My husband John had cisplatin 3 times and every time it was in the morning. All his daily radiation treatments were scheduled for late afternoon.

On the days he had the chemotherapy administered he would, as Gary suggested, worry about being sick when he had the mask on, but was lucky that never happened. Once John was in treatment, I didn't have any sense that they linked the order of giving the chemo/radiation to effectiveness. They gave the first chemo a couple of days after starting radiation and the last one a few days before ending the radiation.