Re: Chemotherapy - Staying hydrated
First off, make sure she's drinking decaf coffee. There's still some cafeine in it, but not very much and the fluid will help.
Has she tried club soda? It might taste better than water because of the bubbles. Also, with water, you might try putting ice in it so it's very, very cold. Even if she can't drink a lot at one time, if she can manage one sip every few minutes, she'll get enough fluid.
If she gets seriously dehydrated, her doctor can give her fluids intravenously...in fact, they could probably give her some fluids when they give her chemotherapy, either immediately before or immediately after the chemo, while she's still got the IV in place.