Background and Purpose: Use of Traditional Medicine is becoming progressively more popular worldwide. Vomiting is one of the useful way for taking waste substance out the body, which is known in Traditional Iranian Medicine (TIM). The aim of this study was assessment of vomiting and its usage from the perspective of TIM.

Methods and Materials: A literature search compiled some main traditional manuscripts of Persian medicine and definition of vomiting and similar words, as well as preventive methods of vomiting were searched. Finally gathered data were classified and reported.

Conclusion: The results of this study demonstrated that the mechanism of conventional medicine for taking out waste substance and toxicity of drugs from body are different from the mechanism of vomiting; also, vomiting act faster than conventional medicine for removing waste substance from the body. Therefore, identification of vomiting and it’s mechanism, as a useful method, is necessary.