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Details

Stereochemistry ACHIRAL
Molecular Formula C16H18FN3O3.H2O
Molecular Weight 337.3461
Optical Activity NONE
Defined Stereocenters 0 / 0
E/Z Centers 0
Charge 0

SHOW SMILES / InChI
Structure of NORFLOXACIN MONOHYDRATE

SMILES

O.CCN1C=C(C(O)=O)C(=O)C2=C1C=C(N3CCNCC3)C(F)=C2

InChI

InChIKey=ITBINNOMHXTMLQ-UHFFFAOYSA-N
InChI=1S/C16H18FN3O3.H2O/c1-2-19-9-11(16(22)23)15(21)10-7-12(17)14(8-13(10)19)20-5-3-18-4-6-20;/h7-9,18H,2-6H2,1H3,(H,22,23);1H2

HIDE SMILES / InChI

Molecular Formula C16H18FN3O3
Molecular Weight 319.3308
Charge 0
Count
Stereochemistry ACHIRAL
Additional Stereochemistry No
Defined Stereocenters 0 / 0
E/Z Centers 0
Optical Activity NONE

Molecular Formula H2O
Molecular Weight 18.0153
Charge 0
Count
Stereochemistry ACHIRAL
Additional Stereochemistry No
Defined Stereocenters 0 / 0
E/Z Centers 0
Optical Activity NONE

Description
Curator's Comment: description was created based on several sources, including https://davisplus.fadavis.com/3976/meddeck/pdf/norfloxacin.pdf

Norfloxacin is an antibacterial agent, It inhibits inhibits DNA synthesis by inhibiting DNA gyrase enzyme. Norfloxacin was approved in 1986 for treatment of urinary tract infections, gynecological infections, prostatitis, gonorhhea and bladder infections. In ophtalmology, norfloxacin is used for treatment of conjunctivitus.

CNS Activity

Curator's Comment: Has limited CNS penetration in rats. Human data unknown.

Approval Year

Targets

Targets

Primary TargetPharmacologyConditionPotency
Target ID: CHEMBL2363076
Sources: 
Conditions

Conditions

ConditionModalityTargetsHighest PhaseProduct
Curative
NOROXIN

Approved Use

Uncomplicated urinary tract infections (including cystitis) due to Enterococcus faecalis, Escherichia coli, Klebsiella pneumoniae, Proteus mirabilis, Pseudomonas aeruginosa, Staphylococcus epidermidis, Staphylococcus saprophyticus, Citrobacter freundii, Enterobacter aerogenes, Enterobacter cloacae, Proteus vulgaris, Staphylococcus aureus, or Streptococcus agalactiae. Complicated urinary tract infections due to Enterococcus faecalis, Escherichia coli, Klebsiella pneumoniae, Proteus mirabilis, Pseudomonas aeruginosa, or Serratia marcescens.

Launch Date

1986
Curative
NOROXIN

Approved Use

Uncomplicated urethral and cervical gonorrhea due to Neisseria gonorrhoeae.

Launch Date

1986
Curative
NOROXIN

Approved Use

Prostatitis due to Escherichia coli

Launch Date

1986
Curative
CHIBROXIN

Approved Use

CHIBROXIN Ophthalmic Solution is indicated for the treat­ment of conjunctivitis when caused by susceptible strains of the following bacteria: Acinetobacter calcoaceticus, Aeromonas hydrophila, Haemophilus influenzae, Proteus mirabilis, Pseudomonas aeruginosa, Serratia marcescens, Staphylococcus aureus Staphylococcus epidermidis, Staphylococcus warnerii, Streptococcus pneumoniae. Appropriate monitoring of bacterial response to topical antibiotic therapy should accompany the use of CHIBROXIN Ophthalmic Solution.

