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Details

Stereochemistry RACEMIC
Molecular Formula C14H9ClF3NO2
Molecular Weight 315.675
Optical Activity ( + / - )
Defined Stereocenters 0 / 1
E/Z Centers 0
Charge 0

SHOW SMILES / InChI
Structure of Rac-Efavirenz

SMILES

FC(F)(F)C1(OC(=O)NC2=CC=C(Cl)C=C12)C#CC3CC3

InChI

InChIKey=XPOQHMRABVBWPR-UHFFFAOYSA-N
InChI=1S/C14H9ClF3NO2/c15-9-3-4-11-10(7-9)13(14(16,17)18,21-12(20)19-11)6-5-8-1-2-8/h3-4,7-8H,1-2H2,(H,19,20)

HIDE SMILES / InChI

Molecular Formula C14H9ClF3NO2
Molecular Weight 315.675
Charge 0
Count
Stereochemistry RACEMIC
Additional Stereochemistry No
Defined Stereocenters 0 / 1
E/Z Centers 0
Optical Activity ( + / - )

Description
Curator's Comment: Description was created based on several sources, including

Efavirenz (brand names Sustiva® and Stocrin®) is a non-nucleoside reverse transcriptase inhibitor (NNRTI) and is used as part of highly active antiretroviral therapy (HAART) for the treatment of a human immunodeficiency virus (HIV) type 1. For HIV infection that has not previously been treated, efavirenz and lamivudine in combination with zidovudine or tenofovir is the preferred NNRTI-based regimen. Efavirenz is also used in combination with other antiretroviral agents as part of an expanded postexposure prophylaxis regimen to prevent HIV transmission for those exposed to materials associated with a high risk for HIV transmission.

Originator

Curator's Comment: # Merck & Co

Approval Year

Targets

Targets

Primary TargetPharmacologyConditionPotency
4.0 nM [EC50]
26.1 µM [IC50]
52.0 µM [IC50]
20.0 nM [EC50]
Conditions

Conditions

ConditionModalityTargetsHighest PhaseProduct
Primary
SUSTIVA

Approved Use

SUSTIVA is a non-nucleoside reverse transcriptase inhibitor indicated in combination with other antiretroviral agents for the treatment of human immunodeficiency virus type 1 infection.

Launch Date

1998
Cmax

Cmax

ValueDoseCo-administeredAnalytePopulation
1.6 μM
100 mg single, oral
dose: 100 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
EFAVIRENZ plasma
Homo sapiens
population: HEALTHY
age: ADULT
sex: UNKNOWN
food status: UNKNOWN
9.1 μM
1600 mg single, oral
dose: 1600 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
EFAVIRENZ plasma
Homo sapiens
population: HEALTHY
age: ADULT
sex: UNKNOWN
food status: UNKNOWN
12.9 μM
600 mg 1 times / day steady-state, oral
dose: 600 mg
route of administration: Oral
experiment type: STEADY-STATE
co-administered:
EFAVIRENZ plasma
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: UNKNOWN
food status: UNKNOWN
AUC

AUC

ValueDoseCo-administeredAnalytePopulation
184 μM × h
600 mg 1 times / day steady-state, oral
dose: 600 mg
route of administration: Oral
experiment type: STEADY-STATE
co-administered:
EFAVIRENZ plasma
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: UNKNOWN
food status: UNKNOWN
T1/2

T1/2

ValueDoseCo-administeredAnalytePopulation
40 h
600 mg 1 times / day steady-state, oral
dose: 600 mg
route of administration: Oral
experiment type: STEADY-STATE
co-administered:
EFAVIRENZ plasma
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: UNKNOWN
food status: UNKNOWN
Funbound

Funbound

ValueDoseCo-administeredAnalytePopulation
0.5%
600 mg 1 times / day steady-state, oral
dose: 600 mg
route of administration: Oral
experiment type: STEADY-STATE
co-administered:
EFAVIRENZ plasma
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: UNKNOWN
food status: UNKNOWN
Doses

