From reading this article, it should be quite easy to ascertain that clenbuterol is very precise and could be classified as “delicate” in terms of how to properly use. Clen should be cycled properly for not only safety and avoidance of short and long term side effects but that of efficacy as well. There are several possible side effects associated with clenbuterol use . Keeping all of this in mind, men should not exceed 140 mcg’s per day of clenbuterol use and women should not exceed 120. These doses should also not exceed 2 weeks of continuous use. Clenbuterol users should not use clen more than 16 weeks per calendar year. After completing a course of clen, a user should take 8-10 weeks off at the minimum although a longer rest period would be preferred.