Box 1.

Implementation strategy³¹ for the REACH project guided by NPT and priming; telehealth adaptation included

Intervention	NPT coherence	NPT cognitive participation	NPT collective action	NPT reflexive monitoring	Priming
Actors involved	Practice champion GPs or nurses in practice	PHN Practice champion GPs or nurses in practice	Practice champion GPs or nurses in practice	Practice champion GPs or nurses in practice	Patients
Action	Waiting room poster Resources for GPs/nurses Podcast with GPs with AOD expertise Telehealth adaptation	PHN — practice champion relationship Waiting room poster Reflection on data	Waiting room survey Within-consultation resources Pamphlets Telehealth adaptation	PHN and practice meetings: data presentation and discussion	Waiting room resources Consultation room resources Telehealth adaptation
When the action happens	Posters distributed at the start of the intervention Resources for GPs or practice nurses available throughout	PHN to engage the practice champion at the start of the intervention PHN to provide feedback every 3 months	All resources provided at the start of the intervention and available throughout	PHN to provide feedback every 3 months	All resources provided at the start of the intervention and available throughout
Target mechanism triggered by the action	Encourage discussion between GPs/practice nurses about alcohol BIs to improve understanding Increase GPs/practice nurses’ knowledge and self-efficacy	Relationship building between the PHN and practice via the practice champion Encourage conversations and community building between GPs, practice nurses, and staff in the practice	Resources support and trigger alcohol BIs within consultations SMS/email direct send to patienta Links within electronic medical recorda	GPs/nurses reflect on how they provide BIs GPs/nurses learn from each other about strategies for alcohol BIs in consultations	‘Primes’ the patient and increases awareness that GPs can talk to you about alcohol Options: SMS from appointment booking systema Practice website links and imagea Telehealth ‘waiting room’a
Outcome affected	Increase practitioner uptake of ABIs in general practice

^a Telehealth adaptations to the implementation strategy due to the pandemic; see Supplementary Box S2 for full details. ABI = alcohol brief intervention. AOD = alcohol and other drug. BI = brief intervention. NPT = normalisation process theory. PHN = primary health network. REACH = REducing AlCohol-related Harm. SMS = short message service.