Medicine guide

Ativan

4 mg/mL · Injection

  • Prescription only
  • Controlled substance · CIV
  • Benzodiazepine
Active substance
Lorazepam
Made by
Hikma Pharmaceuticals USA Inc.

Quoted from the official source. Not yet reviewed by Mediclarum — the leaflet in your pack is authoritative.

What it is for

Medicine groupPain, sleep, mood, epilepsy and the brain

This information is not included in the verified source. Open the official leaflet

How it works

From the US prescribing label for the same active substance (LOREEV XR). It describes the substance, not this exact product.

Lorazepam exerts its effect for the treatment of anxiety disorders through binding to the benzodiazepine site of the gamma-aminobutyric acid-A (GABA A ) receptors in the brain and enhances GABA-mediated synaptic inhibition.

Half-life7.2 h
Mostly cleared after≈ 36 hfive half-lives — our arithmetic
How it leaves the body

Lorazepam glucuronide is excreted in the urine.

With food

Effect of Food Administration of LOREEV XR with a high-fat and high calorie meal did not have a significant effect on exposure of LOREEV XR.

Quoted from the prescribing label, sections “Mechanism of Action” and “Pharmacokinetics”. DailyMed · 2025-10-08

Safety of the active substance

From the US prescribing label for the same active substance (LOREEV XR). It describes the substance, not this exact product.

Serious warning

WARNING: RISKS FROM CONCOMITANT USE WITH OPIOIDS; ABUSE, MISUSE, AND ADDICTION; and DEPENDENCE AND WITHDRAWAL REACTIONS Concomitant use of benzodiazepines and opioids may result in profound sedation, respiratory depression, coma, and death.

Must not be used by
  • LOREEV XR is contraindicated in patients with: hypersensitivity to benzodiazepines or to any of the ingredients in LOREEV XR [see Warnings and Precautions ( 5.7 )]. acute narrow-angle glaucoma Hypersensitivity to benzodiazepines or any ingredients in LOREEV XR ( 4 ) Acute narrow-angle glaucoma ( 4 )
Most common side effects

The most frequent adverse reactions to lorazepam tablets were sedation (15.9%), dizziness (6.9%), weakness (4.2%), and unsteadiness (3.4%).

Quoted from the US prescribing label for the same active substance. Your own pack’s leaflet is the authority for your product. DailyMed

Same active substance, strength and form in other countries

Matched on active substance, strength and kind of form only. This is not a statement that the products are equivalent or interchangeable: other ingredients, release and approved uses can differ — ask a pharmacist before swapping.

Medicine passport: one printable page to show a pharmacist abroad

CanadaNo exact match for this strength and form

Details

Made byHikma Pharmaceuticals USA Inc.
Active substanceLorazepam
Used inPain, sleep, mood, epilepsy and the brain
Strength4 mg/mL
FormInjection
RouteIntramuscular; Intravenous
Packs10 VIAL in 1 CARTON / 10 mL in 1 VIAL · 25 VIAL in 1 CARTON / 1 mL in 1 VIAL
NDC0641-6002
NDC0641-6003

Source: NDC Directory · 2026-09-13 · not reviewed by a clinician

Source: US Food and Drug Administration, NDC Directory. Reuse terms: US government work (FDA).

Other strengths and forms

5 products are sold under this name. Grouped by form; a number on a strength means several companies make it.

Same active substance

These contain the same substance. That does not mean one can replace another — ask a pharmacist.