'You don't throw these things out:' an exploration of medicines retention and disposal practices in Australian homes

Consumers most commonly discard unwanted medicines in household rubbish or drains, however, there are global concerns over the extent, environmental impact and health risks. When consumers procure or store medicines for future use, this can impact negatively on quality use of medicines and consumer safety. We sought greater insight into the extent of these practices by exploring the volume and types of medicines in Australian homes, and self-reported practices related to medicine accumulation, use and disposal. This qualitative study formed part of a larger project that included a general population survey on household medicine disposal practices.

Semi-structured telephone interviews were undertaken with a subset of respondents (n = 166) from the survey. Participants were eligible if they were experienced medicine users, i.e. used five or more prescribed, over the counter, and/or complementary and alternative medicines. Participants were asked to collect and name all medicines in their household; further detail was obtained about medicines used only when required or no longer used, such as expiry dates and quantity remaining. The quantitative data on the number and type of medicines stored at home were analysed descriptively. All interviews were transcribed verbatim and thematically analysed.

A total of 2301 medicines were identified as 1424 medicines not in everyday use (unused, unwanted, expired or when required) in 166 households, and 877 regularly used medicines by 119 participants. Medicines were often stored in multiple locations, particularly kitchens. Although accidental ingestion in children and pets and decreased efficacy were recognised health risks, this did not always translate to appropriate storage, usage or disposal practices. Individual risk-benefit assessments were applied to decisions to retain, use or dispose of medicines, including expired medicines.

Inappropriate medicine storage, use, and/or disposal practices raises public health concerns, particularly as there is a free returned medicines scheme available, and that this particular participant group were considered experienced medicine users. Healthcare professionals must act to address consumer misconceptions around the quality use of medicines, including medicine retention, storage and disposal. Future research is warranted to explore consumer practices in this context and confirm these findings in a younger, or healthier population.