Country: Malasía
Tungumál: enska
Heimild: NPRA (National Pharmaceutical Regulatory Agency, Bahagian Regulatori Farmasi Negara)
ENROFLOXACIN
Vemedim Sdn Bhd
ENROFLOXACIN
1 L
VEMEDIM VETERINARY DRUGS AND PROBIOTICS CO., LTD (VEMEDIM ANIMAL HEALTH)
Vimenro 20%w/v _Oral Solution_ COMPOSITION: Each ml contains: Enrofloxacin….…………………..…… 200 mg With Benzyl Alcohol 1% v/v as a preservative Exp. Qs …………………….………………1 ml DESCRIPTION The finished product is yellowish to yellow transparent solution PHARMACODYNAMICS MODE OF ACTION Two enzymes essential in DNA replication and transcription, DNA gyrase and topoisomerase IV, have been identified as the molecular targets of fluoroquinolones. They modulate the topological state of DNA through cleaving and resealing reactions. Initially, both strands of the DNA double helix are cleaved. Then, a distant segment of DNA is passed through this break before the strands are resealed. Target inhibition is caused by non-covalent binding of fluroquinolone molecules to an intermediate state in this sequence of reactions, in which DNA is cleaved, but both strands are retained covalently attached to the enzymes. Replication forks and translational complexes cannot proceed beyond such enzyme-DNA-fluroquinolone complexes, and inhibition of DNA and mRNA synthesis triggers events resulting in a rapid, drug concentration-dependant killing of pathogenic bacteria. ANTIBACTERIAL SPECTRUM Enrofloxacin is active against many Gram-negative bacteria, against Gram-positive bacteria and _Mycoplasma_ spp. _In vitro _susceptibility has been shown in strains of (i) Gram- negative species such as, _Pasteurella _ _multocida_ and _Avibacterium _ _(Haemophilus) _ _paragallinarum_ and (ii) _Mycoplasma gallisepticum_ and_ Mycoplasma synoviae_. TYPES AND MECHANISMS OF RESISTANCE Resistance to fluoroquinolones has been reported to arise from five sources, (i) point mutations in the genes encoding for DNA gyrase and/or topoisomerase IV leading to alterations of the respective enzyme, (ii) alterations of drug permeability in Gram-negative bacteria, (iii) efflux mechanisms, (iv) plasmid mediated resistance and (v) gyrase protecting proteins. All mechanisms lead to a reduced susceptibility of the bacteria to fluoroqu Lestu allt skjalið