hi louis
sorry to hear you're struggling with side effects .
i'm also having rads, number 17 of 25 today - i have a little cough but more to do with grandchildrens' germs i think!!
sounds like docs are doing what they can.....i can only suggest manuka honey.....will be soothing at the very least!
are you on hormone therapy? as i know that can sometimes give people throat problems
sorry i'm not much help but perhaps this will bump up post & someone else may be able to help or you could phone the helpline & i find they are always very helpful
k x