Det fås som kapsler (250 mg), tabletter (500 mg), et pulver til oral suspension (1 g/ 5 ml) og et pulver til infusionsvæske (drop i en blodåre; 500 mg).
It is available as capsules (250 mg), tablets (500 mg), a powder to be made up into an oral suspension (1 g/ 5 ml) and a powder to be made up into a solution for infusion (drip into a vein; 500 mg).