 3. Structured follow-up over telephone and in Clinics: NPs and nurses in intervention polyclinic will be proactive in follow-up of their patients for self-monitoring of BP and providing advice for adherence to treatment every 4 weeks for the duration of the project 3 months. A communication checklist for the follow-up will be incorporated to the existing follow-up system. Information on adverse events will be obtained and action plan will be communicated with patients discontinue the suspected drug and arrange visit to clinic, as appropriate. 