I can't agree more with what everyone else has said. It is very important to finish all treatments and if at all possible without any breaks. Like I think it was Gary said, if the cancer comes back and treatment wasn't finished or was delayed, it is tough to live with the "if only I pushed through it". I know my wife was basically in bed 24 hours a day except to get treatment and used enough pain meds, nausea aids, anti-diahrea medicines to survive. She ended up having about a week break near the end when the skin on her neck broke down too much and they needed to let it heal before continuing. Five months later, we found out that the cancer had spread and is now incurable. That week probably didn't make any difference but even if there was a 1 in 10,000 chance of changing the outcome, I wish we would have found some way to not take that break. At the time she was going through treatment, I was doing a lot of reading here and other sites and I believe I had seen some study that had shown a correlation between survival rates being much better having treatment completed within 100 days from surgery. Maybe you could call it tough love, but if at all possible, he needs to realize his job right now is nothing other than surviving treatment. I think it is a great idea if someone can go with him to treatment, in our case I value that extra seven weeks I was able to spend with her even if it was sitting in a waiting room.

Our thoughts and prayers are with you, your father and your family.