Medicines optimisation requires more patient engagement and professional collaboration within health and social care settings. It focuses on actions taken by all health and social care practitioners. To support the medicines optimisation agenda a guide on medicines optimisation has been produced by The Royal Pharmaceutical Society (RPS) the aim of which is to help patients make the most of their medicines (17). This guide involves four key principles for medicines optimisation in order to achieve improved patient outcomes (16). These principles are as follows: