Hi, I noticed in your profile that on April 21, your sister didn't take any of the antinausea meds. Is she taking them now? My mom takes them on chemo days weather she feels sick or not...Once you get the symptoms, it's too late.
Also, if your sister used to work out, she is probably a bit more nutricious minded than my mom. During chemo, I think calories and fluids are more important than what you are actually eating....If a milkshake and fries sound good, tell her to go for it! My mom tries to eat a little better, but sometimes ice cream ends up being dinner!
Good luck!
Shelley