Antiestrogens
Of all the antiestrogens, nolva is the worst. It blocks all receptors; it does not prevent the formation of estrogen. The liver and kidneys now have to get rid of all that estrogen floating around in the blood. Now, you get some rebound from the estrogen that has pooled. In people who are endomorphs--obese tendencies--this is seen pretty readily. Arimidex is best for these folks. Clomid is good during and post-cycle for mesomorphs and ectomorphs. As a matter of fact, arimidex and clomid are the only antiestrogens I use with my clients now. Arimidex inhibits the formation of estrogen, and clomid selectively blocks estrogen receptors (breast tissue, adipose).