Doses

DosePopulationAdverse events​
3 g single, oral
Overdose
Dose: 3 g
Route: oral
Route: single
Dose: 3 g
Sources:
unhealthy, 12 years
Health Status: unhealthy
Age Group: 12 years
Sex: M
Sources:
600 mg 1 times / day multiple, oral
Recommended
Dose: 600 mg, 1 times / day
Route: oral
Route: multiple
Dose: 600 mg, 1 times / day
Sources:
unhealthy, 33 years
Health Status: unhealthy
Age Group: 33 years
Sex: F
Sources:
Disc. AE: Mania...
AEs leading to
discontinuation/dose reduction:
Mania (1 patient)
Sources:
25 mg/kg 1 times / day steady, oral
Highest studied dose
Dose: 25 mg/kg, 1 times / day
Route: oral
Route: steady
Dose: 25 mg/kg, 1 times / day
Sources:
unhealthy, 33.9 months (range: 29.2–40.2 months)
Health Status: unhealthy
Age Group: 33.9 months (range: 29.2–40.2 months)
Sex: M+F
Sources:
800 mg 1 times / day steady, oral
Highest studied dose
Dose: 800 mg, 1 times / day
Route: oral
Route: steady
Dose: 800 mg, 1 times / day
Sources:
unhealthy, 37.3 years
Health Status: unhealthy
Age Group: 37.3 years
Sex: M+F
Sources:
Disc. AE: Hallucination, Dizziness...
AEs leading to
discontinuation/dose reduction:
Hallucination (1 patient)
Dizziness (1 patient)
Insomnia (1 patient)
Hepatotoxicity (1 patient)
Skin rash (1 patient)
Pruritus (1 patient)
Rash (1 patient)
Sources:
AEs

AEs

AESignificanceDosePopulation
Mania 1 patient
Disc. AE
600 mg 1 times / day multiple, oral
Recommended
Dose: 600 mg, 1 times / day
Route: oral
Route: multiple
Dose: 600 mg, 1 times / day
Sources:
unhealthy, 33 years
Health Status: unhealthy
Age Group: 33 years
Sex: F
Sources:
Dizziness 1 patient
Disc. AE
800 mg 1 times / day steady, oral
Highest studied dose
Dose: 800 mg, 1 times / day
Route: oral
Route: steady
Dose: 800 mg, 1 times / day
Sources:
unhealthy, 37.3 years
Health Status: unhealthy
Age Group: 37.3 years
Sex: M+F
Sources:
Hallucination 1 patient
Disc. AE
800 mg 1 times / day steady, oral
Highest studied dose
Dose: 800 mg, 1 times / day
Route: oral
Route: steady
Dose: 800 mg, 1 times / day
Sources:
unhealthy, 37.3 years
Health Status: unhealthy
Age Group: 37.3 years
Sex: M+F
Sources:
Hepatotoxicity 1 patient
Disc. AE
800 mg 1 times / day steady, oral
Highest studied dose
Dose: 800 mg, 1 times / day
Route: oral
Route: steady
Dose: 800 mg, 1 times / day
Sources:
unhealthy, 37.3 years
Health Status: unhealthy
Age Group: 37.3 years
Sex: M+F
Sources:
Insomnia 1 patient
Disc. AE
800 mg 1 times / day steady, oral
Highest studied dose
Dose: 800 mg, 1 times / day
Route: oral
Route: steady
Dose: 800 mg, 1 times / day
Sources:
unhealthy, 37.3 years
Health Status: unhealthy
Age Group: 37.3 years
Sex: M+F
Sources:
Pruritus 1 patient
Disc. AE
800 mg 1 times / day steady, oral
Highest studied dose
Dose: 800 mg, 1 times / day
Route: oral
Route: steady
Dose: 800 mg, 1 times / day
Sources:
unhealthy, 37.3 years
Health Status: unhealthy
Age Group: 37.3 years
Sex: M+F
Sources:
Rash 1 patient
Disc. AE
800 mg 1 times / day steady, oral
Highest studied dose
Dose: 800 mg, 1 times / day
Route: oral
Route: steady
Dose: 800 mg, 1 times / day
Sources:
unhealthy, 37.3 years
Health Status: unhealthy
Age Group: 37.3 years
Sex: M+F
Sources:
Skin rash 1 patient
Disc. AE
800 mg 1 times / day steady, oral
Highest studied dose
Dose: 800 mg, 1 times / day
Route: oral
Route: steady
Dose: 800 mg, 1 times / day
Sources:
unhealthy, 37.3 years
Health Status: unhealthy
Age Group: 37.3 years
Sex: M+F
Sources:
OverviewDrug as perpetrator​

Drug as perpetrator​

TargetModalityActivityMetaboliteClinical evidence
likely
no
no
no
no
yes [IC50 1 uM]
yes [IC50 10 uM]
yes [IC50 10 uM]
yes [IC50 13 uM]
yes [IC50 160 uM]
yes [IC50 17 uM]
yes [IC50 2.3 uM]
yes [IC50 250 uM]
yes [IC50 3.85 uM]
yes [IC50 31.5 uM]
yes [IC50 33.3 uM]
yes [IC50 390 uM]
yes [IC50 4.9 uM]
yes [IC50 5.66 uM]
yes [IC50 6 uM]
yes [IC50 8.5 uM]
yes [Ki 82 uM]
yes
yes
yes
yes
yes
yes (co-administration study)
Comment: Efavirenz decreased Raltegravir AUCinf by 14% and Cmax by 9%.
Drug as victim

