I was just about to say the same thing. Where this 80% figure comes from is beyond me. It seems that people believe just because they know something, it must be true. Well in the absence of proof, I will take the word of a pharmaceutical company making billions of dollars, and the regulating body of these billion dollar companies (the FDA), over "hundreds of posts" from anonymous bloggers saying the generic is weaker.
The burden of proof is on the naysayers, and I have yet to see a study showing that generic formulations are not bioequivalent to their brand name counterparts. So dig thru Google Scholar by all means and prove me wrong, but I have yet to see anything even remotely suggesting what alot of people are suggesting
This is what I'm talking about. You are talking about amphetamine. A generic version of amphetamine is still amphetamine. It's not some cheaper version of amphetamine. In fact, the formulation is the same in the case Adderall (salt ratios identical), so the only difference is the inert ingredients in the pill. Perhaps these inert substances are delaying absorption, but it's a real stretch saying generic amphetamine is good because you can eat and sleep on it, whereas brandname amphetamine is horrible as it stunts hunger and keeps you awake. Um, that's amphetamine for you.
I'm not saying YOU don't believe there's a difference, but there isn't. So take that as an assurance of just how powerful the human brain's power to direct beliefs can be
I'll bet $1000 you started off on brand name Aderall and couldn't eat or sleep at first, so eventually you switched to generic when you had been on the meds for a month or two... now tolerance is rising at this stage, so when you start on the generic version, your perception is that it's different. You reason that because you can eat and sleep better now, the generic must be different. If it was the other way around (you started on generic meds and switched to brand name) your belief would be reversed. As I said, its all in your head