I decided to take a few months off my meds. Talked to my doctor and started back on November 12th 2014 and switched from the 10mg XR SHIRE to Barr IR 10mgX2 a day. I still feel like Adderall these days is like taking Ephedrine any more. I attempted to experiment and gave several coworkers a couple doses. One girl who used to take 10mg IR years ago for weight lose said she thought it was very different feeling from adderall a few years ago. Another friend was sedated and almost asleep within an hour. Interesting. I dug deep and found that the FDA had issued letters to CorePharma and Barr about Quality and formula changes without notice to public. I read a letter from Barr when Teva purchased them about changes from the original Shire IR formula (around late 2009 when ALOT of forum complaints started about Adderall no longer working on them). I find Teva not having such an extensive purification process as Shire on the IR formula thus creating a greater Acidic balance in their pills and greatly changing how the D-Amp is metabolized. Yes, Dysphoric, it's not a Tin Foil Conspiracy. It's all true,money making (and saving) corporate changes to a once great medicine. NOW...go get a script for Vyvanse and enjoy quality D-amp like the old Shire Addy (just forget about a rush IR abusing it, but it's smooth like its 2002 again).