I use the U 100 pen, Katie
Maybe that's why I was instructed to go up and down by 2 units?
That's why I always say, check with your doctor.
What works for me is no guarantee of what will work for you
And it sounds like your pen is twice the strength of mine
Maybe the only difference between what your doctor gives out, and what mine gives out, are what pens they get as samples from their pharmaceutical reps!!!