Hello. I work now a safety critical role on the railway, not as a driver, but as a guard. I have recently been told my GIST cancer has returned and I am to start taking Imatinib again. We have to notify resources if we take medication, and they will decide if we can work whilst taking it. Last time I was on this drug I worked somewhere else and although I had side effects, I was able to continue. I did however reduce my hours. Can work refuse to let me work due to the potential side effects of Imatinib? I expect I will need an OHS referral, but I am really worried about the potential ramifications if I can’t work. Any advice would be gratefully received