Globally, the prevalence of hypertension is on the rise, with a notable increase observed in low- and middle-income nations in Sub-Saharan Africa. The study investigated the impact of a phone and text message follow-up programme on hypertension patients’ adherence to their medications in Oyo Town. The study used the quasi-experimental research design, which involved the use of clinical trial to conduct pre and post intervention. Randomly allocated to the experimental (83 participants) and control (83 participants) groups. The modified Morisky Medication Adherence Scale (MMAS) was used to collect data. Descriptive statistics and sophisticated statistical tests including the Repeated measures analysis of variance (ANOVA) at 0.05, chi-square, and independent t-test were used to examine the data. The study found that 45.8% of experimental group participants and 72.7% of control group participants were 45–49 years old. Also, 33.3% of the respondents in experimental group have high blood pressure while 36.4% of the control group exhibit high blood pressure. Prior to the intervention, 72.7% acknowledge sometimes forgetting to take their medication however after the intervention there was consistent adherence in terms of taking all prescribed medication which is 71.4%. All the respondents (100%) expressed their readiness to engage in the acceptance of the follow-up programme. However, 81.9% of those in the experimental group reported satisfaction compared to 62.3% in control group. Mean adherence for experimental group is 1.13 while control group is 0.25. Hence, there was significance difference between pre and post intervention medication adherence among patients in experimental groups with p value ˂ 0.000. The more pronounced effect observed in the experimental group suggest that telephone and text message follow-up programs, play a crucial role in fostering drug adherence regimens and improving hypertension management outcomes.

Keywords: Hypertension, text messaging, patient, telephone, medication adherence,

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