Lucica, They gave meds to help with the side effects. At the start of each infusion I got anti-nausea medication and steroids. I also got prescriptions filled for emend (an anti-nausea drug) copazine (another anti-nausea), prescription strength Imodium. I also got a pharmaceutical consult to help me deal with the anxiety and cope with the side effects of the steroids. I was given prescriptions for Lexapro, Xanax, and a mild sleeping medication due to the fact I had insomnia the day of and for 2-3 days after treatment.
If your mom is in a lot of pain I'm sure she will be able to get medications to manage it. The medical world is finally realizing that they have been under treating pain for the last 50 years, and my team seems to be very aggressive in treating it. I got a lidiacon lotion prescription to apply on the skin over my port 1/2 hour before they opened it. It did hurt, and I could have dealt with it, but the oncology nurse practitioner said "there is no reason to be in any more pain then necessary, don't be a hero, your going through a lot"