Despite all positive effects of doping on the body they could be dangerous. Possible side effects of anabolic steroids can be avoided by choosing the right form (oral or injectable) and combination as well as by taking reasonable androgenic dosages. It has to be mentioned, that the most side effects of drugs disappear after the cycle is completed. Moreover, many of them can be blocked during the cycle by using respective supplements. Therefore, in order to avoid possible negative consequences one shall pay attention to studying information about the drugs prior to use them.
Ciba reportedly patented boldenone in 1949.  It subsequently developed several experimental esters of the drug in the 1950s and 1960s.  One of these was boldenone undecylenate, which was introduced for clinical use under the brand name Parenabol and saw some use in the late 1960s and early 1970s.  However, it was discontinued before the end of the 1970s.  Subsequently, boldenone undecylenate was introduced by Squibb under the brand name Equipose for veterinary use, most commonly in horses. 
As well as allowing people to lose weight though, methamphetamine also made them feel good and so when it was made illegal, as it was easy to produce, many people started to make it illegally to sell on the streets as a recreational drug. If the takers of this now illegal drug were to learn more about meth and the body they would see that the nice effect it seems to have on the brain, also causes them to become paranoid, irritable and even sometimes aggressive and that they may also start to suffer from insomnia. Although that alone, if people knew, may be enough to stop some people from taking the drug, the fact that it can have even more serious effects on other parts of the body may persuade others not to take it.