Concerta

I’m 60 years old and diabetic for a little over 20 years. Pumping for over a year. Recently started taking concerta. Anyone taking this or similar medication? Does it affect your blood sugar? Concerta has curbed my appetite. I have cut back on amount or skip lunch. Supper is my largest meal that is when I am the most hungry.I seem to be all over the chart without a clear pattern. Meanwhile, I will just have to give it more time to settle. Any thoughts? Thanks.