My partner of 10 years was put on Capox earlier on in the year. His tumour wasn't responding to previous treatments. But his mood started to change: he became very distant, very short-tempered and rude, stopped interacting and, when he did talk, he didn't spend any time listening to me. Eventually, suddenly, after a row, he left and, apart from coming back for some things, hasn't been in touch since - nearly 4 months ago. I don't know when he's due for a mid-term CT to see if the tumour's responding this time or what's happening.

Is this common?