I thought it was time to post an update to this thread. I stopped taking Apalutamide nearly ten weeks ago, as it was beginning to cause me severe joint pain, particularly in my lower legs and hands. It was clearly doing what it was designed to and had lowered my PSA from 11.87 to 1.85 at my last test but at the cost of these side effects.
I was able to see a consultant rheumatologist, and she told me that she was starting to see other patients on Apalutamide in her clinic with similar side effects. My joint pain was diagnosed as arthralgia, which is akin to arthritis but without any swelling or inflammation. She gave me a shot of steroids in my backside that has helped considerably with my lower leg pain, but the pain in my hands continues to be a problem.
Within the next few weeks, I will have to make the decision to restart Apalutamide, most likely at a reduced dose. I was taking 4 x 60mg tabs a day, and I wonder if anyone has experience of a lower dose.
Thanks.