A study of 145 GP practices in England from 2004 to 2008 highlighted antipsychotic drugs as having the most notable difference in redemption rate compared to other drugs; at 85.1 per cent compared to the mean average for all drugs of 98.5 per cent.

The report Prescribing Compliance, a review of the proportion of prescriptions dispensed, for the first time compares prescriptions written by GPs and other practice staff with those dispensed by pharmacists – giving a “redemption rate” and examining if patients pick up the medication they are prescribed.