I've had some patients who have recently got their insurance companies to cover the cost of brand name Concerta simply because the generics have been unavailable or less effective.

The tricky part is that some peoples' bodies or brains don't have problems or detect differences between the generic and name brands and some do. It is probably sensitivity to how much drug is going in how fast, rather than issues with additives or other ingredients that differ,

I know that Reddit usually has many ongoing discussions about which stimulants seem to work effectively or not, but again, what some individuals report for themselves may not necessarily be applicable to your brain and receptors.