Norfloxacin¿¡ ´ëÇÑ Mechanism_Of_Action Á¤º¸ The bactericidal action of Norfloxacin results from inhibition of the enzymes topoisomerase II (DNA gyrase) and topoisomerase IV, which are required for bacterial DNA replication, transcription, repair, and recombination. Norfloxacin is a broad-spectrum antibiotic that is active against both gram-positive and gram-negative bacterias. The fluorine atom at the 6 position increases potency against gram-negative organisms, and the piperazine moiety at the 7 position is responsible for anti-pseudomonal activity
Pharmacology
Norfloxacin¿¡ ´ëÇÑ Pharmacology Á¤º¸ Norfloxacin is a quinolone/fluoroquinolone antibiotic. Norfloxacin is bactericidal and its mode of action depends on blocking of bacterial DNA replication by binding itself to an enzyme called DNA gyrase, which allows the untwisting required to replicate one DNA double helix into two. Notably the drug has 100 times higher affinity for bacterial DNA gyrase than for mammalian.
Norfloxacin¿¡ ´ëÇÑ ´Ü¹é°áÇÕ Á¤º¸ 10 and 15% (Serum protein binding)
Half-life
Norfloxacin¿¡ ´ëÇÑ ¹Ý°¨±â Á¤º¸ 3-4 hours
Absorption
Norfloxacin¿¡ ´ëÇÑ Absorption Á¤º¸ Rapid
Pharmacokinetics
NorfloxacinÀÇ ¾à¹°µ¿·ÂÇÐÀÚ·á
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¼Ò½Ç : ½Å¹è¼³ ¹× º¯¹è¼³ (30%)
Biotransformation
Norfloxacin¿¡ ´ëÇÑ Biotransformation Á¤º¸ Via liver and kidney
Drug Interactions
Norfloxacin¿¡ ´ëÇÑ Drug_Interactions Á¤º¸ Aluminium Formation of non-absorbable complexesBismuth Formation of non-absorbable complexesCalcium Formation of non-absorbable complexesMagnesium oxide Formation of non-absorbable complexesMagnesium Formation of non-absorbable complexesIron Formation of non-absorbable complexesZinc Formation of non-absorbable complexesSucralfate Formation of non-absorbable complexesTheophylline The quinolone increases the effect of theophyllineOxtriphylline The quinolone increases the effect of theophyllineAminophylline The quinolone increases the effect of theophyllineDyphylline The quinolone increases the effect of theophyllineAnisindione The quinolone increases the anticoagulant effectAcenocoumarol The quinolone increases the anticoagulant effectDicumarol The quinolone increases the anticoagulant effectWarfarin The quinolone increases the anticoagulant effectCaffeine The quinolone increases the effect and toxicity of caffeineCyclosporine The quinolone increases the effect and toxicity of cyclosporineClozapine Ciprofloxacin may increase clozapine serum levelsFoscarnet Increased risk of convulsions
Norfloxacin¿¡ ´ëÇÑ Description Á¤º¸ A synthetic fluoroquinolone (fluoroquinolones) with broad-spectrum antibacterial activity against most gram-negative and gram-positive bacteria. Norfloxacin inhibits bacterial DNA gyrase. [PubChem]
The database contains the following fields: The generic name of each chemical For module A10 (liver enzyme composite module): Overall activity category for each compound (A for active, M for marginally active, or I for inactive) based on the number of active and marginally active scores for each compound at the five individual endpoints (see research article for full description of method) Number of endpoints at which each compound is marginally active (M) Number of endpoints at which each compound is active (A) For modules A11 to A15 (alkaline phosphatase increased, SGOT increased, SGPT increased, LDH increased, and GGT increased, respectively): Overall activity category for each compound (A for active, M for marginally active, or I for inactive) based on the RI and ADR values (see the research article for full description of method) Number of ADR reports for each compound, given as <4 or ¡Ã4 Reporting Index value for each compound, except where no shipping units were available (NSU) Group 1 comprises of compounds for which ADR data were available for the first five years of marketing, so when no ADR reports were listed during this period the compounds were evaluated as inactive. Group 2 comprises of compounds for which a 'steady state' period of ADR data were available (1992-1996). In cases where no ADR reports were filed during this period, the compounds were scored as 'NA' (data not available) since they may have had one or more ADR reports during their first five years of marketing which should not be negated by a lack of ADR reports during the steady-state period. NORFLOXACIN [GGT Increase] [Composite Activity] (Score)A (Marginal) 2 (Active) 2