My sister has early dementia, precipitated by severe dehydration. In the hospital they found she had been taking multiple doses of otc sleeping pills, so the doctor took her off all pills. She lives alone and can't keep track. Now she says she hasn't slept at all since her pills were taken away. All she wants is her sleeping pills back. She can get quite abusive in her pursuit of her pills. How do we sort all this out? Her doctor said she could take 5mg melatonin, but she says it does nothing for her.