Table 1 Key interview guide topics

Medicines in the home

Brand and/or generic name and storage location of medicines regularly used, medicines used as required and medicines no longer used.

Medicines not in everyday use

Formulation, quantity remaining and expiry date; disposal method/s; risks of keeping in the home.

Medicine supply

Frequency of supply, e.g. on-time, in-advance, just-in-case; household member/s who used the medicine; where the medicine was obtained, e.g. pharmacy, supermarket.

Medicine disposal

Self-reported disposal practices, views on and/or concerns related to what happens to medicines returned to a central location, e.g. a pharmacy.

Willingness to pay for safe disposal

Yes/No; explanation.

Demographic information

Gender, age, living arrangements, location, education, employment status, language spoken at home.