Hi, I'm sorry to hear that your dad is unwell. It sounds as if he has a positive attitude towards his treatment which is a good thing to have.

Capecitabine often irritates the colon causing diarrhea which can be severe. I've just had my dose reduced by 25% because of it. Therefore it's important to drink plenty. If plain water isn't appealing he could try flavoured or add a cordial to it. 

He might be trying to take some control of the situation by insisting on driving himself for treatment. Just let him know that you're willing to help should he need it. 

We all react differently to our treatment but realistically none of it is pleasant. He may cope well throughout. On the other hand he might struggle after a few days. You can't really pre-empt how he'll be so just take it one day at a time.

I'm sorry it's not a straightforward response, cancer isn't straightforward unfortunately but I hope your dad's treatment goes well. 

Barb