Do you regularly utilize antiemetic or GI prophylaxis when treating abdominal sites with SBRT?

I regularly use antiemetics for patients treated with SBRT for pancreatic cancer and selectively for patients with liver metastases or hepatocellular cancer. I am agnostic about the antiemetic choice, often the patient has either ondansetron or prochloperazine already; and I ask them to take it 30-6...