My mum 85 years was diagnosed with GBM in February.  It's non operable and she decided not have a biopsy or Chemo/radiation for the sake of an extra couple months.  When she came out of hospital she was on Dexamethasone but this was stopped about 4 weeks ago.  I notice her condition is getting worse - speech and mobility.  I asked her GP about her staying on Dex but he indicated that there are side effects to this.   What is everyones experience on Dexamethasone.  Should I be making contact with Neurologist or relying on GP?     ... View more