[Serious] Iranian Ritalin is better than Novartis Ritalin
I don't just say that because I'm some jingoist hirka dirka, but I have first-hand experience with both. StimDate is much better than Novartis' Ritalin. I am a recreational user of Ritalin (I'm bipolar and been to the nuthouse twice over it, so Ritalin is not what I should be taking but I my medication makes me so tired) and I get my stuff off the black market. StimDate costs $20 per 100 tablets. Novartis costs $60 per 100 tablets. All the other brands cost some where in between. Novartis is still good though. The WORST Ritalin is made by India/Pakistan. These fuckers can't make shit, so they should not attempt to make shit. Last time I took Indian Ritty, I was manic for a month and broke several plates and a jar of olive oil.
In South Africa, one of the instant release Ritalin generics is called METHYLPHENIDATE HCL-DOUGLAS (catchy, right?)
When I used to snort the substance, Ritalin didn't feel as potent as the generic. Was a bit annoying to crush too. Orally, I couldn't really tell the difference.
I had a little milligram scale. I don't recall the exact mass, but I remember the Ritalin tablet being considerably heavier than the generic.
Could be the different types of binding agents, preservatives or whatever else a pill needs to be a pill besides the active pharmaceutical ingredient not working well in your system.
Otherwise, try to take it easy. As far as I recall, stims and bipolar disorder don't play nice long term. One of my closest friends who had the disorder sadly never managed to kick his coke habit.