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Ciprofloxacin

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Ciprofloxacin Basic information
Ciprofloxacin Chemical Properties
  • Melting point:255-257°C
  • Boiling point:581.8±50.0 °C(Predicted)
  • Density 1.461±0.06 g/cm3(Predicted)
  • storage temp. Store at 0-5°C
  • solubility Soluble in 0.1N HCl at 25mg/ml. Poorly soluble in DMSO
  • form powder
  • pkapKa 4.04 (Uncertain)
  • Water Solubility 86mg/L(25 ºC)
  • Merck 14,2314
  • BRN 3568352
  • CAS DataBase Reference85721-33-1(CAS DataBase Reference)
  • EPA Substance Registry SystemCiprofloxacin (85721-33-1)
Safety Information
MSDS
Ciprofloxacin Usage And Synthesis
  • DescriptionCiprofloxacin is a quinolone antibacterial related to recently marketed norfloxacin (10), ofloxacin (2), pefloxacin (2) and enoxacin. It has a broad spectrum of activity against gram-positive and gram-negative bacteria, and is useful in the treatment of urinary and upper respiratory tract infections.
  • Chemical PropertiesWhite Powder
  • OriginatorBayer (W. Germany)
  • UsesFluorinated quinolone antibacterial
  • DefinitionChEBI: A quinolone that is quinolin-4(1H)-one bearing cyclopropyl, carboxylic acid, fluoro and piperazin-1-yl substituents at positions 1, 3, 6 and 7, respectively.
  • Manufacturing ProcessCyclopropyl-6-fluoro-4-oxo-7-(1-piperazinyl)-1,4-dihydro-3-quinolinecarboxylic acid was synthesized by heating of a mixture of 7-chloro-1-cyclopropyl-6- fluoro-1,4-dihydro-4-oxo-quinolin-3-carboxylic acid and 30.1 g dry piperazine in 100 ml DMSO for 2 hours at 135-140°C. DMSO was evaporated in high vacuum. The residue was heated with 100 ml of water, and was dried over CaCl2 in vacuum. Cyclopropyl-6-fluoro-4-oxo-7-(1-piperazinyl)-1,4-dihydro-3- quinolinecarboxylic acid obtained has a temperature of decomposition 255- 257°C.
  • brand nameCipro (Bayer);CIPROBAY.
  • Therapeutic FunctionAntibiotic
  • Antimicrobial activityIt exhibits potent activity against most Enterobacteriaceae, as well as against Acinetobacter spp. (MIC 0.25–1 mg/L), fastidious Gram-negative bacilli such as Mor. catarrhalis (MIC 0.06–0.25 mg/L) and Campylobacter jejuni(MIC 0.12 mg/L). In common with other quinolones, it is active against Bacillus anthracis. Ciprofloxacin is the most active quinolone against Ps. aeruginosa and exhibits good activity in vitro against other non-fermenting Gram-negative bacilli. In-vitro activity against Staph. aureus coagulase-negative staphylococci, Str. pyogenes, Str. pneumoniae and Enterococcus spp. (MIC c. 0.5–2 mg/L) is moderate. Most methicillin-resistant strains of staphylococci are resistant. It has poor activity against anaerobes, but is active against M. tuberculosis, Mycoplasma spp. and intracellular pathogens such as Chlamydia, Chlamydophila and Legionella.
  • Pharmaceutical ApplicationsA 6-fluoro, 7-piperazinyl quinolone formulated as the hydrochloride for oral administration and as the lactate for intravenous use.
  • PharmacokineticsOral absorption: 50–80%
    Cmax 500 mg oral: 1.5–2 mg/L after 1–2 h
    200 mg intravenous (15-min infusion): 3.5 mg/L end infusion
    Plasma half-life: 3–4 h
    Volume ofdistribution: 3–4 L/kg
    Plasma protein binding: 20–40%
    Absorption
    After escalating oral doses, mean peak plasma levels increase proportionately with dose. However, accumulation occurs after repeated doses of 500 mg orally or 200 mg intravenously every 12 h: the apparent elimination half-life has been reported to rise to about 6 h after a regimen of 250 mg every 12 h for 6 days. Absorption is delayed, but seems unaffected by food and, in common with other quinolones, is reduced by certain antacids. Co-administration of sucralfate reduces the peak plasma concentrations to undetectable levels in many subjects (mean value from 2 to 0.2 mg/L) and the AUC is reduced to 12% of the value obtained when ciprofloxacin is administered alone. Ferrous sulfate and multivitamin preparations containing zinc significantly reduce absorption, which is also impaired in patients receiving cytotoxic chemotherapy for hematological malignancies. Calculated total bioavailability is 60–70%.
    Distribution
    It is widely distributed in body fluids, concentrations in most tissues and in phagocytic cells approximating those in plasma. Concentrations in the CSF, even in the presence of meningitis, are about half the simultaneous plasma levels.
    Metabolism and excretion
    It is partly metabolized to four metabolites, all but one of which (desethylciprofloxacin) display antibacterial activity. About 95% of a dose can be recovered from feces and urine. Around 40% of an oral and 75% of an intravenous dose appear in the urine over 24 h. Elimination is by both glomerular filtration and tubular secretion (60–70%) and is reduced by concurrently administered probenecid and by renal insufficiency. It is poorly removed by hemodialysis. Part of the administered drug is eliminated in the bile. An enterohepatic cycle results in prolongation of the half-life. The four metabolites are eliminated in the urine and feces at low concentration in comparison to the parent compound.
  • Side effectsUntoward reactions are uncommon, those encountered being typical of the group. Reactions severe enough to require withdrawal of treatment have occurred in <2% of patients. The most common reactions, gastrointestinal tract disturbances, have been seen in 5% of patients and rashes in about 1%. CNS disturbances typical of quinolones have been reported in 1–2% of patients. Tendinitis and tendon rupture (especially of the Achilles tendon) may occur in a small number of patients and ciprofloxacin should be avoided in patients at risk for these conditions. Potentiation of the action of theophylline and other drugs metabolized by microsomal enzymes may occur. Crystalluria and transient arthralgia have been reported.
    In volunteers, dosages of up to 750 mg produced no change in the numbers of fecal streptococci and anaerobes, but did produce a 2.5 × log10 decline in the numbers of enterobacteria, which lasted 1 week. There was no change in the susceptibility of the affected organisms and no overgrowth by resistant strains. As with other quinolones, ciprofloxacin is not recommended for use in children or in pregnant or lactating women.
    The drug should be avoided in suspected or confirmed infections caused by Str. pneumoniae. It is inferior to conventional agents and some other fluoroquinolones in the treatment of genital tract infections caused by C. trachomatis.
    Ciprofloxacin has also been shown to be effective in the treatment of patients with malignant otitis externa, catscratch disease, prevention of infection in patients undergoing biliary tract surgery, and treatment of biliary tract infections. A topical preparation for use in the treatment of ocular infections is available, but is neither more effective nor safer than established topical agents; it may be indicated for superficial eye infections caused by pathogens resistant to conventional drugs or in patients unable to tolerate standard therapeutic agents.
  • Chemical SynthesisCiprofloxacin, 1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-3-quinolincarboxylic acid (33.2.19), is synthesized in a completely analogous scheme, except that instead of using ethyl iodide in the alkylation stage, cyclopropyl bromide is used.
  • Veterinary Drugs and TreatmentsBecause of its similar spectrum of activity, ciprofloxacin could be used as an alternative to enrofloxacin when a larger oral dosage form or intravenous product is desired. But the two compounds cannot be considered equivalent because of pharmacokinetic differences (see below).
Ciprofloxacin Preparation Products And Raw materials
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