ACTRN12616000910404.

Methods	Sequential mixed methods with a nested pilot RCT
Participants	Inclusion: 18 years or older; established diagnosis of cardiac disease and referred to cardiac rehabilitation; ≥ 1 cardioprotective medication; must have primary responsibility for taking medications; able to speak, read, and understand English; own a mobile phone (able to receive and reply to phone/text messages); willing to give written and oral consent; ≥ 1 medication non‐adherence factor
Interventions	Patients identified as non‐adherent based on the result of exploratory phases (phases 1 and 2) will be invited to participate in the pilot randomised controlled trial (RCT) phase Intervention: participants will receive usual care plus behavioural counselling about medication adherence using motivational interviewing (MINT) techniques and text message reminders (TM). Each patient will receive approximately 30 to 40 minutes of a single MINT counselling session by the researcher following recruitment. The MINT counselling will be delivered by the researcher, who is a registered nurse. TM will be sent to participants: 1 text message daily for 2 weeks, then on alternate days for 2 weeks, then on a weekly basis for the next 6 months Control: usual care
Outcomes	Self‐reported medication adherence rate ‐ assessed by Medication Adherence Questionnaire (MAQ)
Notes	ACTRN12616000910404 First enrolment: 1/09/2016. Last data collection: 03/07/17 Trial not completed due to lack of participants within inclusion criteria. Manuscript currently under review (January 2019) Investigator contacted: Dr. Ali Al‐Ganmi (email: ali.h.al‐ganmi@student.uts.edu.au) provided unpublished data: 120 participants = 82 (68.3%) aged 65 years or older, 66 (55%) used 4 or more medications