Hi, looking for some info. My dad was diagnosed with advanced prostate cancer in January. He was put on Prostrap and Apalutamide. His PSA has now gone back up to nearly 100 but they're not changing the treatment as he is generally feeling well. It seems odd to me to keep him on a drug when it doesn't seem to be working. Any ideas why they might be keeping him on it (and what might happen next?). Thanks all