Лоразепам

Quick links to important sections

Лоразепам

Medically reviewed

Marina Burgos

Last updated on 10/01/2026

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Лоразепам

What is Lorazepam? An Overview

Property Description
Active Ingredient Lorazepam
Form Primarily Oral Tablets and Solutions
Pharmacological Class Benzodiazepine / Anxiolytic
Common Use Short-term relief of severe anxiety
Origin Synthetic Chemical Compound

What is Lorazepam and What Pharmacological Class Does it Belong To?

Lorazepam is the International Nonproprietary Name (INN) for a synthetic prescription medication that belongs to the benzodiazepine class of drugs. It acts as a central nervous system (CNS) depressant, meaning it slows over-activity in the brain. As a benzodiazepine, it is used to treat anxiety, a classification that means the medicine is specifically designed to have a calming effect on the nervous system.


Composition and Available Pharmaceutical Forms

The active ingredient in this medication is the compound Lorazepam, which is available primarily in oral forms such as tablets and solutions, and as an injectable solution for acute care. Lorazepam is a chemically synthesized substance and is the sole active ingredient responsible for the therapeutic effect. The common pharmaceutical forms allow for convenient and effective oral administration. The chemical structure and identity confirm its synthetic origin.


What is the General Therapeutic Purpose of Lorazepam?

Lorazepam is prescribed for its anxiolytic (anti-anxiety) and sedative properties, generally to manage severe or debilitating anxiety and anxiety-related sleeplessness. Its core therapeutic purpose is centered on producing a rapid calming effect for short periods of time. The medicine is intended for short-term use to control episodes of excessive worry, tension, or panic when these symptoms significantly interfere with a person's daily functioning.

What side effects are possible with Лоразепам?

Possible Side Effects and Safety Information

The official safety documentation for Lorazepam, as defined by regulatory authorities, centers on adverse reactions stemming primarily from its central nervous system (CNS) depressant activity.

Adverse Reaction Classification

Side effects are categorized by frequency in regulatory labeling. The most frequently observed reactions are classified as Very Common, including sedation, drowsiness, fatigue, and general lassitude. Reactions considered Common include unsteadiness (ataxia), dizziness, and muscle weakness. Less frequently reported effects (Uncommon to Rare) may involve the gastrointestinal system (e.g., nausea, constipation), visual disturbances, or dermatological reactions.

Serious Adverse Reactions and Safety Constraints

Official labeling documents the potential for serious adverse reactions. These include severe respiratory depression, especially when used concurrently with opioids, which is noted to significantly increase the risk of profound sedation and adverse respiratory events. Acute hypersensitivity reactions, such as anaphylaxis and angioedema, are also documented safety concerns. Furthermore, the label notes the potential for suicidal ideation, particularly when pre-existing depression is unmasked or worsened.

Population-Specific and Duration-Related Safety Notes

The risk of developing physical and psychological dependence is a major safety pattern noted in regulatory texts, with the risk increasing with higher doses and longer duration of use. Older adults and individuals with existing severe respiratory or hepatic impairment are explicitly noted to be more susceptible to the sedative effects, unsteadiness, and potential for adverse outcomes, reflecting a specific safety consideration for these populations.

Overdose and Emergency Response

Lorazepam overdose is officially characterized by a spectrum of Central Nervous System (CNS) depression. Regulatory documentation describes common manifestations as increasing lethargy, somnolence, confusion, ataxia (unsteadiness), and depressed reflexes. Over-exposure may progress to severe and life-threatening conditions, including stupor, coma, respiratory depression, and hypotension.

When to Seek Immediate Help

Government regulatory guidance explicitly mandates that individuals seek immediate medical attention or emergency medical care for any suspected overdose or if severe symptoms—such as profound sedation, difficulty breathing, or loss of consciousness—become evident. The official prescribing information carries a serious warning regarding the risk of death when Lorazepam is used concurrently with opioids or other CNS depressants, necessitating urgent intervention.

Management is focused on supportive care, including the maintenance of a patent airway and continuous monitoring of vital signs. While the antagonist Flumazenil is available to reverse sedative effects, regulatory documents advise caution regarding its use due to the risk of precipitating seizures/convulsions. Specific overdose considerations note that elderly patients are at increased risk for profound drowsiness and unsteadiness.

Therapeutic Uses of Лоразепам

What Лоразепам Treats: Main Uses and Benefits

Lorazepam is a medication commonly used for acute, short-term symptomatic support across several key therapeutic areas where symptoms may be intense or disruptive. It is generally applied in settings where additional symptomatic support is needed to address overwhelming physical and emotional distress. Therapeutic uses include help with anxiety, anxiety-related sleeping problems, and application as a premedication to induce relaxation before medical procedures.


