Vicki the pump your talking about sounds like one of the treatments my wife receives 5FU. I don't know if all chemo treatments are the same or not but I know my wife receives two bags of some type of medication for nausea, plus an injection to help calm her before she receive her treatment of oxi and luco...then the 5fu after treatment her stomach is upset sometimes a little but she takes some type of pill before it gets to bad and that helps and her appetite is fine. If your mom is not receiving anything like I mentioned I be more than happy to call my doctor for you and find out what type of medication it is...hope this helps!
Tommy