Sturgiss, ElizabethAdvocat, JennyLam, TinaNielsen, SuzanneBall, LaurenGunatillaka, NilakshiMartin, CatherineBarton, ChrisWah Michael Tam, ChunSkouteris, HelenMazza, DanielleRussell, Grant2026-06-132026-06-130960-1643PubMed:37666514ORCID:/0000-0003-4428-4060/work/217155101https://hdl.handle.net/1885/733811401Background Brief interventions (BIs) are effective for reducing harmful alcohol consumption, but their use in primary care is less frequent than clinically indicated. The REducing AlCohol-related Harm (REACH) project aimed to increase the delivery of BIs in primary care. Aim To assess the effectiveness of the REACH programme in increasing alcohol BIs in general practice and explore the implementation factors that improve or reduce uptake by clinicians. Design and setting This article reports on a sequential, explanatory mixed-methods study of the implementation of the REACH project in six general practice clinics serving low-income communities in Melbourne, Australia. Method Time-series analyses were conducted using routinely collected patient records and semi-structured interviews, guided by the consolidated framework for implementation research. Results The six intervention sites significantly increased their rate of recorded alcohol status (56.7% to 60.4%), whereas there was no significant change in the non-intervention practices (344 sites, 55.2% to 56.4%). Conclusion REACH resources were seen as useful and acceptable by clinicians and staff. National policies that support the involvement of primary care in alcohol harm reduction helped promote ongoing intervention sustainability.This research was funded by the Victorian Health Promotion Foundation Impact Research Grant. The funder was not involved in the conduct of the study. Elizabeth Sturgiss and Lauren Ball receive salary support from National Health and Medical Research Council (NHMRC) Investigator grants. Suzanne Nielsen is the recipient of an NHMRC Population Health Career Development Fellowship (reference number: 1163961).enPublisher Copyright: © 2023 Royal College of General Practitioners. All rights reserved.alcohol drinkingbrief interventionsCOVID-19implementation scienceprimary health care202310.3399/BJGP.2022.061385174080242