I have been researching these two compounds for my upcoming cycle and from what I am reading, it appears that Nolvadex is the weapon of choice during the cycle, but that it is also the weapon of choice for PCT as well. The information I found indicated that both Clomid and Nolvadex are anti-estrogens and both block estrogen by blocking up estrogen receptors in tissue, leaving estrogen in the body inert. I read further that Clomid also suppresses natural test production, while Nolvadex encourages it by increasing effectiveness of LH (leutinizing hormone - it stimulates the pituatary gland to release test). I have also read that Nolva acts more as an estrogen in the liver which lowers colestoral levels. I have inlcuded the link below to where I got some of my info...the rest I got just looking up "Nolvadex" on Google. This is an area of concern for me...both in blocking unwanted side effects and PCT...does anyone have any comment or advice in this regard?

Thanks

http://www.bodybuilding.com/fun/catnolv.htm