I have tried, and I cannot. They help me fall asleep if I time the crash correctly, but other than I will have trouble falling asleep. If I stop taking them, then I have trouble falling asleep, so I am kind of in a catch-22 lol.
You might be surprised. My first prescribing doctor emphasized that an appropriate dosage wouldn’t disrupt sleep and might even improve ability to get to sleep. He wasn’t right about several other things, but on this he was exactly right. So much so that early on I took a morning nap about an hour after meds kicked in because I couldn’t stay awake. Now with a higher dose I don’t get so lethargic, but I certainly could sleep when the meds are effective, more than I ever could during daytime before.
I guess I am on the wrong dosage then, because when they are in full effect, there is no way I could fall asleep. Stimulants do wonders for my hyperactivity e.g. I turn from Ace Ventura to being able to sit in an office. However, I would never say they calm me down in a mental sense. In fact, they kind of tend to do the opposite sometimes.