Objectives: The role of clinical pharmacists in hospitals has evolved and continues to expand.In the UK, outside a few national policy drivers, there are no agreed priorities, measures or defined outcomes for hospital clinical pharmacy (CP). This paper aims to 1) highlight the need to identify and prioritise specific clinical pharmacy roles, responsibilities and practices that will bring the greatest benefit to patients and health-systems and 2) describe systemic weaknesses in current research methodologies for evaluating clinical pharmacy services and propose a different approach Method: Published reviews of CP services are discussed using the economic, clinical and humanistic outcomes (ECHO) framework. Recurring themes regarding study methodologies, measurements and outcomes are used to highlight current weaknesses in studies evaluating CP.Results: Published studies aiming to demonstrate the economic, clinical or humanistic outcomes of clinical pharmacy often suffer from poor research design and inconsistencies in interventions, measurements and outcomes. This has caused difficulties in drawing meaningful conclusions regarding clinical pharmacy's definitive contribution to patient outcomes.Conclusion: There is a need for more research work in NHS hospitals, employing a different paradigm to address some of the weaknesses of existing research on clinical pharmacy practice. We propose a mixed-methods approach, including qualitative research designs, and with emphasis on cost-consequence analyses for economic evaluations. This approach will provide more meaningful data to inform policy and demonstrate the contribution of hospital clinical pharmacy activities to patient care and the NHS.
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Key MessagesWhat is already known on this subject• Clinical Pharmacy is a diverse, complex discipline and clinical pharmacy activities are not easily defined or described • It is important to robustly show the benefits of clinical pharmacy, in order to justify resource use and to prioritise and measure activities • Studies purporting to demonstrate the outcomes of clinical pharmacy activities are often criticized due to methodological flaws, poor intervention descriptions and weak conclusionsWhat this study adds• The current positivist mindset is weakening the case for clinical pharmacy. There is a need for a new research approach for studying and evaluating clinical pharmacy interventions • Mixed-methods studies, incorporating quantitative and qualitative methodologies are more appropriate for evaluating the outcomes of clinical pharmacy • Cost-consequence analyses are more suitable for evaluating the economic outcomes of clinical pharmacy 5