Drug as victim

TargetModalityActivityMetaboliteClinical evidence
major
major
minor
minor
no
no
no
no
no
no
no
no
no
yes [Km 22.7 uM]
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
PubMed

PubMed

TitleDatePubMed
The stereoselective targeting of a specific enzyme-substrate complex is the molecular mechanism for the synergic inhibition of HIV-1 reverse transcriptase by (R)-(-)-PPO464: a novel generation of nonnucleoside inhibitors.
2001-11-30
Other issues: penetration into sanctuary sites, immune reconstitution and NNRTI sequencing.
2001-11
Factors affecting adherence and convenience in antiretroviral therapy.
2001-11
Comparison of NNRTIs in antiretroviral-experienced patients.
2001-11
Comparison of NNRTIs in antiretroviral-naïve patients.
2001-11
The role of NNRTIs in antiretroviral combination therapy: an introduction.
2001-11
New developments in anti-HIV chemotherapy.
2001-11
Protease-sparing regimen in a real-life practice with naïve patients: an equal opportunity approach?
2001-10-09
Efavirenz-induced psychosis.
2001-09-28
Response to first protease inhibitor- and efavirenz-containing antiretroviral combination therapy. The Swiss HIV Cohort Study.
2001-09-28
Structural mechanisms of drug resistance for mutations at codons 181 and 188 in HIV-1 reverse transcriptase and the improved resilience of second generation non-nucleoside inhibitors.
2001-09-28
Comparison of initial combination antiretroviral therapy with a single protease inhibitor, ritonavir and saquinavir, or efavirenz.
2001-09-07
Evolution of anti-HIV drug candidates. Part 3: Diarylpyrimidine (DAPY) analogues.
2001-09-03
Thiosugars. VIII. Preparation of new 4'-thio-L-lyxo pyrimidine nucleoside analogues.
2001-09
Mismatched double-stranded RNA (polyI-polyC(12)U) is synergistic with multiple anti-HIV drugs and is active against drug-sensitive and drug-resistant HIV-1 in vitro.
2001-09
Solution structures and reactivities of the mixed aggregates derived from n-butyllithium and vicinal amino alkoxides.
2001-08-22
Non-nucleoside reverse transcriptase inhibitor failure impairs HIV-RNA responses to efavirenz-containing salvage antiretroviral therapy.
2001-08-17
Efavirenz as a substitute for protease inhibitors in HIV-1-infected patients with undetectable plasma viral load on HAART: a median follow-up of 64 weeks.
2001-08-15
Antiretroviral therapy for previously treated patients.
2001-08-09
Nelfinavir, efavirenz, or both after the failure of nucleoside treatment of HIV infection.
2001-08-09
[Apropos of atypical melancholia with Sustiva (efavirenz)].
2001-08-08
Eruptive cheilitis: a new adverse effect in reactive HIV-positive patients subjected to high activity antiretroviral therapy (HAART). Presentation of six clinical cases.
2001-08-08
Metformin in an HIV-infected patient with protease inhibitor-induced diabetic ketoacidosis.
2001-08-04
Structure-based design, synthesis, and biological evaluation of conformationally restricted novel 2-alkylthio-6-[1-(2,6-difluorophenyl)alkyl]-3,4-dihydro-5-alkylpyrimidin-4(3H)-ones as non-nucleoside inhibitors of HIV-1 reverse transcriptase.
2001-08-02
Preliminary data of a prospective study on neuropsychiatric side effects after initiation of efavirenz.
2001-08-01
Antiretroviral rounds. When success is a pain.
2001-08
Antiretrovirals: simultaneous determination of five protease inhibitors and three nonnucleoside transcriptase inhibitors in human plasma by a rapid high-performance liquid chromatography--mass spectrometry assay.
2001-08
Antiviral drugs: current state of the art.
2001-08
[Drug interactions with antiretroviral agents].
2001-07-31
Gynecomastia without lipodystrophy syndrome in HIV-infected men treated with efavirenz.
2001-07-27
Synthesis and evaluation of novel quinolinones as HIV-1 reverse transcriptase inhibitors.
2001-07-23
Manic syndrome associated with efavirenz overdose.
2001-07-15
Management of sudden psychiatric disorders related to efavirenz.
2001-07-06
The steady-state pharmacokinetics of efavirenz and nevirapine when used in combination in human immunodeficiency virus type 1-infected persons.
2001-07-01
Predictors of protease inhibitor-associated adverse events.
2001-07
Efavirenz plasma concentrations and efficiency.
2001-06-15
Phenotypic hypersusceptibility to non-nucleoside reverse transcriptase inhibitors in treatment-experienced HIV-infected patients: impact on virological response to efavirenz-based therapy.
2001-06-15
Use of MM-PBSA in reproducing the binding free energies to HIV-1 RT of TIBO derivatives and predicting the binding mode to HIV-1 RT of efavirenz by docking and MM-PBSA.
2001-06-06
In vitro anti-HIV-1 synergy between non-nucleoside reverse transcriptase inhibitors nevirapine and efavirenz.
2001-06
Limits of deep salvage antiretroviral therapy with nelfinavir plus either efavirenz or nevirapine, in highly pre-treated patients with HIV disease.
2001-06
[Vertical trasmission of human immunodeficiency virus (HIV) and other sexually transmitted infections (STI)].
2001-06
Efavirenz-induced photoallergic dermatitis in HIV.
2001-05-25
High-performance liquid chromatographic method for the determination of HIV-1 non-nucleoside reverse transcriptase inhibitor efavirenz in plasma of patients during highly active antiretroviral therapy.
2001-05-05
Efavirenz-induced acute eosinophilic hepatitis.
2001-05
High prevalence of genotypic and phenotypic HIV-1 drug-resistant strains among patients receiving antiretroviral therapy in Abidjan, Côte d'Ivoire.
2001-04-15
A pilot study of the use of mycophenolate mofetil as a component of therapy for multidrug-resistant HIV-1 infection.
2001-04-15
Quinoxalinylethylpyridylthioureas (QXPTs) as potent non-nucleoside HIV-1 reverse transcriptase (RT) inhibitors. Further SAR studies and identification of a novel orally bioavailable hydrazine-based antiviral agent.
2001-02-01
Switching from protease inhibitors to the non-nuke efavirenz.
2001
Antiretroviral therapy in pregnancy: a focus on safety.
2001
A single amino acid change at Leu-188 in the reverse transcriptase of HIV-2 and SIV renders them sensitive to non-nucleoside reverse transcriptase inhibitors.
2001
Patents

