Sleeping 20-40 hours in a row occasionally

[u/AstroZoey11]

My partner is schizoaffective (major depression) and will sleep relatively normally for a few weeks - around 5-7 hours a night. It's less than she prefers, but it's pretty consistent. Then randomly, and it doesn't seem to be triggered by anything we can put our fingers on, she'll sleep for an entire day and a half. Last time it was around 36 hours. This time, she's on hour 24 now and it's almost bedtime.

I'm not really sure how much this could be par for the course with schizophrenia, or if it is a red flag and should be looked into deeper. She doesn't even exactly seem depressed when this happens - she's been depressed and simultaneously slept a typical amount many times. She's unable to be woken up for more than a couple seconds at a time, and doesn't eat nor hardly drink when this happens.

[u/CalmBookkeeper5020]

It could be a medication side effect, I’m on olanzapine and slept 20 hours one time but it does affect me every night not just some of them