Pharmacist Independent Prescriber (PIP) deprescribing in UK care homes: contextual factors associated with increased activity.

The Care Home Independent Pharmacist Prescriber Study (CHIPPS) process evaluation hypothesised that contextual factors influenced the likelihood of deprescribing by pharmacist independent prescribers (PIPs). The aim of this paper is to test this hypothesis. From CHIPPS study data, medications deprescribed totalled 284 for 370 residents in UK care homes. Regression analysis was used to describe the relationship between the number of medicines stopped and contextual factors (number of residents cared for, pharmacist employment within associated medical practice, previous care home experience, hours active within trial, years' experience as a pharmacist and as a prescriber). Number of residents and PIP employment within a medical practice were positive predictors of deprescribing. Previous experiences were not related to deprescribing likelihood. Increasing the number of residents increases the opportunity for deprescribing and therefore this relationship is intuitive. The location within a medical practice is an interesting finding and requires further exploration to understand the exact nature of this.