There is a variety of persuasive applications that have been proposed in different application domains like well-being, health-care and e-commerce. However many have been designed largely for a general audience. Designers of these technologies may achieve more success if applications consider contextual information of the user for making them more adaptable. This paper is an proposal for improving medication adherence by sending personalized persuasive message and reinforcing feedback. To do this, we propose an adaptive services oriented architecture, and a persuasion strategy defined for selecting the appropriate persuasiveness level according to contextual information such as time and stress. Stress measure is derived from physiological data (e.g. Electro Dermal Activity, heart rate, temperature), which is collected through a wearable wireless multi-sensor device.