I am saying a prayer for you and your mother as I send this, that today will be a calm one. We have day help, but at night it's just me and Mom. I'm becoming sleep deprived and stressed out. Of course she suffers too from not sleeping. I have found nothing that is guaranteed to make her sleep at night.
Nothing works consistently.
Carrie, I do not have a sure-fire answer for the sleplessness, but I do want you to know you are not alone as you probably sometimes feel like you are. Thankfully, at this point in our situation my husband is still sleeping most nights, and if he gets up he doesn't roam. Of course, I am in the bed with him which gives him comfort. His mother was more sleepless in her Alzheimers, and we gave her a Benedril tablet at bedtime, or 2 Tylenol. I know when she had to be in a care home the Dr. said the Benedril would not hurt her, if it benefitted her, so it was continued until she could no longer get out of bed.