Nolvadex raises overall estrogen. It also does nothing to lower estrogen. In fact its so close to an estrogen its self if used with deca it can cause prolactin gyno.. As you are on cycle people will use nolva to keep down bloat and its does work. It blocks the receptors but estrogen is still building. When they come of the nolva BAMB rebound estrogen and more often then not rebound gyno.
Now some people will use a ai at the end of this cycle or during pct for this reason, but what the hell is the point. Why not have run the AI from the start.
NOW 1 you have free floating estrogen and still getting higher, and 2 you have nolvadex which to the liver appers to be even more estrogen. HMMMMM lets think about this for a second???? it appears to your liver as an estrogen like metabolite thereby bonding to and acitivating E receptors in you liver. High estrogen is a signal in your liver to lower the production of igf-1.
Sow now not only do you have rebound to worry about, you also have lower igf fucking up your cycle too.