Hi, my friend has stage 4 lung cancer and has been having chemo and immunotherapy treatment in the UK. She was diagnosed June 2021. The treatment has been going well although I have noticed in the last few months she is sleeping a lot more, up to 15 hours at times and having naps during the day too. I know the treatment is gruelling and she is very unwell after it for about three days. My dilemma is, I am in Australia, I was thinking of travelling to see her in September but I am now concerned because of the prolonged sleeping that this may be a sign of deterioration or is it just the treatment side effect? I would be grateful for any advice.