Ltd, Israel; Haemato Pharm, Austria; MSD, Guatemala; MSD, Honduras; MSD, Nicaragua; MSD, Panama; MSD, South Africa; Stendhal, Mexico
  • ATRIPLA (Efavirenz and Emtricitabine, + Tenofovir)
    Bristol-Myers Squibb, Germany; Gilead, Germany
  • Atroiza (Efavirenz and Emtricitabine, Tenofovir)
    Mylan, South Africa
  • Avifanz
    Beximco, Bangladesh
  • Cipla-Efavirenz
    Cipla Medpro, South Africa
  • Citenvir (Efavirenz and Emtricitabine, Tenofovir)
    Novagen, South Africa
  • Efamat
    Mylan, India; Mylan, Thailand
  • Efatec
    Zifam India, Myanmar
  • Efavir
    Cipla, Georgia; Cipla, Lebanon; Pharmaceutical, Venezuela
  • Efavirenz Alpha-Medical
    Alpha-Medical, Croatia (Hrvatska)
  • Efavirenz Aurobindo
    Aurobindo, Malta; Aurobindo, Netherlands
  • Efavirenz hetero
    Hetero, Netherlands
  • Efavirenz HEXAL
    Hexal, Germany
  • Efavirenz Humax
    Humax Pharmaceutical, Colombia
  • Efavirenz Mylan
    Mylan, Belgium; Mylan, Spain; Mylan, France; Mylan, Italy; Mylan, Netherlands; Mylan, Poland
  • Efavirenz Sandoz
    Sandoz, Belgium; Sandoz, Estonia; Sandoz, France; Sandoz, Italy; Sandoz, Malta; Sandoz, Netherlands; Sandoz Farmaceutica, Spain
  • Efavirenz Teva
    ratiopharm, Germany; sanofi-aventis, Croatia (Hrvatska); Teva, Denmark; Teva, Spain; Teva, Hungary; Teva, Lithuania; Teva, Sweden; Teva, Slovenia; Teva Italia, Italy; Teva Pharmaceuticals, Poland
  • Efavirenz Winthrop
    Winthrop, South Africa
  • Efavirenz Zentiva
    Zentiva, Netherlands
  • Efavirenz-Mepha
    Mepha Pharma, Switzerland
  • Efcure
    Emcure, Georgia
  • Eferven
    Ranbaxy, Georgia
  • Eflaten (Efavirenz and Tenofovir, Lamivudine)
    Mylan, South Africa
  • Efrin
    Mylan, South Africa
  • Erige
    Aurobindo, South Africa
  • Estiva
    Hetero, Georgia; Hetero, India; Hetero, Thailand
  • Evirenz
    Alkem, India
  • Filginase
    Filaxis, Argentina
  • Oditec (Efavirenz and Tenofovir, + Emtricitabine)
    Zifam India, Myanmar
  • Sonke Efavirenz
    Sonke, South Africa
  • Sonke-Efavirenz
    Sonke, South Africa
  • Stocrin
    Farmagon, Norway; Haemato Pharm, Austria; Merck Sharp & Dohme, Austria; Merck Sharp & Dohme, Australia; Merck Sharp & Dohme, Bosnia & Herzegowina; Merck Sharp & Dohme, Chile; 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, Latvia; Merck Sharp & Dohme, Malaysia; Merck Sharp & Dohme, New Zealand; Merck Sharp & Dohme, Poland; Merck Sharp & Dohme, Portugal; Merck Sharp & Dohme, Romania; Merck Sharp & Dohme, Serbia; Merck Sharp & Dohme, Slovakia; Merck Sharp & Dohme, Tunisia; MSD, Argentina; MSD, Switzerland; MSD, China; MSD, Denmark; MSD, Finland; MSD, Japan; MSD, Netherlands; MSD, Norway; MSD, Sweden; MSD, Thailand; MSD, South Africa; MSD Belgium, Belgium; MSD Pharma, Hungary; Orifarm, Norway; 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, Germany; Bristol-Myers Squibb, France; Bristol-Myers Squibb, Ireland; Bristol-Myers Squibb, Italy; Bristol-Myers Squibb, Lithuania; Bristol-Myers Squibb, Netherlands; Bristol-Myers Squibb, Poland; Bristol-Myers Squibb, Portugal; Bristol-Myers Squibb, United States; Bristol-Myers Squibb Pharmaceutical, United Kingdom
    Bristol-Myers Squibb, Germany
  • Teevir (Efavirenz and Tenofovir, + Emtricitabine)
    Mylan, India; Mylan, Thailand
  • Teva-Efavirenz
    Teva Canada, Canada
  • Trustiva (Efavirenz and Tenofovir, + Emtricitabine)
    Hetero, India
  • Viraday (Efavirenz and Tenofovir, + Emtricitabine)
    Cipla, India
  • Virorrever
    Richmond, Argentina
  • Vonavir (Efavirenz and Tenofovir, + Emtricitabine)
    Emcure, India
  • Zuletel
    Microsules Arg, Argentina


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

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