I've been using Afrezza 10 weeks now and it worked really fast in the beginning few weeks. Now I find I need higher and higher doses just to keep my post-prandial blood sugar in normal range. It doesn't bring my high blood sugars down fast, takes multiple doses over 3-4 hours to finally see it decrease. I am coughing a lot, too. That wasn't a problem in the beginning, but now with having to inhale so much, I cough so much more. One day I took a total of 64 units! Does it just work for some people and not for others?