Cancer and Shingles, Please Help!!!

 If anyone can guide me on this, I have an 80 year old Mother that is dealing with cancer, she is in remission now, but in May had came down with Shingles, she has had two shots in her spine to help with it,She has been prescribed pill's, but she still has no relief from them, what else can she do?I am at a loss, the pain management Dr. was my last idea for her.I have also heard conflicting statements concerning the vaccine for Shingles, since she has it now, it will offer her no protection in the future.Anyone else dealt with this awful stuff? Any ideas I can do for her now?Thank you!