Reconciliation of Islamic and Zoroastrian Decrees in the Medical Ethics of the First to Fourth Century AH

Adherence to ethical standards in the medical profession is under the heading of medical ethics. If medical ethics is one of the new topics, but these principles have been recommended to physicians in various religious books for centuries and it is required to adhere to those principles. There were practices as the foundations of medical ethics in ancient Iran under the influence of the Zoroastrian decree. Religious teachings about ethics were as ethical principles and foundations after the adoption of Islam in Iran. The center of gravity of this research includes identifying and explaining medical ethics and its commonalities among Iranians before and after Islam in the first century AH. Research questions are: Is there congruence between Islamic and Mazda's decrees on the medical ethics of the first four centuries of AH? And how did Zoroastrian medical ethics influence on the medical ethics of the Islamic era? This research is a descriptiveanalytical and historical research. This result obtained: It has many commonalities in both religions such as Doctors Knowledge of Jurisprudence Principles, Remembering God at all stages of treatment, Responsibility of the physician, Heavenly reward, visiting the patient, paying attention to the poor, being mobile a physician and prohibiting abortion. These are reflected in the affidavits and AndarzNameh issued by Muslim physicians in the first four centuries of Islam. On the other hand, these similarities reflect the influence of Iranian ethics on Islamic ethics through the translation and deduction of ethical principles and rules by Iranian physicians and scholars in the first four centuries of Islam.