Launch Date

1991
Cmax

Cmax

ValueDoseCo-administeredAnalytePopulation
2.02 μg/mL
400 mg single, oral
dose: 400 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
NORFLOXACIN plasma
Homo sapiens
population: HEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FASTED
AUC

AUC

ValueDoseCo-administeredAnalytePopulation
9.8 μg × h/mL
400 mg single, oral
dose: 400 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
NORFLOXACIN plasma
Homo sapiens
population: HEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FASTED
T1/2

T1/2

ValueDoseCo-administeredAnalytePopulation
4 h
400 mg single, oral
dose: 400 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
NORFLOXACIN plasma
Homo sapiens
population: HEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FASTED
Funbound

Funbound

ValueDoseCo-administeredAnalytePopulation
85%
400 mg single, oral
dose: 400 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
NORFLOXACIN plasma
Homo sapiens
population: HEALTHY
age: ADULT
sex: FEMALE / MALE
food status: FASTED
Doses

Doses

DosePopulationAdverse events​
1600 mg single, oral
Studied dose
Dose: 1600 mg
Route: oral
Route: single
Dose: 1600 mg
Sources:
healthy, 24 ± 2 years
Health Status: healthy
Age Group: 24 ± 2 years
Sex: M
Sources:
400 mg 2 times / day steady, oral
Recommended
Dose: 400 mg, 2 times / day
Route: oral
Route: steady
Dose: 400 mg, 2 times / day
Sources:
unhealthy, 32 years (range: 18-96 years)
Health Status: unhealthy
Age Group: 32 years (range: 18-96 years)
Sex: M+F
Sources:
Disc. AE: Nausea, Rash...
AEs leading to
discontinuation/dose reduction:
Nausea (1 patient)
Rash (2 patients)
Sources:
400 mg 2 times / day steady, oral
Recommended
Dose: 400 mg, 2 times / day
Route: oral
Route: steady
Dose: 400 mg, 2 times / day
Sources:
unhealthy, 46.0 years
Health Status: unhealthy
Age Group: 46.0 years
Sex: M+F
Sources:
Disc. AE: Abdominal cramps...
AEs leading to
discontinuation/dose reduction:
Abdominal cramps (1 patient)
Sources:
AEs

AEs

AESignificanceDosePopulation
Nausea 1 patient
Disc. AE
400 mg 2 times / day steady, oral
Recommended
Dose: 400 mg, 2 times / day
Route: oral
Route: steady
Dose: 400 mg, 2 times / day
Sources:
unhealthy, 32 years (range: 18-96 years)
Health Status: unhealthy
Age Group: 32 years (range: 18-96 years)
Sex: M+F
Sources:
Rash 2 patients
Disc. AE
400 mg 2 times / day steady, oral
Recommended
Dose: 400 mg, 2 times / day
Route: oral
Route: steady
Dose: 400 mg, 2 times / day
Sources:
unhealthy, 32 years (range: 18-96 years)
Health Status: unhealthy
Age Group: 32 years (range: 18-96 years)
Sex: M+F
Sources:
Abdominal cramps 1 patient
Disc. AE
400 mg 2 times / day steady, oral
Recommended
Dose: 400 mg, 2 times / day
Route: oral
Route: steady
Dose: 400 mg, 2 times / day
Sources:
unhealthy, 46.0 years
Health Status: unhealthy
Age Group: 46.0 years
Sex: M+F
Sources:
Overview

