Some vitamins stimulate dreaming. B6 pyridoxine esp.

And some drugs too. But in a diabetic who suddenly is getting low blood sugar during the night, when they were not dreaming that way before, disturbing dreams or anxiety in the sleep can signal a blood sugar low.

I knew a gal whose husband was sleep walking and going to the kitchen and emptying out cupboards to find food, and he needed his insulin lowered. He often did not remember any of it.

Ambien also will cause sleep eating and sleep walking and some even sleep DRIVING!

There are many things that potentially cause sleep disturbance.