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Design features that contributed the most to the occurrence of use difficulties were the dimensions and surface texture of the dosage form (29.6% and 18.5%, respectively). A total of 158 use problems were identified, of which 45 were categorized as use difficulties and 113 as use error. The practical problems and management strategies were categorised into 'use difficulties' and 'use errors'. Information on practical problems, strategies to overcome these problems and the medicines' design features that caused these problems were collected.

A qualitative study with semi-structured interviews on the experiences of older people with the use of their medicines was performed (n=59). The purpose of this study was to identify design features of oral medicines that cause use problems among older patients in daily practice. However, several studies showed that people experience a variety of problems using their medicines. Usability is a key factor in ensuring safe and efficacious use of medicines.

Notenboom, Kim Leufkens, Hubert Gm Vromans, Herman Bouvy, Marcel L

Learning from patients: Identifying design features of medicines that cause medication use problems.

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