i have been prescribed dexedrine ir 2 10 mg pills in the morning and 1 in the afternoon ive been on this for around 4 years ive tried about every other adhd med out there and this one seems to work best for me. here recently i noticed it not working as good as it use to. i noticed they switched the color and shape of the pill here recently also i dont know if this has anything to do with it or not. does anyone one know what is happening? thanks