One other thing-when i was taking stimulants that were effective, it still wasn't 100% of the time. It was more like 80%. Their effectiveness is unpredictable. Even with a small dosage, even if i hadn't taken them in months, there are times when i'd take one, and it did nothing.

I researched this a bit and read that acidic food can reduce the effectiveness of stimulants. I do think disgestive health matters a lot. I think i started drinking lemon water in the morning at the same time when the stimulants made me tired, but i'm not 100% sure.