Key factors underlying the willingness of patients with cancer to participate in medication redispensing

Background: Redispensing medication unused by patients to other patients could reduce the environmental burden of medication waste. Simultaneously, associated financial loss could be reduced, particularly for expensive medication such as oral anticancer drugs. An important determinant for successful medication redispensing is patient participation.Objective(s): To identify key factors underlying the willingness of patients with cancer to participate in the redispensing of unused oral anticancer drugs.Methods: Semi-structured interviews via telephone or video call were conducted with adult patients diagnosed with cancer from two Dutch hospitals. The interview guide was framed using the COM-B model for behavioural change, to elicit patients' capability, opportunity and motivation to participate in medication redispensing. Questions were related to patients' willingness to accept redispensed medication, reasons thereof, perceived concerns and needs. Inductive thematic analysis was applied.Results: Seventeen patients (aged 38-82 years, 71% female), with nine different types of cancer participated. The majority of participants supported medication redispensing. Four categories of key factors underlying the willingness of patients with cancer to participate in medication redispensing were identified. First, the driver for participation was having positive societal impact, relating to affordability and sustainability of healthcare. Second, having trust in product quality was a requirement, influenced by preconceived beliefs, quality assurance and patients' knowledge of this process. Third, a facilitator for participating in medication redispensing was adequate provision of information. This concerned awareness of medication waste, information about medication redispensing, support from healthcare providers and other patients, and insight into medication dispensing history. Last, a convenient process for returning unused medication to pharmacies would facilitate participation in medication redispensing.Conclusions: The willingness of patients with cancer to participate in medication redispensing relates to a drive for achieving positive societal impact, provided that medication is of high quality, there is adequate information provision and a convenient process.