Peak concentrations in plasma occur approximately 2 hours following administration. The peak plasma level of Lorazepam from a 2 mg dose is approximately 20 ng/mL. The peak plasma level of Lorazepam from a 2 mg dose is approximately 20 ng/mL. -For optimum effect, intramuscular drug should be administered at least 2 hours before the anticipated operative procedure. -Narcotic analgesics should be administered at their usual preoperative time. If you miss a dose, take it as soon as possible and then continue taking it every four hours as usual, however, do not take two tablets together to make up for the missed dose, as it can result in unwanted side effects. Recommended dosage Lorazepam is taken several times daily by mouth or injected to treat anxiety. Dosage ranges from 1–2 mg taken either every 12 or every eight hours. Lorazepam is a prescription medical treatment used to manage anxiety. Lorazepam belongs to a class of drugs known as benzodiazepines which act on the brain and nerves (central nervous system) to produce a calming effect that relieve symptoms of anxiety. Thank you for clarifying, A typical dosing schedule for lorazepam is 1 mg three times daily. It can be given in higher dosages, but it is a medication that can become addictive if used long term. By intramuscular injection, or by slow intravenous injection. For Adult. 25–30 micrograms/kg every 6 hours if required; usual dose 1.5–2.5 mg every 6 hours if required, intravenous injection to be administered into a large vein, only use intramuscular route when oral and intravenous routes not possible. Each Ativan (lorazepam) tablet, to be taken orally, contains 0.5 mg, 1 mg, or 2 mg of lorazepam. The inactive ingredients present are lactose monohydrate, magnesium stearate, microcrystalline cellulose, and polacrilin potassium. A few times every week I would get only two or three hours of sleep a night. Four months ago, I was lucky if I slept six hours even one night a week. Four months ago, I was lucky if I slept six hours even one night a week. Medscape - Anxiety, status epilepticus, sedation-specific dosing for Ativan, Lorazepam Intensol (lorazepam), frequency-based adverse effects, comprehensive interactions, contraindications, pregnancy & lactation schedules, and cost information.