Practice Level Prescribing data was first released at a chemical level in December 2011 until April 2013.
From January 2013 data at a more granular level was released at presentation level. Chemical level data can be obtained by aggregating the presentation level data using the “Practice Level Prescribing Presentation-level Data – Month Year: Chemical names and BNF code” files provided with each data release. Presentation level data has since been made available back to August 2010 and continues to be updated monthly.