[AnnieBL]

Did you mean to refer to SP? Otherwise what is SN? I never found that SP did anything for me, but that was probably because various BP medications I was then but am no longer taking (including high dose beta-blockers, digoxin and spiro), had already apparently permanently suppressed my T production, well before my PSA dropped like a stone: that only happened after I was on PM. I had changed from terazosin to tamsulosin as an alpha blocker when dropping the digoxin but I don't think that either is supposed to have much influence on PSA (unlike finasteride or dutasteride which can mask high PSA counts but which I have never taken). A supposed virtue of SP is that it does not influence PSA counts.