Talk to Psychiatry on Sleep Problem

My mum has BP issue. She takes tablets for BP and cholestrol as well. The problem is when she goes to sleep, she sleeps peacefully for 1,2 hours. After that her sleep gets interrupted, and she feels like she is sleeping with her eyes closed, but she starts imagining scenarious and stories and next day when she wakes up she thinks that scene or story happened in real. Whats the problem what should we do? Are these hallucinations or what?