Capecitabine tablets

Hello, has anyone been on the capecitabine chemo tablets? My Dad has been prescribed them for his next session of chemo for 3 weeks (they've changed to this from etoposide) Having spoken to the pharmacist and consultant it sounds he may have to take up to 6 per day which to me seems a lot but i know they know what they're doing so just anxious about the side effects. 
any advice would be greatly appreciated.

thank you xxx