Patients were given dexamethasone 2mg orally three times a day (tid) from the morning of their first radiotherapy fraction. The prophylactic dexamethasone will be continued until after they had received their fifth radiation treatment. Therefore, depending on the day of the week the patients started treatment, dexamethasone will be taken for 5 to 7 days. All patients will be issued with rescue medication, prochlorperazine 10mg every 6 hours orally if they develop nausea and vomiting. If patients still have nausea and/or vomiting during treatment of dexamethasone and prochlorperazine or after the fifth day of radiotherapy, ondansetron 8mg orally or iv one to three times per day or granisetron 1mg per os or iv once everyday 30mins before radiotherapy should be given.