I speak from experience on this. I stopped my last DNP cycle early. I like being a self-experimenter... and I like pushing things to the edge. I had bumped my dose up to 800mg crystal (properly dosed caps) and I was still doing full workouts in the gym. Then I decided to push it one step farther after back day and add 40 minutes of moderately intense cardio. (I had been sailing through the cycle prior to that with minimal problems.) Big mistake. That 40 minutes of cardio was my ticket to No Man's Land. I got off the treadmill... and I was sapped. I drove home... and I could feel myself sinking. My girlfriend took one look at me and said, "You've got to stop." I didn't even need to ask her stop what? I knew. I was lethargic... fuzzy... vacant eyed... and could barely get off the couch. I just sat there and drank water... and knew I had to pull the plug on the DNP cycle because I was sinking fast... whereas a couple hours earlier I was fine.