シプロフロキサシン 化学特性,用途語,生産方法
外観
白色～ほとんど白色粉末～結晶
解説
シプロフロキサシン，C17H18FN3O3(331.34)．キノロン系抗菌薬．7-クロロ-1-シクロプロピル-6-フルオロ-1,4-ジヒドロ-4-オキソキノリン-3-カルボン酸をピペラジンと縮合させると得られる．分解点255～257 ℃．幅広い抗菌スペクトルをもち，抗菌力も強い．細菌のDNAジャイレースに作用してDNAの合成を阻害する．2001年，アメリカでのバイオテロリズムでは，肺炭疽(そ)症の予防と治療に使用された．
用途
シプロフロキサシンは広域抗生物質であり、グラム陰性、グラム陽性のいずれのバクテリアにも活性である。デオキシリボ核酸二本鎖の切断再結合を行う酵素であるDNAジャイレース（DNAトポイソメラーゼの一種）に結合し、DNAの複製を阻害することで抗菌作用を示す。DNAの複製が阻害されることで、バクテリアは細胞分裂ができなくなる。
効能
抗菌薬, 核酸合成阻害薬
商品名
シプロキサン (バイエル薬品)
説明
Ciprofloxacin 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.
化学的特性
White Powder
使用
Ciprofloxacin is used in the treatment of infections from
a wide range of aerobic gram-positive and aerobic gramnegative
microorganisms. It has been shown to be
effective against inhalational anthrax and reduce the incidence
or progression of disease following exposure to
aerosolized Bacillus anthracis. It is also used in select respiratory
infections, urinary tract infections, typhoid fever,
some sexually transmitted diseases, and septicemia. Infectious
diarrhea may be caused by organisms found in food or
water and transferred by person-to-person contact. This may
have a devastating effect, globally, especially in immunocompromised
individuals. Ciprofloxacin is effective against
those organisms that may contribute to infectious diarrhea,
such as Escherichia coli (enterotoxigenic strains), Campylobacter
jejuni, and select strains of Shigella; and is utilized
when antibacterial therapy is medically indicated. Ciprofloxacin
has also been utilized as a secondary agent in the
treatment of tuberculosis.
定義
ChEBI: 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.
抗菌性
It 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.
応用例（製薬）
A 6-fluoro, 7-piperazinyl quinolone formulated as the hydrochloride for oral administration and as the lactate for intravenous use.
副作用
Untoward 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.
環境運命予測
The antimicrobial action of the drug is due to inhibition of the
enzymes required for bacterial DNA function. Topoisomerase
II (DNA gyrase) and topoisomerase IV are necessary for
bacterial DNA replication, transcription, strand repair, and
recombination. Thus, ciprofloxacin cytotoxicity may be caused
by the loss of mtDNA encoded functions.
シプロフロキサシン 上流と下流の製品情報
原材料
準備製品