A group of beta-lactam antibiotics from Penicillium or synthetic.

• Mainly active against gram-positive bacteria; used to treat infections.

源自青霉菌或人工合成的一类β-内酰胺类抗生素。

• 主要针对革兰氏阳性菌，用于治疗多种感染。

A preparation or dose of such an antibiotic; the specific drug.

指该类抗生素的具体制剂或一次用量。