Abstract
BACKGROUND: Poor adherence to antihypertensive treatment is a common problem among elderly hypertensive patients and one of the leading causes of inadequate blood pressure control. In this sense, it is essential to improve strategies for effective communication in managing hypertension treatment for this group. OBJECTIVE: This study aimed to validate the text messages of a mobile application to aid adherence to antihypertensive treatment, nutrition, and physical activity among older adults with hypertension treated in Brazilian public primary health care. METHODS: This descriptive, methodological development study with a quantitative approach was carried out between March and August 2024. RESULTS: A total of 27 messages were constructed and validated by 13 experts, and this stage was divided into two rounds. The Content Validity index and percentage of agreement were used in the validation process. The messages were developed using theory, national guidelines, validation, and expert review. CONCLUSIONS: Text messages for adherence to antihypertensive treatment involving medication, nutrition, and physical activity have enormous potential with the target audience studied.