I don't think it's still manufactured, and maybe it's unrelated to this current situation, but around 8-15 years ago, one of the manufacturers of generic Adderall XR did something that made it much less effective. It was obvious which ones were theirs, because they were the only company that put theirs in blue capsules.

Subjectively, it felt about half as effective as anyone else's. There were many, many forum discussions at the time from adults taking it as well as parents of kids who'd received it and noticed a big difference.

It was especially frustrating because of all the rigamarole one has to deal with to get the medication in the first place. To not have it work and also have to wait another month to get one that does is ridiculous.

I submitted a complaint to the FDA about it at the time. Never even got a form letter back. It's caused me to avoid generic drugs where possible ever since because if that can slip through, what else can?

I assumed at the time it was some difference in the capsule itself or the delayed-released mechanism, as opposed to the active ingredients being different.