Pharmacist prescribing has evolved to meet healthcare system needs, but the effectiveness, mechanisms and contextual factors influencing education programmes remain poorly understood. Realist approaches are fairly novel in pharmacy practice research. This realist synthesis aims to answer the question: to what extent do pharmacy prescribing education programs work (or not), for whom and under what circumstances, and why?

A realist methodology (realist synthesis) will be used to review the outcomes of programmes. Pawson’s key stages will be followed: (1) clarifying the scope; (2) determining the search strategy; (3) study selection; (4) extracting and analysing data; and (5) synthesising findings and drawing conclusions. The synthesis will follow Realist And Meta-narrative Evidence Syntheses–Evolving Standards publication guidelines. Data extracted will include the study characteristics, alongside the contexts, mechanisms and outcomes of varied pharmacy prescribing education programmes. The search strategy will include searching PubMed, Scopus, Web of Science and CINAHL Complete. An initial programme theory will use selected grey literature. Context-mechanism-outcome configurations will be identified, and recurring patterns will be synthesised to refine the initial programme theory.

Ethics approval is not required. Dissemination will be sought via peer-reviewed academic conferences and journals.

CRD420251056576.

Acute intracerebral haemorrhage (ICH) is devastating with a 1 month mortality rate of ~40%. Cerebral oedema can complicate acute ICH and is associated with poor outcome. In patients with large ICH, the accompanying swelling increases mass effect and causes brain herniation. Mannitol, an osmotic diuretic, is used to treat cerebral oedema after traumatic brain injury, but its safety and efficacy in ICH is unclear. We aim to assess the feasibility of a phase II randomised, controlled trial of mannitol in patients with ICH with, or at risk of, cerebral oedema to inform a definitive trial.

The mannitol for cerebral oedema after acute intracerebral haemorrhage trial (MACE-ICH) aims to include 45 ICH participants from 10 UK sites with estimated largest diameter of haematoma volume >2 cm, presenting within 72 hours of onset with, or at risk of, cerebral oedema (limited Glasgow Coma Scale (GCS)8) with or without mass effect. Participants will be randomised (1:1:1) to 1 g/kg 10% single-dose intravenous mannitol, 1 g/kg 10% mannitol followed by a second dose at 24 hours, or standard care alone. Outcome assessors will be masked to treatment allocation. Feasibility outcomes include proportion of patients approached being randomised, participants receiving allocated treatment, recruitment rate, treatment adherence and follow-up. Secondary outcomes include serum electrolytes and osmolality at days 1–2; change in ICH and oedema volume at day 5; number of participants who developed urinary tract infection, GCS and National Institutes of Health Stroke Scale at day 5±2; length of hospital stay, discharge destination and death up to day 28; death and death or dependency by day 180 and disability (Barthel Index), quality of life (EuroQol, 5-D) and cognition (telephone mini-mental state examination) at day 180.

MACE-ICH received ethics approval from the East Midlands-Leicester Central research ethics committee (22/EM/0242). The trial is funded by a National Institute for Health and Care Research RfPB grant (203080). The results will be published in an academic journal and disseminated through academic conferences and patient support groups. Reporting will be in line with Consolidated Standards of Reporting Trials recommendations.

ISRCTN15383301; EUDRACT 2022-000283-22.