Schizoaffective disorder, if my understanding is correct, is described as lying somewhere between schizophrenia and depression or bipolar disorder.
Now it has long been known that opioids are somewhat effective in treating schizophrenia and indeed was sometimes prescribed before the neuroleptics were discovered. So were you using opioids as a form of self-medication?
Buprenorphine has been shown effective in treating schizophrenia:
The antipsychotic potency of the partial opiate agonist buprenorphine was evaluated in 10 neuroleptic-free schizophrenic patients suffering from frequent hallucinations, delusions, and severe formal thought disorders. Buprenorphine had a pronounced antipsychotic effect, which lasted about 4...
pubmed.ncbi.nlm.nih.gov
Now aplrazolam is used to treat anxiety and as I previously stated, long-term conditions such as GAD and unipolar depression and although it has been shown to promote mania in certain cases, it has been trialled in the treatment of certain forms of bipolar disorder:
The 'off‐label' effect of alprazolam on depression has not been systematically evaluated.To determine the antidepressant effect, including tolerability and acceptability, of alprazolam as monotherapy for major depression, when compared to placebo ...
www.ncbi.nlm.nih.gov
In an open-label study of alprazolam in five bipolar-I depressed patients, three patients remitted completely, one failed to respond, and one responded transiently, based on the Hamilton Rating Scale and Beck Depression Inventory scores. Further studies of alprazolam as an antidepressant are...
pubmed.ncbi.nlm.nih.gov
If that's the case, I can see the reasoning behind the doctor's choice. The neuroleptics can cause terrible side-effects and so this sounds much more like an attempt not to make any depressive symptoms worse.
I could not find any more robust data but I think it perfectly reasonable to ask the doctor about this. Treatment generally works better if doctor and patient are on the same page. But generally, doctors don't like explaining too much. I don't quite know why.
But as a bipolar disorder sufferer, I would tell the doctor if you are or were using stimulants as self-medication for depression. I suspect your doctor might have guessed because generally speaking, if you are caught using street drugs, obviously they will be concerned that you might misuse your prescribed medication.
If the alprazolam is prescribed to treat depression, an effective dose is surely required. Other benzodiazepines have been used to treat depression but only the US still uses one; specifically alprazolam.
If the higher dose of alprazolam means you don't need the modafinil then it may be a useful tool in discussion. After all, it's one less drug and so one less possible interaction. Frankly, any more than two different medications and NOBODY understands the interactions. It might alter the metabolism of the other medications increasing or decreasing plasma concentrations and clearance times.
But I just take the oxycontin I am prescribed as directed by my doctor to manage chronic pain and clobazam as prescribed to treat myoclonus. I totally avoid all other drugs and alcohol as well. I was given a neuroleptic but I was simply asleep for most of the time and groggy when awake. So I stopped after a week. I manage the bipolar myself which means having a routine, avoiding stressors (where possible) and trying to remain positive. I know, it's easier said than done BUT I received proper counselling which had enormous value.
You mentioned auditory hallucinations. Is that your own description or one applied to your condition? Because it's a very vague term and I am lead to believe that with schizophrenia, voices that are experienced which is disturbing enough but sometimes voices that are malign which I imagine must be dreadful.
I hope this of some help.