The use of automated dispensing cabinets (ADCs) to enhance medication processes in hospitals has been increasing recently. Studies evaluated the effects of this technology on patient safety, workflow efficiency and cost reduction. To evaluate factors affecting nurses’ attitudes and acceptance of using ADCs, an online survey, including seven categories with closed-ended questions and one open-ended question, was developed based on technology acceptance model and instruments used in previous studies. Response rate was 29.4% of 1,062 nurses at King Faisal Specialist Hospital and Research Centre, Jeddah, Saudi Arabia. Perceived usefulness, perceived ease of use, perceived usefulness to enhance control systems and training have positive effects on improving nurses’ attitudes and increasing acceptance of using ADCs. Perceived risks had negative effects. The qualitative analysis of the open-ended responses supported these results and helped to identify many areas for improvement, especially in addressing perceived risks associated with the use of this technology.