Sue,

My sister also became extremely ill from the cisplatin. Threw up 14 times the first week and 13 the next week. She was taking compazine (3x's/day), decadron (2x's/day), zofran (2x/day) and ativan (3x/day). Finally her oncologist reduced her cisplatin to 50 mg(not sure if that is how it is measured) from 60 mg...a 20% reduction and it made all the difference in the world with the nausea from chemo. She also hydrated with 2 bags of saline, 2 days after each treatment....cisplatin is hard on the kidneys, so hydration is important, whether vomiting or not. She had the PEG before she started treatment, so was getting nutrition, it would probably be better/easier for your brother-in-law if he had one. Not sure what buccal mucosa is, so can't help you there. My best to you, your sister and brother-in-law, and just take it a day at a time.

Nancy