I got pure sorboline from chemist warehouse, i think it was $7.99 for the tub, i'm not even halfway through the tub.
I have been using cortisone cream on my chest where I have had the worst reaction, although i've also got some dermatitis on my back. My radiation oncologist said i could use the same cortisone on that too, but I can't reach it. I just used it sparingly, then sorboline over the top of that and my skin has coped remarkably well. (i have the cortisone for flexural psoriasis - unrelated to my cancer)
I have also had indigestion and some nausea as well as pain in the breast area, it's also a bit puffy. So I have pain killers for that, pills for the indigestion, pills & wafers for the nausea....oh & sleeping pills to help me sleep.
However, tomorrow is my last one... yay!!
Good luck with your radiation, apparently nausea and indigestion are not regular side effects of radiation.. so likely you won't have to go through that.
I am claustrophobic, so get there half hour early & they give me a lorazepam to help me handle the machine.
I have photo's of me laying on the bed in front of the machine if you wanted to see what it looks like?
I've kept a regular thing going on facebook explaining step by step of my treatments for my friends and family, so had them take pic of me and the machine.