I seem like anytime I change things up, my body has bad reactions. I have been on TRT Cyp, 200MG a week for years. I've taken deca in the past with no issue's. I wanted to try NPP, so I injected 225MG on Monday. A few hours later the injection site felt sore. The soreness got worse the next few days and seems to be subsiding. The soreness wasn't too drastic, but enough that I felt it. I noticed yesterday I felt run down and lazy. I was going to inject the NPP every 3 days at 225MG E3D and today I am due to for another injection, but wondering if I should hold off until I feel better and start again. I've only had 1 injection so far of NPP. Or is this just my body getting used to a different substance and my immune system is trying to fight it off.