The impact of short message services and personal consultation by pharmacy students on medication adherence and blood pressure control: study protocol for a cluster randomized trial

Purpose: Hypertension prevalence is mounting at a great pace in the People's Republic of China and poses a serious threat to health care systems. Medication nonadherence is one of the key factors in controlling high blood pressure. Our study uses two-arm cluster randomized controlled trial to investigate whether personal consultation by postgraduate pharmacy students and short message services (SMS) is effective in improving medication adherence and blood pressure control. Patients and methods: The trial will involve 384 treated patients in 8 community health care centers (CHCs). The 8 CHCs will be randomly assigned to intervention and control group in a ratio of 1:1. Patients in the intervention group will receive a personal consultation which identifies the barriers to medication adherence and SMS reminders which will be sent at 3-day intervals while patients in the control group will receive standard pharmaceutical care. Personal consultation by pharmacy students will be delivered at months 0 and 3. SMS messages will include educational information about normal blood pressure, complications of hypertension, salt intake, healthy diet, smoking cessation, regular exercise, weight control, antihypertensive medication schedule and treatment. Both groups will be followed for 6 months in order to compare their medication adherence and blood pressure at months 0, 3 and 6. The primary clinical outcome is the change in mean blood pressure and medication adherence measured at baseline, months 3 and 6. Secondary outcome is the proportion of patients reaching controlled blood pressure at months 3 and 6. Discussion: Pharmacy students led consultation will be conducted in the process of physical examination and SMS reminders which is at low cost, may be a feasible way to address the high prevalence of hypertension in the People's Republic of China.