ベンジルペニシリン/ベンザチン

化学的特性

White or almost white powder.

使用

Benzathine benzylpenicillin is used as a Penicillin antibacterial.

臨床応用

Since penicillin G benzathine, N,N'-dibenzylethylenediaminedipenicillin G (Bicillin, Permapen), is the salt of a diamine,2 moles of penicillin are available from each molecule. It isvery insoluble in water, requiring about 3,000 mL to dissolve1 g. This property gives the compound great stabilityand prolonged duration of effect. At the pH of gastric juice,it is quite stable, and food intake does not interfere with itsabsorption. It is available in tablet form and in several parenteralpreparations. The activity of penicillin G benzathineis equivalent to 1,211 units/mg.Several other amines have been used to make penicillinsalts, and research is continuing on this subject. Otheramines that have been used include 2-chloroprocaine; L-Nmethyl-1,2-diphenyl-2-hydroxyethylamine (L-ephenamine);dibenzylamine; tripelennamine (Pyribenzamine); and N,N'-bis-(dehydroabietyl)ethylenediamine (hydrabamine).

安全性プロファイル

Moderately toxic by ingestion andintraperitoneal routes. Experimental reproductive effects.When heated to decomposition it emits very toxic fumesof NOx and SOx. See other penicillin entries.