Evaluation of haloperidol decanoate initiation dosing in inpatients with serious mental illness.

The mean oral dose of haloperidol before decanoate initiation was 20.7 mg, and the mean initial dose of haloperidol decanoate was 178 mg.

Of those who received doses outside of the recommended range, 41.5% received a dose less than 10 times the oral haloperidol dose, while 10.9% received a dose exceeding 20 times the oral dose.