Overview

CYP3A4CYP2C9CYP2D6hERG


OverviewOther

Other InhibitorOther SubstrateOther Inducer



Drug as perpetrator​Tox targets

Tox targets

TargetModalityActivityMetaboliteClinical evidence
PubMed

PubMed

TitleDatePubMed
Structure-activity relationships of antibacterial 6,7- and 7,8-disubstituted 1-alkyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acids.
1980 Dec
World-wide clinical experience with norfloxacin: efficacy and safety.
1986
Norfloxacin versus co-trimoxazole in the treatment of recurring urinary tract infections in men.
1986
Norfloxacin in the treatment of uncomplicated gonococcal infections.
1987 Jun 26
Interaction of fluoroquinolones and certain ionophores in broilers: effect on blood levels and hepatic cytochrome p450 monooxygenase activity.
2001
Resistance to antibiotics in injured coliforms isolated from drinking water.
2001
The impact of norfloxacin, ciprofloxacin and ofloxacin on human gut colonization by Candida albicans.
2001
Comparison of ofloxacin and norfloxacin concentration in prostatic tissues in patients undergoing transurethral resection of the prostate.
2001 Aug
Influence of ruminal distribution on norfloxacin pharmacokinetics in adult sheep.
2001 Aug
The fungus Pestalotiopsis guepini as a model for biotransformation of ciprofloxacin and norfloxacin.
2001 Aug
Characterization of sparfloxacin-resistant mutants of Staphylococcus aureus obtained in vitro.
2001 Aug
Multiresidue analysis of fluoroquinolone antibiotics in chicken tissue using automated microdialysis-liquid chromatography.
2001 Aug
Trace determination of fluoroquinolone antibacterial agents in urban wastewater by solid-phase extraction and liquid chromatography with fluorescence detection.
2001 Aug 1
[In vitro activity of six fluoroquinolones and penicillin against 101 viridans group streptococci characterized by their susceptibility to erythromycin].
2001 Dec
Relationship among plasmids recovered from Staphylococcus aureus, milk leukocytes, and antimicrobial resistance.
2001 Dec
Epidemiology of hospital-acquired infections in cirrhotic patients: effect of carriage of methicillin-resistant Staphylococcus aureus and influence of previous antibiotic therapy and norfloxacin prophylaxis.
2001 Dec
In vitro method for prediction of the phototoxic potentials of fluoroquinolones.
2001 Dec
[Observations of properties of the L-form of M. tuberculosis induced by the antituberculosis drugs].
2001 Jan
Interaction between biofilms formed by Staphylococcus epidermidis and quinolones.
2001 Jul
2D molecular square grid with strong blue fluorescent emission: a complex of norfloxacin with zinc(II).
2001 Jul 30
[A study on the resistance of Staphylococcus aureus and the mechanisms of its resistance to fluoroquinolone].
2001 Mar
Natural antibiotic susceptibility of recently established coryneform bacteria.
2001 May
Retrospective analysis of drug-induced urticaria and angioedema: a survey of 2287 patients.
2001 Nov
[Bilateral serous retinal detachments in acute posterior multifocal placoid pigmentous epitheliopathy].
2001 Nov
[The activity of four fluoroquinolones against strains of Pseudomonas aeruginosa with a different sensitivity pattern to ceftazidime and imipenem].
2001 Nov
Enantioselective binding of ofloxacin to B form DNA.
2001 Nov 1
New pyridoquinoline derivatives as potential inhibitors of the fluoroquinolone efflux pump in resistant Enterobacter aerogenes strains.
2001 Nov 8
Synthesis and antibacterial activity of some novel N-substituted piperazinyl-quinolones.
2001 Nov-Dec
Studies on the uptake and release of fluoroquinolones by disposable contact lenses.
2001 Oct
Trends in quinolone susceptibility of Enterobacteriaceae among inpatients of a large university hospital: 1992-98.
2001 Oct
Fluoroquinolone adverse effects and drug interactions.
2001 Oct
Plasmid-mediated dimethoate degradation in Pseudomonas aeruginosa MCMB-427.
2001 Oct
Treatment of malignant biliary stenosis: which stent to use?
2001 Oct-Dec
Comparison of aztreonam against other antibiotics used in urinary tract infections.
2001 Oct-Dec
Relationship between mutations in the DNA gyrase and topoisomerase IV genes and nadifloxacin resistance in clinically isolated quinolone-resistant Staphylococcus aureus.
2001 Sep
[Acute cystitis in women. Current microbial sensitivity in our setting].
2001 Sep
Comparative in vitro activities of five quinolone antibiotics, including gemifloxacin, against clinical isolates.
2001 Sep
Antimicrobial susceptibilities of Campylobacter strains isolated from broilers in the southern part of Japan from 1995 to 1999.
2001 Sep
[Multidrug-resistant and fluoroquinolone-resistant Salmonella enterica serotype Typhimurium definitive phage type 12 isolated from infantile diarrhea].
2001 Sep
Na+-driven multidrug efflux pump VcmA from Vibrio cholerae non-O1, a non-halophilic bacterium.
2001 Sep 25
Utilization of quinolone drugs as monomers: characterization of the synthesis reaction products for poly(norfloxacin diisocyanatododecane polycaprolactone).
2001 Spring
Ignoring pharmacokinetics may lead to isoboles misinterpretation: illustration with the norfloxacin-theophylline convulsant interaction in rats.
2002 Feb
In vitro activity of clinafloxacin in comparison with other quinolones against Stenotrophomonas maltophilia clinical isolates in the presence and absence of reserpine.
2002 Feb
Activation of phagocytic cell NADPH oxidase by norfloxacin: a potential mechanism to explain its bactericidal action.
2002 Feb
[Acute pancreatitis secondary to administration or norfloxacin].
2002 Jan
[Urinary infections without complications: comparison of a treatment with norfloxacin for 7 days versus norfloxacin for 3 days].
2002 Jan
Treatment of acute bacterial conjunctivitis with topical netilmicin.
2002 Jan
Bacterial infections in cirrhosis: epidemiological changes with invasive procedures and norfloxacin prophylaxis.
2002 Jan
Resistance of Klebsiella pneumoniae strains producing and not producing ESBL (extended-spectrum beta-lactamase) type enzymes to selected non-beta-lactam antibiotics.
2002 Mar
Rapid antimicrobial susceptibility testing of urinary tract isolates and samples by flow cytometry.
2002 Mar
Patents

