I've recently started treatment with lisdexamphetamine and I feel like sometimes there's certainly a sense of being less restricted than when I'm not using it. And sometimes I feel a sense of (maybe unsubstantiated) confidence that I don't have without it.
Sometimes that's for the better, and sometimes it might be for the worse. I also feel very interested in doing good work, and learning more. Which means I'm not the most social person on our team, although I think I'm well enough liked, I'm not after-work friends with that many of them.
The social aspect is probably the most important aspect of success at work (moving up, political support, getting that money etc), but for now I'm really enjoying being able to focus my energy on a task and not get distracted by every little sound,thought or movement happening around me.