PCS is not a SERM or any type of AI, it's a test booster.
The main ingredient in PCS is resveratrol, which
supposedly is a SERM (or at least a SERM-lite, lol). But let me tell you a little story...
I completed a very successful Superdrol 3on/4off pulse (low dosed - 20mg avg). The gains were excellent, and sides were basically non-existent. I had no lethargy, and no apparent shutdown, due to the HPTA bounceback on the 4 consecutive "off" days each week. (My "boys" didn't shrink, my libido was actually higher than normal, and my "equipment" worked just fine all the way through the cycle).
It didn't seem like I really even needed a PCT. But, just to be on the safe side, I chose to run a simple PCT with 6oxoExtreme (which contains both resveratrol as a SERM, and 6oxo as an AI) for 24 days. I tapered very carefully from 8 pills/day for 3 days, to 7 pills/day for 3 days, to 6 pills/day for 3 days, etc, all the way down to 1 pill/day for 3 days.
Everything seemed to be going just fine - I only lost a few pounds, and my strength actually continued to climb slightly. I was looking great, until...
Approximately 2 weeks after I finished PCT, my right nip started to itch one day at work. Slightly concerned, I went to bed that night as a man, but woke up the next morning as a pubescent little school girl, complete with a single budding breast. It was quite painful, with a pea-size lump, that was lima bean size by the end of the day. (At that rate, I'd be double-D's by the end of the week, lol.) And I was lactating quite proficiently - I could nurse twins.
It would take me probably a week to get some Ralox/Letro, but I needed something immediately. So here's what I tried: a quick trip to Vitamin Shoppe for Novedex XT (ATD, a serious AI) and p5p (safer form of B6, for lactating, prolactin concerns); and Albertson's for some nicotine patches (nicotine is supposedly a decent AI, and can be applied topically, directly on my right nip).
After just 3 days, it seems to be working very well. I stopped lactating, the pain is gone, and the lump is already mostly gone. Whew.
I'm going to continue for a few weeks, tapering the ATD (and the nicotine pasties). Then I
may go a few additional weeks back on the 6oxoExteme (tapering, of course). And I definitely haven't ruled out using some Ralox and/or Letro, but only if it's needed. I'm crossing my fingers.