I have tried nandrolone on a few occasions, primarily to limit downstream testosterone metabolites. Each time, I regret it. While on it, I feel like I have a dissociative disorder - like someone else is co-habitating my brain with me. I know, that sounds kinda nuts. I also feel an uncomfortable cardiac stimulation from it - not necessarily that the heart is pounding harder, but it's more "excitable".
Over the last 4-5 months, I have experienced bouts of anxiety and tachycardia that last for an 1-2 hours at a very predictable time of day - around 5PM. When wife saw me checking my Apple Watch in church, with my heart rate in the 90's recently, I realized this episodes may the the same phenomenon I described
here. I previously blamed this on CoQ10, but, I am no longer on it, so I am rethinking things. The episodes can occur on a day on which I did not use nandrolone, but they tend to occur during a time period in which I recently used nandrolone. I am still troubleshooting, but I have enough suspicion about nandrolone to stay away from it (once again).