Cimaterol is a stimulant, a fat burner, and similar to clenbuterol in many ways and different in some very important ones. Both clen and cimaterol are beta-adrenergic agonists, and thus are both anabolic as well as thermogenic (Reprod Nutr Dev. 1988; 28(1):61-84. Domest Anim Endocrinol. 1990 Oct;7(4):477-84) and also, stimulate your adrenal glands, increase your body temperature, raise your heart rate, etc i.e. they mimic the "Fight or Flight" response quite well. Cimaterol, however may stimulate the beta-1, 2, and 3 receptors while clen only stimulates the beta 2 and 3 receptors. This may cause increased fat burning by cimaterol when compared with clenbuterol. Also, a far greater portion of brown adipose tissue is burned with the use of Cim over Clen.

Cimaterol stimulates both lypolisis (burning fat: the release of free fatty acids and glycerol) as well as inhibit lypogenesis (gaining fat: the incorporation of 14C into fatty acids from [14C]glucose) and may even do both more effectively than clen, possibly making it a more potent fat burner. In addition, it stimulates protein synthesis and thus could increase Fat Free Mass via this mechanism (Domest Anim Endocrinol. 1990 Oct;7(4):477-84) while at the same time burning fat. After a couple of weeks, however, the anabolic effects might lessen, as one study showed weight gain (with fat loss& ergo a PURE muscle gain concurrent with fat loss) halted after 14 days (J Anim Sci. 1992 Jan;70(1):115-22.). Energy metabolism has been shown to be greatly increased with Cim as well( Am J Physiol. 1988 Dec;255(6 Pt 2):R952-60). Cimaterol also stimulates blood flow and causes acute mobilization of nitrogen (alanine), significantly increases amino acid uptake in muscles, and mobilizes lactic acid out of muscles (J Anim Sci. 1998 Apr;76(4):988-98.). Thus, it may not have the athletic performance (endurance and possibly speed) decreasing effects of clen (which I´ve written about and referenced studies about previously, so I won´t get into that here& .it´s beyond the scope of this article). This is pure speculation on my part, and Cim may still have some of the performance decreasing effects of clen, but as other beta-andrenergic-agonists like ephedrine don´t, I see no reason to think Cim does (as I haven´t read any studies which indicate this). In any case, alot of the studies I´ve read and compared with those on Clenbuterol seem to indicate that Cimaterol is actually more potent for fat burning than clen is.

It down regulates the beta receptors just as clen does (J Anim Sci. 1992 Jan; 70(1):115-22.) so a 3 week on 1 week off type of schedule may be appropriate, as would the addition of Ketotifen after ever 3 weeks (and not going off the cimaterol& so in 4 weeks on cimaterol, every 4th week you´d be adding in 2-3 mgs of Ketotifen every night before you go to bed). You could also use 50mgs of Banadryl instead of the Ketotifen, in the same manner.

As with any new drug, caution should be taken with this stuff.

Cimaterol, LD50:

     1973 mg/kg (male)
     and 1745 mg/kg (female)

Source: steroid.com