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.