<![CDATA[Background: Chemotherapy is the main treatment for breast cancer patients but often causes side effects such as nausea and vomiting, which can reduce patients’ quality of life. Peppermint aromatherapy is a complementary therapy that has antiemetic and relaxation effects. Purpose: To determine the effect of peppermint aromatherapy on nausea and vomiting scores in breast cancer patients after chemotherapy. Method: This study used a quasi-experimental design with a one-group pre-test and post-test approach. The sample consisted of 20 breast cancer patients undergoing chemotherapy, selected using purposive sampling. Nausea and vomiting scores were measured before and after the intervention using an observation sheet and analyzed using a paired t-test. Results: The results showed a decrease in the mean nausea and vomiting scores after peppermint aromatherapy. Statistical analysis indicated a significant difference between pre-test and post-test scores (p < 0.05). Conclusion: It can be concluded that peppermint aromatherapy is effective in reducing nausea and vomiting in breast cancer patients after chemotherapy and can be used as a safe and simple non-pharmacological nursing intervention.]]>
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