I am on my 3rd week of low dose NPP (100mg/wk) and 200mg/wk Test E. I've taken Deca before and had very similar side effects that I'm experiencing right now. Real bad anxiety and emotional insecurity. I was able to wean off Sertraline about 3 months ago and was fine up until the cycle. Since restarting Sertraline 25mg/day, I've felt so much better. Almost like a light switch went on with my emotions. No more racing heart at night and anxiety has greatly diminished. Is there any correlation with Nandrolones and lowering serotonin? I can definitely feel it effects my serotonin and cortisol level immensely. While I do like the NPP for joint health, I'm not liking the mental side effects. I'm even taking an on cycle support to keep prolactin and estrogen in check.