性能描述

保存溫度 2-8°C

Biochem/physiol Actions
Piperacillin inhibits the final stage of bacterial cell wall biosynthesis at the level of PBP binding.
Piperacillin inhibits the last stage of bacterial cell wall synthesis by binding to certain penicillin-binding proteins (PBPs), which results in cell lysis. Cell lysis is mediated by bacterial cell wall autolytic enzymes. Piperacillin may interfere with autolysin inhibitors.

Application
Piperacillin is a semisynthetic, broad-spectrum ureidopenicillin antibiotic. It is derived from ampicillin. It has been used in pharmacokinetic studies in order to optimize antimicrobial therapy in patients with sepsis. It is used to study piperacillin hypersensitivity reactions and to study multidrug-resistant organisms.

性狀：該品為白色或類白色粉末；無臭；極易引濕。該品在水中或甲醇中極易溶解，在無水乙醇中溶解，在丙酮中不溶。

革蘭陽性菌的作用與氨芐西林相似，對腸球菌有較好的抗菌作用，對于某些擬桿菌和梭菌也有一定作用。

對革蘭陰性菌的作用強(qiáng)，抗菌譜包括淋球菌、大腸桿菌、變形桿菌、克雷白肺炎桿菌、綠膿桿菌、枸櫞酸桿菌、腸桿菌屬、嗜血桿菌等，對沙門桿菌、痢疾桿菌、除綠膿桿菌外的一些假單胞菌、腦膜炎球菌、雅森桿菌等雖也在體外有抗菌作用，但其臨床意義尚未明確。