Reuse of unused medications: a cross-sectional study on public willingness and influencing factors.

Medication waste is a significant global concern with environmental, economic, and healthcare implications. In Saudi Arabia, approximately 25.8% of dispensed medications are wasted, resulting in an annual cost of $150 million. Re-dispensing unused medications has been proposed to reduce this waste; however, its feasibility depends on public acceptance, regulatory frameworks, and assurances of safety. This study aimed to assess the Saudi public's willingness to accept re-dispensed medications returned unused to pharmacies and to identify factors influencing this willingness. A descriptive cross-sectional survey was conducted online across Saudi Arabia. The questionnaire, adapted from a validated tool by McRae et al. McRae et al. (Pharmacy (Basel), 2021, 9(2): 77) and translated into Arabic, explored demographics, medication practices, storage and disposal, and attitudes towards medication waste and re-dispensing. The survey was distributed via social media. Data were analyzed using SPSS version 29, including chi-squared tests and binary logistic regression. A total of 405 participants completed the survey, primarily female (64%) and aged 25-44 years (43%). About 64% reported having unused medications at home, most commonly stored in bedrooms (55.1%) and kitchens (53.6%). Disposal practices included keeping medicines for future use (62.5%), discarding them with household waste (45.7%), sharing them with others (21.5%), and returning unused medications to a pharmacy (8.4%). Approximately 60% were willing to accept re-dispensed tablets and 55% capsules, whereas fewer accepted other dosage forms. Key factors influencing acceptance included pharmacist verification of quality and integrity (79.3%), informed consent (77.3%), expiry dates (77%), and intact packaging (74.8%). Most participants (68.1%) indicated they would return unused medicines if a re-dispensing program were implemented, and half (50.6%) believed all medications, not only expensive ones, should be considered. Significant predictors of willingness included age (P < 0.001), employment status (P = 0.004), regular prescription use (P = 0.046), and concern about waste (P < 0.001). Younger participants showed higher acceptance, while employed individuals, retirees, and regular medication users were more hesitant. The findings indicate cautious yet notable public support for medication re-dispensing in Saudi Arabia, particularly for oral solid dosage forms, provided rigorous safety measures are assured. Policymakers should consider these insights to guide initiatives aimed at reducing medication waste.