Antipsychotics have overtaken antidepressants as the most costly class of psychiatric medication in England, according to a study by Stephen Ilyas and Joanna Moncrieff that will appear in the British Journal of Psychiatry, and are being prescribed in low doses for uses other than severe mental illness. With the cost of antipsychotics rising 22% per year from 1998 to 2010, they have made up an increasing proportion of all prescription drug costs.