Fucicort® contains two different types of medicine. One medicine is called fusidic acid. It is a type of antibiotic. The other medicine is called betamethasone valerate. It is a type of corticosteroid (steroid). These two medicines work at the same time in different ways. Fucicort® works by: 1. The antibiotic killing germs (bacteria) that cause infections. 2. The corticosteroid reducing any swelling, redness or itchiness of your skin. Fucicort® is used to treat conditions where the skin is inflamed (eczema or dermatitis) and also infected by germs (bacteria).