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Self‐reported medication adherence measurement tools: Some options to avoid a legal minefield

Self‐report questionnaires are used to measure medication adherence, often times both clinically and for research purposes. Despite the presence of several published tools, some may have prohibitive licensure and fee requirements, which researchers should be aware of prior to using them. This paper presents a summary of selected self‐report measures, which have been developed and validated in various health conditions and can be used free of cost.