Haldol is very unlikely to induce false confessions - but with the brain strange reactions due to genetic quirks can’t be ruled out.
Still, this paper states that ideally meds like haldol (halperidol) blocks 72% of the D2 dopamine receptors. I’m no MD so I wont swear to it, but I would think that would slow you down quite a bit.
Antipsychotic Medications - StatPearls - NCBI Bookshelf
First-generation antipsychotics are dopamine receptor antagonists (DRA) and are known as typical antipsychotics. Second-generation antipsychotics are serotonin-dopamine antagonists and are also known as atypical antipsychotics. This activity outlines the indications, mechanism of action, safe...www.ncbi.nlm.nih.gov
From some experience I think any discussion needs to be careful about mixing up anti-psychotics, sedatives, anti-depressives etc etc with the actual condition of psychosis
A psychosis involves by definition, a break with reality.
Psychosis refers to a collection of symptoms that affect the mind, where there has been some loss of contact with reality. During an episode of psychosis, a person’s thoughts and perceptions are disrupted and they may have difficulty recognizing what is real and what is not.
My opinion only - sedatives might be given so the person can get rest and recover. Anti-psychotics to prevent risk of relapse and of course related risk of depression. The idea that they would cause false confessions seems cart before horse.
All of that said, when someone is in a psychotic state, it is in my experience fairly obvious to a 3rd party observer, especially a professional - what is real and what is not.
Understanding Psychosis
This fact sheet presents information on psychosis including causes, signs and symptoms, treatment, and resources for help.
www.nimh.nih.gov
MOO