Hyperkalaemia

In this clinical review by Moffat J Nyirenda and colleagues (BMJ 2009;339:b4114, doi:10.1136/bmj.b4114), the authors gave two dosages in milligrams, when in fact the correct units should be grams. Thus in the final paragraph of the section “How is severe hyperkalaemia managed?” the penultimate sentence should start: “They [cation exchange resins] act more quickly when given as enemas (for example, calcium resonium 30 g) than when given orally (15 g four time a day).”