Chemotherapy induces nausea and vomit for some large patients. But, some chemotherapy protocol has a high indices of the incidence as observed in a combination of Anthracycline and Cyclophosphamide (AC). To prevent this symptoms, some medication can be used as Ondansetron. By other hands, the traditional acupuncture on Chinese Medicine have been used a PC6 point to avoid nausea and vomit. More recently, a transcutaneous electric nerve stimulation (TENS) also has been used for this application. Our study will test the TENS applied on PC6 point with two different frequencies (high and low) to evaluated the nausea and vomit inhibition effects.