@angleblue I didn't fast and didn't have any problems with nausea during FEC (or docetaxel, for that matter), but I only had 3 cycles of FEC. I did make sure to drink at least 2 liters of water the day before, day of, and day after chemo -- generally hitting 3 to 4 liters on those days, and aiming for 2 liters every day throughout. I also ate lighter suppers the day before chemo.
FWIW, I also didn't suffer from any mouth ulcers; I just had one tiny brush with what I thought was oral thrush at the far back of my throat during docetaxel, but my oncologist said it looked like mucositis. (I had some pain in my esophagus, which she thought was related.) Before I started, my nurse, who previously worked on an intensive care unit, suggested using a baby toothbrush and children's Sensodyne toothpaste, and brushing immediately after all meals and snacks, followed by either Corsodyl mouthwash (5 minutes after brushing) or bicarbonate of soda dissolved in a warm water. I made sure to gently brush sides and roof of mouth and tongue, not just my gums, and my mouth was sore-free. My nurse also advised getting a new toothbrush every week, but instead I bought 2 and sterilized them on alternate weeks (7-10 minutes in boiling water; somewhat annoying as you have to hold them down with something since they naturally float). I bought bamboo-handled brushes to minimize plastics exposure; they were barely more expensive than plastic ones.
