IRCT2014050215649N2 IRCT 2014-11-14 Vice chancellor for research, Tehran University of Medical Sciences The effects of aromatherapy with peppermint oil for chemotherapy induced nausea and vomiting Comparison the effects of aromatherapy with peppermint oil and routine drug for chemotherapy induced nausea and vomiting in patients with breast cancer 2014-11-01 anticipated 100 Complete https://irct.ir/trial/14854 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Used, Assignment: Parallel, Purpose: Prevention. N/A Nausea and vomiting. Intervention 1: The intervention group, besides the standard medications prescribed by a doctor, will trained to pour 2 drops pure peppermint oil (Barij Essence Kashan) by dropper on a napkin (size 20 × 20 cm) and attach with a pin on their collar then will be asked for taking breathe normally for 20 minutes. They will teach to do it three times each day (morning, noon and evening) for five consecutive days. Intervention 2: For control group will be used normal saline as a placebo.