Anti-aromatase - used to block the conversion of aromatizing aas to estrogen, and through binding to the enzyme aromatase, can block the production of estrogens in the body. Bodybuilders everywhere are using this class of drugs during cycles with particular steroids, this will avoid any mishaps to prevent any undesirable hormonal activity. Before any symptoms of aromatization have occurred at the beginning of a cycle, take anti-aromatase.

Arimidex often gets confused with an anti-estrogen, but in actuality is an aromatase inhibitor. This is necessary to use when using massive amounts of aromatizing aas, or when prone to developing gynecomastia and using average amounts of aas. Overall, also true with all aromatase inhibitors, the mechanism of action is to block the conversion of aromatizable steroids to estrogen. This is quite opposite to the mechanism and action of an anti-estrogen, like clomid or nolvadex, which take up the role in the receptors in place of estrogen so that estrogen is blocked. Usually if you are using arimidex, you aren't using clomid, but doing so may have beneficial results.
Arimidex fortunately does not contain the side effects of a lot of aromatase inhibitors, such as cytadren or others, a high degree of estrogen blocking will also be developed. Testing should always take place and minimum dosage applied as you don't want to reduce estrogen so that you don't have enough left.
SERMs are used to jump-start a person's individual sex hormones by influencing the hypothalamohypophysial testicular axis which releases more gonadotropin in order for rapid release of fsh and lh. To kickstart your own hormonal assay use these post cycle.
Clomid is often grouped with anti-estrogens or anti-aromatase/ aromatase inhibiting drugs, it is however very different. This is a synthetic estrogen which belongs to the group of sex hormones, as nolvadex does. When the body's own testosterone production is slowed down because of aas, clomid is effective. This is the reason that most take clomid once steroids have been discontinued. Restoring normal levels of testosterone as quickly as possible is important so that losses of muscle mass and strength is as low as possible. Hcg is a great combination for clomid and can offer even greater results. The anti-estrogenic effects of clomid are lower than those found in proviron and teslac.