メチシリンナトリウム

Methicillin was synthesized independently by Bristol-Myers Laboratories and Beecham Research Laboratories in 1960. It was the first member of the penicillinase-stable semisynthetic penicillin class of antibiotics to be introduced clinically. This antibiotic is a parenteral penicillin having an antibacterial spectrum similar to that of benzylpenicillin. Although its activity against benzylpenicillin-sensitive bacteria is about 1/3 to 1/50 that of benzylpenicillin, it shows strong activity against benzylpenicillinresistant strains because of its stability toward penicillinase. Methicillin has been used for therapy of respiratory tract and urinary tract infections, sepsis, and gynecological and other infections caused by benzylpenicillin-resistant bacteria.