Medical AI technologies promise to empower their users in managing their health. We develop a research model aiming to explain the role of user empowerment and resistance on the continuous use intention of medical AI technologies. The model was tested with data from 306 users of the Left-Hand Doctor chatbot in China. Users value the emotional support, responsiveness and accessibility of the chatbot. These features provide a strong explanation of user empowerment which in turn supports continuous use intention. While resistance to medical AI technologies negatively affects continuous use intention, it does not weaken the positive effects of empowerment. The research contributes to our knowledge of what user empowerment means and how it can support sustainable engagement with medical AI technologies. It further guides developers to more comprehensively consider similar user experience elements and positive outcomes of AI technologies in other application areas.