I am on 400 mg Seroquel at night to sleep and as an adjunct for treatment resistant depression and bipolar II. At this dose it works well for insomnia and I have not had a bipolar episode for 7 years. However, I do have auditory hallucinations. It seems as if a radio is on in another room that I can just barely hear. Or as if people are having a conversation I can't make out. I have a PhD in Clinical Psychology and an MD in Emergency Medicine.
These hallucinations are not disturbing because I fully know they are a side effect of the medication. I actually try to make out the words or the music.
Ironically, at a higher dose the medication would be less effective for insomnia. But, at this dose it seems to work well. I also assume it is working on the Bipolar II. I only had one Bipolar Episode brought on by a divorce. But, I have never had another one.
For non psychotic patients, the auditory hallucinations can be managed if you know they are due to the Seroquel. For other patients, I assume if hallucinations are part of your symptoms; it can be more difficult.
But if you get these auditory hallucinations, just know they are a side effect and go to bed.