RecruitingPhase 2Drug trialPhase 2a Study of High-Dose Testosterone Followed by Radioligand Therapy in mCRPCThe purpose of this study is to evaluate whether high-dose testosterone followed by targeted radioligand therapy (TRT) is effective in treating metastatic castration resistant prostate cancer. Participants will be asked to spend about 6 months in this study. Participants will take study drug for 3.5 months.