Patients' knowledge, attitudes and concerns regarding the disposal of expired/unused medication

Unused/expired medicines that are improperly disposed of can enter soil and water supply and have negative implications for public health. This study aimed to assess patients' knowledge and understanding of medication disposal practices and their willingness to participate in a medication takeback programme.

A self-administered questionnaire comprising of 26 questions based on demographics, knowledge, beliefs, practices and concerns was utilized in this study. The study was conducted over 12 weeks at outpatient pharmacy sites located in the four Regional Health Authorities in Trinidad. Statistical Package for the Social Sciences (SPSS) version 24 was used for statistical analysis.

A total of 547 persons completed the questionnaire. Knowledge of the dangers of improper medication disposal was highest in those aged 18-25 years (P = 0.007) and having secondary/tertiary level education (P = 0.002). Disposal of unused/expired medication via household thrash (86.1%) was the most commonly encountered practice. Only 14.1% (n = 77) of respondents asked the pharmacist for advice on best disposal practice, although 47.3% (n = 259) thought that the pharmacist should be the main source of advice for information on medication disposal practices. There was a willingness to participate in a medicine takeback programme from 82% (n = 449) of the respondents, and the majority (67.5%) (n = 303) would prefer it if medication takeback programmes were implemented at private community pharmacies.

Patients in Trinidad utilized household garbage as their main disposal method. There is a need to implement a medication takeback programme and educate the public on proper medication disposal.