Sample Use Guides

SUSTIVA should be taken orally once daily on an empty stomach, preferably at bedtime. • Recommended adult dose: 600 mg. • With voriconazole, increase voriconazole maintenance dose to 400 mg every 12 hours and decrease SUSTIVA dose to 300 mg once daily using the capsule formulation.
Route of Administration: Oral
10 pM efavirenz completely inhibited 0.5 U HIV RT.
Substance Class Chemical
Created
by admin
on Wed Apr 02 17:39:54 GMT 2025
Edited
by admin
on Wed Apr 02 17:39:54 GMT 2025
Record UNII
YXP9JDK7R7
Record Status Validated (UNII)
Record Version
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Name Type Language
Rac-Efavirenz
Common Name English
L-741211
Preferred Name English
2H-3,1-Benzoxazin-2-one, 6-chloro-4-(cyclopropylethynyl)-1,4-dihydro-4-(trifluoromethyl)-
Systematic Name English
2H-3,1-Benzoxazin-2-one, 6-chloro-4-(2-cyclopropylethynyl)-1,4-dihydro-4-(trifluoromethyl)-
Systematic Name English
(±)-Efavirenz
Common Name English
Efavirenz Racemic
Common Name English
6-Chloro-4-(2-cyclopropylethynyl)-1,4-dihydro-4-(trifluoromethyl)-2H-3,1-benzoxazin-2-one
Systematic Name English
Code System Code Type Description
FDA UNII
YXP9JDK7R7
Created by admin on Wed Apr 02 17:39:54 GMT 2025 , Edited by admin on Wed Apr 02 17:39:54 GMT 2025
PRIMARY
EPA CompTox
DTXSID00861416
Created by admin on Wed Apr 02 17:39:54 GMT 2025 , Edited by admin on Wed Apr 02 17:39:54 GMT 2025
PRIMARY
CAS
177530-93-7
Created by admin on Wed Apr 02 17:39:54 GMT 2025 , Edited by admin on Wed Apr 02 17:39:54 GMT 2025
PRIMARY
PUBCHEM
3203
Created by admin on Wed Apr 02 17:39:54 GMT 2025 , Edited by admin on Wed Apr 02 17:39:54 GMT 2025
PRIMARY