Table 1.

Overview of the design questions, prototypes and participant feedback groups for the development study.

Step	Design question	Agreed prioritization with steering committee and rationale	Prototype used to explore	Feedback participant group
2.	What is the best way to approach patients to receive intervention in a community pharmacy setting?	High: as this is a new setting for a digital communication intervention in the United Kingdom	Video of PAa inviting patient to receive the intervention	Patients
2.	Who is the best person to approach them?	Medium: need to check if this needs to be a pharmacist or could be support staff	Video of PA inviting patient to receive the intervention	Patients
2.	What would encourage patients to find out more about the intervention?	High: need to ask about information needs to help patients decide if intervention will be helpful for them	Video of PA inviting patient to receive the intervention	Patients
3.	How should the pharmacist consultation be structured?	High: explore content and delivery for initial acceptability	Video of pharmacist consultation	Patients and HCPsb
3.	How would barriers to medication adherence be assessed?	High: explore useability of the tailoring tool, ease of completion	Tailoring questionnaire	Patients
3.	What information will patient need before setting up the text messaging?	High: identify key questions patients have about the text messaging	PILc for intervention	Patients
3.	What should the information for patients look like?	Medium: explore length and presentation of the information materials	PIL for intervention	Patients
4.	What information should text messages contain?	Medium: information will be taken from other studies but will require a sense check	Document describing the TMd content tailoring process	HCPs
4.	Which messages should we ask patients to respond to?	Medium: information will be taken from other studies but will require a sense check	Document describing the TM content tailoring process	HCPs
4.	What information will we ask patients to send back?	Medium: information will be taken from other studies but will require a sense check	Document describing the TM content tailoring process	HCPs
5.	What happens if the pharmacy needs to refer the patient to another health care professional?	High: need to explore how communication between community pharmacies and general practice might work	Communication diagram	HCPs

^aPA: pharmacy assistant.

^bHCP: health care professional.

^cPIL: patient information leaflet.

^dTM: text message.