Sample Use Guides

Norfloxacin tablets is administered orally with a glass of water at least 1 hour before or at least 2 hours after a meal or dairy products (e.g., milk, yogurt). Patients receiving norfloxacin should be well hydrated and should be instructed to drink fluids liberally. The maximal oral dose is 400 mg. For treatment of conjunctivitus, norfloxacin should be instilled at 1 or 2 drops to the affected eye(s) 4 times daily for up to 7 days.
Route of Administration: Other
In Vitro Use Guide
Minimal inhibition concnetration of norfloxacin aganis S.aureus, E.coli and P.aeuginosa was determined using agar media by means of a standard twofold serial dilution method and comprised 0.39, 0.05 and 0.39 ug/mL correspondingly.
Substance Class Chemical
Created
by admin
on Mon Mar 31 21:16:48 GMT 2025
Edited
by admin
on Mon Mar 31 21:16:48 GMT 2025
Record UNII
YUF620IF4G
Record Status Validated (UNII)
Record Version
  • Download
Name Type Language
NORFLOXACIN MONOHYDRATE
Common Name English
3-QUINOLINECARBOXYLIC ACID, 1-ETHYL-6-FLUORO-1,4-DIHYDRO-4-OXO-7-(1-PIPERAZINYL)-, MONOHYDRATE
Preferred Name English
NORFLOXACIN HYDRATE
Common Name English
Code System Code Type Description
PUBCHEM
19829980
Created by admin on Mon Mar 31 21:16:48 GMT 2025 , Edited by admin on Mon Mar 31 21:16:48 GMT 2025
PRIMARY
FDA UNII
YUF620IF4G
Created by admin on Mon Mar 31 21:16:48 GMT 2025 , Edited by admin on Mon Mar 31 21:16:48 GMT 2025
PRIMARY
EPA CompTox
DTXSID10197298
Created by admin on Mon Mar 31 21:16:48 GMT 2025 , Edited by admin on Mon Mar 31 21:16:48 GMT 2025
PRIMARY
CAS
478082-34-7
Created by admin on Mon Mar 31 21:16:48 GMT 2025 , Edited by admin on Mon Mar 31 21:16:48 GMT 2025
PRIMARY
Related Record Type Details
ANHYDROUS->SOLVATE