I haven't seen it used as truth serum anywhere online...
Seriously, would appreciate if someone had experience of how widespread antipsychotics are in prisons/jails.
From some basic googling, I found this report on a specific prison:
"A total of 46 out of 336 prisoners (13.7%) had been prescribed antipsychotic medications; 29 of the 46 patients (84.8%) were also prescribed other psychotropic medications at the same time. Quetiapine was the most frequently prescribed antipsychotic and was also the most likely to be prescribed for off-label indications. Less than one-third of all antipsychotic prescriptions were for psychotic disorders."
From some additional browsing, it seems that anywhere between
15 to 20% of male prisoners are given antipsychotics. It seems to be a go-to response to aggression/tantrums/mental health concerns.
Background Mental illness is highly prevalent among prisoners. Although psychotropic medicines can ameliorate symptoms of mental illness, prescribers in prisons must balance clinical needs against risks to safety and security. Concerns have been raised at the large number of prisoners reportedly...
bmcpsychiatry.biomedcentral.com
I didn't find any research correlating antipsychotics with false confessions.
I am not a doctor, I only know Google.