Hi, my dad has stage 4 prostate cancer which is now in his bones. He has had surgery, radiotherapy, and hormone treatment which now isn't working. He has started Radium 233 therapy.

Is Radium 233 purely for pain relief or for increasing life expectancy? He is very private and hasn't told us the prognosis or if the doctor has given him a timescale for the inevitable. I know everyone is differrent, but are we looking at a matter of months?