This one combines a chemical that binds to prostate tumor cells with another chemical that is radioactive. The radioactive chemical gives off alpha particles (an atom with two protons, two neutrons, and no electrons) that can destroy human cells but only have a range of about 0.1 millimeters. So they destroy the prostate tumor cells that they are brought against but do little damage to healthy tissues that don't attract the tumor sensing chemical. I guess it's like Xofigo, but not just for bones.
As with all the other treatments, some patients experience a dramatic response, some a good response, and some no response. One guy went from a PSA of 3,000 to < 0.1. Only a couple of guys out of 80 in the trial did that well but the researchers claimed that 75% had a positive response with lowered PSA and life extension. They also claimed the main side effect was dry mouth. (I'm thinking that the Budweiser company makes a useful treatment for that.)