Tamoxifen is one of the main PCT drugs and is also an anti-estrogen, so it can prevent estrogen in the cycle as well as in the PCT cycle. So, how to use it? Tamoxifen In cycle When you use Tamoxifen in cycle, you use the anti-estrogen effect of Tamoxifen. Tamoxifen, as a selective estrogen receptor regulator, selectively acts on the …