A cross-sectional study on effectiveness of antiemetic regimens for chemotherapy-induced nausea and vomiting: A single-center retrospect study of 1,000 patients.

Abstract

e24100 Background: Chemotherapy-induced nausea and vomiting (CINV) is a common symptom in patients who undergoing chemotherapy, it is very important to control CINV to maintain dose intensity and patients' quality of life. To analyse the current situation of CINV for the tumor patients who undergoing chemotherapy, we used a cross-sectional survey to assess CINV status in those patients, and whether the drugs used by doctors in each department met the guidelines, and compared the efficacy of different antiemetic regimens on acute and delayed CINV overall post-chemotherapy periods. Methods: 1,000 patients were randomly selected from 5,468 patients with chemotherapy discharged from different departments of Zhejiang cancer hospital in China between April 1 and April 30, 2019, and there were 87 responses totally. Medical records were collected on patient’s department (internal medicine, surgery, radiotherapy, interventional), chemotherapy regimens, anti-vomiting program, etc. Patients' feedbacks were recorded by CTCAE4.03 standard using MASCC antiemetic tool (Mat). Participants reported the frequency, severity, and impact on daily life of CINV from the day of chemotherapy administration up to 5 days thereafter and nausea and vomiting, as well as pharmacologic and chemotherapy used. Results: A total of 66 antineoplastic drugs were investigated, of which 52 were given intravenously and 14 orally.There were 9, 7, 50 drugs with high, moderate and low emetic risk respectively.The most prescribed prophylactic regimens for the management of CINV were aprepitant, 5-HT3R, H1-RA and dexamethasone and metoclopramide. The overall incidence of CINV were 44.34%, 24.57% and 39.66% patients reported nausea or vomiting in the acute and delayed phases. 19.89% patients had both acute and delayed CINV. The consistency rate of antiemetic with guideline was 63.19% in internal medicine department, 61.41% in surgery department and 52.91% in radiotherapy department, which showed a significant gap between the actual use of drugs and the recommended guidelines(P = 0.001). In 875 patients, 518 patients received guideline recommended antiemetic regimen, the CINV rates of complete response (CR), defined as no vomiting with no rescue medication, were 61.58%. While the CR rates in other 357 patients were 47.06%(P < 0.001). Nausea was more frequent across the overall observation period (43.77% VS 18.86%). However, vomiting was more sever and had a greater impact on life than nausea. Conclusions: Overall, adherence to the guideline recommendations in different departments were poor with varying degrees. Future studies should set hard outcomes, such as the absence of any symptoms, as a primary end point. The standardized management of CINV in patients need to be further strengthened and doctors need to use drugs more regularly to reduce the occurrence of CINV in patients.