I had the same experience with amphetamine. I think it's an ADHD thing. My doctor started me off on a low dose and I was falling asleep when I took it. We bumpe

I had the same experience with amphetamine. I think it's an ADHD thing. My doctor started me off on a low dose and I was falling asleep when I took it. We bumped it up and I'm working harder to stick to a good sleep schedule. It's mostly subsided, but I do still need the occasional afternoon nap. I didn't have that same experience with methylphenidate. That one was a much more pronounced effect. I felt pretty locked in and it was easy to focus. The downside was I was getting headaches, stomach cramps, I would sweat more and my heart was always racing like I had too much coffee. The amphetamine feels much different. It's more of a chilled out effect where all the noise seems to go away. It doesn't make me feel any smarter, but I do feel less distracted and I'm able to complete boring routine tasks. I wonder if that's why I sometimes get sleepy with it. It's like a relaxation spa for my brain.