Flucloxacillin

Flucloxacillin (INN) or floxacillin (USAN) is a narrow-spectrum beta-lactam antibiotic of the penicillin class. It is used to treat infections caused by susceptible Gram-positive bacteria. Unlike other penicillins, flucloxacillin has activity against beta-lactamase-producing organisms such as Staphylococcus aureus as it is beta-lactamase stable. However, it is ineffective against methicillin-resistant Staphylococcus aureus (MRSA). It is very similar to dicloxacillin; they are considered interchangeable. While no longer used in the United States, Flucloxacillin is supplied under a variety of trade names in other countries, including Floxapen (Beecham, now GSK), Flopen (CSL), Staphylex (Alphapharm), Softapen (Rephco Pharmaceuticals Limited), Flubex (Beximco Pharmaceuticals Ltd, Bangladesh), and Flupen (for state use only in South Africa).