Suzanne,
Sorry to hear about your mother and this is such an awful time of year for you both to have to go on this journey....yuck!
I can think of a few things that could help:
Make sure she is taking vitamins. My mom drank gatorade and ensure/boost a lot as well. Buy straws for the liquids...sometimes drinking something made her gag (when she had nausea) but the straw seemed to help for some reason.
If she has a lot of nausea that is not controlled by phenergan (what they usually first prescribe), talk to her dr about zofran (used by pregnant women too) and compazine (an older nausea med). Believe it or not, my mom believed that she found relief from Sea Bands which you wear on a cruiseship and Scopolomine patches you put behind your ears.
If she does vomit a lot, have her take around a small tupperware container with napkins in it whenever she goes to appointments or leaves the house. That way, if she needs to puke, she will have a ready made container that no one will know what it's use is.
Start a journal of her appts and anything that comes up regarding side effects, complaints, physical issues. You think you can remember everything but you just can't. Too much info overload.
Get her a lovely nightlight for her bathroom and bedroom so if she has to stumble to the bathroom in the middle of the night, you will be lighting her way.
Make sure she is mobile as much as possible. When you get older and do chemo and lay in the bed a lot, you are much more prone to blood clots (my mom had one go from her leg to her lung which resulted in one of the emergency room trips).
Her immune system will be very low and she will feel the worst starting at probably about the 5th day after treatment. If she is like my mom, she will have about 5-7 pretty decent days until the chemo starts all over again. And as she continues her treatments, the symptoms may worsen or intensify which is normal. But at that point, we can pray and hope she will be getting some good scans that will make it worth it.
If I can think of anything else I will let you know. Take care,
Laura