<unk>  is a narrow-spectrum β-lactam antibiotic of the penicillin class. It is used to treat infections caused by susceptible (non-resistant) Gram-positive bacteria. It is active against beta-lactamase-producing organisms such as Staphylococcus aureus, which would otherwise be resistant to most penicillins.<unk>  is available under a variety of trade names including<unk> il (BMS). It was patented in 1961 and approved for medical use in 1968.
Dicloxacillin
Piperacillin
Cloxacillin
Flucloxacillin
Resistin
Vancomycin
Cefazolin
Ciprofloxacin