Hi Laurie,
I'm not sure about the crash in this case (if he's only getting it once a week). Gordon is getting dex. with his overnight cisplatin in the hospital (once every 3 weeks) and then has to take 5 doses of it in pill form over 2 1/2 days when he goes home.
It was after the first chemo and he had finished the dex. at home, that he had the feeling of being "thrown out of a helicopter" the next day. Maybe if it's only given once a week, there isn't the same kind of let down. You might want to check with your MO about this.
It helps to know what's causing the behaviour, because then you don't think the person is just being difficult.

Anne