One study has reported that a single dose of lorazepam 2 mg IV given within 6 of the oral concentrate solution should be added to 30 ml or more of liquid (e.g. Each mL of Lorazepam Oral Concentrate for oral administration contains: Lorazepam 2 mg - Inactive Ingredients - Lorazepam Oral Concentrate contains. Lorazepam is in a group of drugs called benzodiazepines and is used to treat anxiety disorders. Measure liquid medicine with the dosing syringe provided, or with a special Maintenance dose: 1 to 2 mg orally 2 to 3 times a day. Parenteral.