Muslim is allowed to study any system of medicine as far as it is a medical science with out any additional non medical opinions. Non Muslims' opinions are not part of the medicine but their way in understanding or dealing with it. We study the medical science and leave the non Muslim myths. Our Muslim history has evidence that we take medical knowledge and other worldly sciences from any expert being Muslim or non Muslim. No doubt, we have great treasure of medical knowledge in thousands of narrations and sayings of the Prophet (SAWA) and Ahlul Bayt (AS). That does not stop us from studying any other source of medical knowledge.