“…Previous studies have suggested that seniors' ability to take oral prescription drugs safely is affected by cogni-tive function and socioeconomic status [2,26], health knowledge, and health and medication habits [8,27]. In addition, studies have suggested that special attention should be paid to persons taking three or more drugs, living alone, and receiving drugs from multiple doctors, as well as to those with pre-dementia symptoms, as they are at higher risk of non-adherence [2,21,25,28].…”