I was in the same position after a pause in eligard. For over a year my T levels and PSA stayed at zero, but I felt like crap. I was also anemic . I had TRT after that, and my serum T levels hit 1000! So I gradually reduced my T injections to the smallest increment I could see on the syringe, .01 cc. And my T levels dropped to 70, my blood values stayed in range, and my PSA. Stayed 0. That lasted another year til my PSA began to rise.

It seems once eligard turns T production off, in me the natural T production never returned.