I just started generic Focalin 5 days ago, 5mg once a day. It makes me feel wired, like I've had too much caffeine. I can't tell yet if it's helping with my concentration, and it doesn't hurt my mental state as far as I can tell, but I'm wondering if this physical jittery feeling will fade over time. I can't imagine feeling wired like this every day.
For Vyvanse I feel super wired every time we increased the dose, but it would go away after a week. Pretty soon it felt like taking nothing, unless I missed a day, then it felt like the world was super distracting and my brain was throwing errors whenever I tried to speak my thoughts.