Management of Acute Agitation in Patients on Aripiprazole

Preferred PRN Medications

The American College of Clinical Pharmacology recommends using lorazepam 1-2 mg PRN as the first-line agent for acute agitation in patients already on standing antipsychotics like aripiprazole, due to its demonstrated efficacy at reducing agitation scores at 30, 60, and 120 minutes after administration 1, 2
Lorazepam is the preferred PRN medication for acute agitation, with a starting dose of 1 mg PO/IM/IV/SC PRN, repeating every 1 hour if needed, and a maximum dose of 2 mg per administration 1, 2

The dosing protocol for lorazepam should be adjusted in elderly, frail, or patients with respiratory conditions like COPD, with a reduced dose of 0.25-0.5 mg due to excessive sedation risk 1

If lorazepam is contraindicated or ineffective, a single antipsychotic PRN can be used, such as haloperidol 0.5-1 mg PO/SC/IM PRN every 1 hour as needed, with a reduced dose of 0.25-0.5 mg in elderly/frail patients 2
Olanzapine 2.5-5 mg PO/SC/IM PRN can also be used, with a reduced dose in elderly and hepatic impairment 2

Monitor for paradoxical agitation with benzodiazepines, occurring in approximately 10% of patients, and increased fall risk with both benzodiazepines and antipsychotics, especially in elderly or frail patients 1, 2
Avoid regular, long-term benzodiazepine use, as this leads to tolerance, addiction, and cognitive impairment, and never combine high-dose olanzapine with benzodiazepines due to oversedation and respiratory depression risk 1, 2

Antipsychotic polypharmacy increases side-effect burden, including Parkinsonian symptoms, hyperprolactinemia, sexual dysfunction, sedation, cognitive impairment, and diabetes mellitus 3
Drug-drug interactions between risperidone and other antipsychotics affecting the same metabolic pathways can lead to unpredictable plasma concentrations and exacerbated side effects 3