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Are you talking about haloperidol? It doesn’t really get used a sedative in emergency psychiatric situations but often gets paired with benzodiazepines. Sometimes one or the other. Sedative would more typically be Ativan. To be clear haldol does have some sedative effects but it is not typically used as a first line sedative in inpatient psychiatric settings; it’s a poor choice for this purpose because it has a fairly slow onset for sedative effects to be seen (~15-20m for many individuals)
Haloperidol is used for acute psychosis and agitation. Ativan is used for sedation. Care has to be taken because benzos/ativan can worsen delirium, eg in an elderly patient, thus the use of haldol if they are agitated. Or you might use diazepam if you are intending a chemical restraint as this lasts longer than ativan. But this metabolizes via liver so you again have to be careful about pt, late stage alcoholic would get ativan bc metabolic pathway is renal. Additionally ativan alone be best fit for someone detoxing from alcohol who is agitated as the underlying cause of their agitation better targeted by benzos than haldol. Knowledge of pt is key. Of course that info is not always available unfortunately
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3298219/
Project path explains rationale behind psychopharmacology for emergency treatment of agitation better than I can
Thankfully in the past 10 years I’ve seen a decline in practitioners prescribing seroquel for sleep disorders but that’s entirely anecdotal and based only on my small geographic area unfortunately, not sure of any literature to support that this is actually declining. And unfortunately in the USA i believe it’s still somewhat regularly used as a chemical restraint in long term nursing care for geriatric populations despite indications for other medications being potentially better choices but I can’t speak much to that as it’s not my practice area or population