フロキサシリン 化學(xué)特性,用途語,生産方法
効能
抗生物質(zhì), 細(xì)胞壁合成阻害薬
説明
Chemically this is 3(2-chloro-6-fluorophenyl)-5-methyl-4-isoxazolyl
penicillin; this differs from dicloxacillin only by the substitution of a fluorine for a chlorine atom (Sutherland et al., 1970). It comes as oral
capsules of 250 and 500 mg, as a suspension of 25 and 50 mg/ml, and in
an injectable formulation of 500 mg and 1 g.
使用
Antibacterial.
定義
ChEBI: A penicillin compound having a 6beta-[3-(2-chloro-6-fluorophenyl)-5-methyl-1,2-oxazole-4-carboxamido] side-chain.
抗菌性
There is complete cross-resistance with other
penicillinase-stable penicillins.
一般的な説明
Flucloxacillin was synthesized by Beecham Research Laboratories in 1962 as a penicillinase-stable and orally active semisynthetic penicillin. It shows almost the same activity as dicloxacillin, and it has slightly higher serum and tissue concentrations than dicloxacillin. This drug has been used to treat pyoderma, sepsis, and postoperative infections as well as ear and nose, respiratory tract, and other infections caused by Staphylococcus and Streptococcus, including benzylpenicillin-resistant strains.
薬物動(dòng)態(tài)學(xué)
Oral absorption: c. 80%
C
max 250 mg (oral): 11 mg/L after 0.5–1 h
Plasma half-life: 2 h
Plasma protein binding: 95%
Absorption and distribution
It is well absorbed after oral administration and penetrates rapidly into extravascular exudates. Its high protein binding limits its diffusion, notably into the normal CSF.
Metabolism and excretion
Flucloxacillin is partly metabolized in the liver and about 10% of the plasma concentration is made up of metabolites. It is more slowly eliminated than cloxacillin. Some appears in the bile but about 50–80% of an oral dose is recovered from the urine, about 20% as metabolites.
臨床応用
Uses are those of group 3 penicillins.
副作用
In patients treated by intravenous infusion, about 5% developed
phlebitis by the first and 15% by the second day, after
which the proportion rose dramatically. Side effects are otherwise
those common to penicillins.
フロキサシリン 上流と下流の製品情報(bào)
原材料
準(zhǔn)備製品