One of the possible reasons why you may not be getting the same amount of relief with Sandoz (EON) as you might with Corepharma, is often due to the fact that each manufacturing company uses a different set of binders/fillers (inactive ingredients). This is basically the extra fluff that holds the tablet together. Some companies use more of it than others, and some even go so far as using cheaper genetically modified substances that our body's can't metabolize (yet it's what's covering up the actual active substance, blocking it being released in it's normal therapeutic quantity/bioavailability). This is what I believe is occurring in patients who report having similar issues.
Have you also tried asking your doctor to request Corepharma on the prescriptions he writes for you?
I just wanted to add that I always suspected Aurobindo made fake Adderall, my doctor writes do not dispense on all my prescriptions so I don’t get their medication.
Part of the reason we’re having an Adderall shortage right now as I believe they discontinued making it, they probably had to because it was so bad, but look at this from the FDA today. They were making bad medication. If you get weird generic meds, please take a minute and fill out an FDA medwatch report online or call. Sometimes they really are bad medications and these companies will keep selling them if nobody stops them.