Since Clenbuterol is not a hormone compound it has no side effects typical of anabolic steroids. For this reason it is also liked by women. Possible side effects of Clenbuterol include restlessness, palpitations, tremor (involuntary trembling of fingers), headache, increased perspiration, insomnia, possible muscle spasms, increased blood pressure, and nausea. Note that these side effects are of a temporary nature and usually subside after 8-10 days, despite continuation of the product. To say that Clenbuterol use is rampant in bodybuilding right now would be an understatement. Thousands and thousands of athletes are using this drug. I personally know a number of pro football players, foreign Olympic athletes, and professional bodybuilders who are using clenbuterol. In addition, I have received feedback from at least 200 other athletes who have experimented with this novel compound. Generally, the feedback from clenbuterol users is that the drug produces dramatic body composition alterations. One Canadian strength coach compared the results he has seen in athletes using Clenbuterol to what one might experience while using a stack of Anavar and Halotestin. Within weeks of beginning Clenbuterol therapy, many athletes notice a significant strength increase and a dramatic reduction in body fat. The results that occur secondary to Clenbuterol administration seem to occur equally in men and women as well as young and old.