Lorazepam Administration Guidelines

Adult Dosing

The American Academy of Family Physicians recommends 0.5-1 mg orally/sublingually four times daily as needed, with a maximum of 4 mg in 24 hours, for anxiety and agitation 1
The British Medical Association suggests reducing the dose to 0.25-0.5 mg in elderly or debilitated patients, with a maximum of 2 mg in 24 hours 1
The American Society of Clinical Oncology recommends 1 mg subcutaneously or intravenously stat, up to 2 mg maximum, for delirium management 2

The American Academy of Pediatrics recommends 0.05-0.10 mg/kg intravenously, given over approximately 2 minutes, with a maximum single dose of 5 mg, for status epilepticus 3, 4
The American Academy of Pediatrics suggests intravenous doses of 0.05-0.10 mg/kg, given over 2-3 minutes, with a maximum single dose of 5 mg, for sedation/anxiolysis 5

The American Academy of Pediatrics warns of an increased incidence of apnea when combining lorazepam with other sedative agents, and recommends monitoring oxygen saturation continuously 5, 6
The American Society of Clinical Oncology notes that subcutaneous injection may cause tissue irritation 2

The British Medical Association recommends reducing the dose by 50% in elderly/debilitated patients 1
The American Society of Clinical Oncology suggests that dose adjustment may be necessary in patients with renal impairment 2
The American Society of Clinical Oncology recommends using lower doses in COPD patients due to respiratory depression risk 2

The American Academy of Sleep Medicine suggests that redistributing the dose more evenly throughout the day provides steadier plasma levels and may reduce breakthrough anxiety in patients with anxiety, with lorazepam having a 30-40 hour elimination half-life 7
Research demonstrates that three-times-daily dosing (0.5 mg three times daily) can improve daytime anxiety symptoms compared to single evening dosing, with reduced tension in the evening after daytime administration, although the specific study details are not provided 7