I didn't show any side effects...
...just pretty good strength gains that allowed me to improve my lifts, which in turn are leading to harder muscles and added size (to quantify this is difficult...I added 20 lbs to bench press--I'm up to 145lbs, almost my body weight, can now do a chin from dead hang, and can squat 265 lbs). My biceps are larger and more defined, but still no 'peak'.
This is not an overnight solution, however. If you want a quicker uptake that might also increase the possibility of side effects, you should apply it transdermally...I did not, however, try this method, because I am not looking for quick gains...and don't want the sides at all.
I did stick to the dosage range recommended, however, I started taking it once, one hour before my workouts, 100mg, instead of the 50mg 3 times daily. This works fine for me.
This could be a placebo effect....but then, people have noticed a physical change in me over the past 3 weeks. My pecs are pushing out!
I can't say if it helped me lose fat or not because I do 60 minutes of cardio 5 days a week...I haven't noticed specific fat loss due to the nor-4, but...I AM A LOT HARDER, which for me is a milestone. My veins show more too. Like...my arms and thighs are now pretty vascular, especially after a workout.