Trenbolone is as strong of an androgen as it is an anabolic, where its androgenic strength is also that of five times the strength of Testosterone. With an androgenic rating of 500, it is commonly known that Trenbolone can and does exhibit increased feelings of irritability and aggression in most users. This side effect is very dose-dependent, with more pronounced aggression seen in higher (and often unnecessary) Trenbolone doses. Various individuals will also not experience tis side effect at all as a result of their individual response. Users who are known to have short temper and anger-control issues prior to Trenbolone use should exercise extreme caution, as the use of Trenbolone can and will without a doubt cause an amplification of these traits. Such individuals should avoid Trenbolone use as a responsible decision. As a general overall rule, any and all Tren users should always exercise caution and ensure that a proper stable psychological state is always maintained, and that the user be constantly aware of their actions at all times. Appropriate discipline is of the utmost importance when utilizing any anabolic steroid, especially Trenbolone (and special considerations must be taken at higher doses). It must be made crystal clear to the reader that the use of any type of drug is absolutely no reason for any individual to absolve themselves of all personal responsibility, and shift the blame onto the drug in question (in this case, Trenbolone) when the user commits a regrettable action. Remember this at all times!
Stephan Bonnar and Josh Barnett , mixed martial arts (MMA) fighters from the UFC and PRIDE Fighting Championships , have also tested positive for the banned substance.  After the World Extreme Cagefighting show on January 20, 2006 Muay Thai turned MMA fighter Kit Cope also tested positive for boldenone.  Following the Strikeforce card on June 22, 2007 former PRIDE and UFC fighter Phil Baroni tested positive for boldenone, as well as stanozolol .  At a K-1 WGP event in Las Vegas on August 17, 2007 two fighters, Rickard Nordstrand and Zabit Samedov , both tested positive for boldenone.  Alexandre Franca Nogueira tested positive for boldenone in July 2008.