Key Symptom Domains

Lorazepam is applicable in clinical settings that involve acute or unstable symptom patterns, such as the urgent control of continuous seizures (status epilepticus), the management of severe agitation in acute clinical states, and easing symptoms of anticipatory fear and tension before medical procedures. This medication primarily addresses symptom clusters that may become intense or disruptive, providing supportive relief that helps patients cope more steadily with difficult episodes.

“This medication is relevant in contexts marked by increased discomfort or tension where short-term symptomatic assistance is appropriate.”

The supportive benefit contributes to improved comfort during symptomatic periods and assists with maintaining a sense of stability when symptoms are more noticeable.


Quick Fact

Quick Fact: Support for Acute Symptom Clusters

Lorazepam plays a role in managing symptoms related to heightened physiological activity, often used during phases when symptoms become temporarily overwhelming. It provides supportive relief when symptoms interfere with routine activities, contributing to easing the overall symptom load.

Eligibility and Restrictions for Use

Who can and cannot use Lorazepam?

Lorazepam (Лоразепам) eligibility is defined by strict regulatory criteria across age, comorbidity, and physiological status, ensuring use remains within officially established safety parameters.

Who Must Not Use This Medicine (Contraindications)

Official labeling mandates that Lorazepam must not be used by patients with specific medical conditions. These absolute contraindications include known hypersensitivity to any benzodiazepine or component of the formulation, acute narrow-angle glaucoma, myasthenia gravis, and severe conditions such as severe respiratory insufficiency or sleep apnea syndrome.


Population and Age Restrictions

Population Group Eligibility Status
Adults (18+) Generally eligible for labeled uses.
Older Adults Eligible, but initial dosage must be reduced and use requires close monitoring.
Children (< 12 years) Oral use for anxiety is not recommended; safety and efficacy are not established for this age group.
Severe Hepatic Insufficiency Contraindicated or restricted due to risk of worsening liver function (encephalopathy).
Pregnancy/Lactation Not recommended, particularly in the first and third trimesters, due to risk of fetal harm and neonatal effects.

Conditional Use Requirements

Patients with renal impairment or non-severe hepatic impairment are eligible but require frequent monitoring, with dosage often requiring careful adjustment. Individuals with a history of substance dependence must use the medicine only under strict surveillance due to elevated risk of abuse and physical dependence.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official regulatory profile for Lorazepam is defined by two primary interaction domains: pharmacodynamic synergism and inhibition of metabolic clearance.

Pharmacodynamic Interactions

Classification Official Regulatory Documentation
Medicinal product categories with documented interactions: Opioids, other benzodiazepines, barbiturates, antipsychotics, sedative/hypnotics, anxiolytics, and sedative antihistamines.
Interaction-related restrictions: Co-administration with opioids carries a mandated FDA Boxed Warning due to the risk of profound sedation and respiratory depression. The simultaneous consumption of alcohol (ethanol) is restricted due to additive depressant effects on the central nervous system (CNS).

Pharmacokinetic Interactions

Classification Official Regulatory Documentation
Specific interacting medicines (if explicitly listed): Valproate (Valproic Acid/Sodium Valproate) and Probenecid.
Mechanistic basis of interactions (only if stated in label): Glucuronidation inhibition, resulting in increased Lorazepam plasma concentrations and reduced clearance.
Interaction-context constraints: The Lorazepam dosage must be reduced by approximately 50% when co-administered with Valproate or Probenecid.

Population-Specific Interaction Notes

Elderly or debilitated patients may be more susceptible to the enhanced sedative effects and increased respiratory depression risk documented with co-administered CNS depressants, as noted in the official prescribing information.

Mechanism of Action

Molecular Mechanism: GABAA Receptor Positive Modulation

Lorazepam functions as a positive allosteric modulator of the gamma-aminobutyric acid type A ( GABAA) receptor complex, a major inhibitory target in the brain. By binding to a specific site on this receptor, the drug enhances the action of the endogenous inhibitory neurotransmitter, GABA, leading to an increased influx of chloride ions left( Cl^- ight) into the neuron.

Systemic Consequence: Hyperpolarization and CNS Depression

The influx of chloride ions causes the nerve cell to become hyperpolarized, making it less susceptible to excitatory signals. This intense GABA-mediated inhibitory state is distributed across the Central Nervous System ( CNS), leading to a generalized dampening of neuronal excitability and activity in circuits like the limbic system and motor pathways.

Physiological Effects: Reduction of Excitability and Muscle Tone

The resulting CNS depression produces specific functional outcomes: it suppresses the hyper-synchronous electrical firing of neurons and reduces neuronal activity in circuits governing arousal. The mechanism also extends to spinal interneurons, which decreases skeletal muscle tone and contributes to the overall reduction of central excitability.

Pharmacodynamic Limitation: Receptor Tolerance

A key constraint of this mechanism is that sustained exposure can trigger neuroadaptation, leading to GABAA receptor down-regulation or uncoupling. This biological change diminishes the receptor’s responsiveness to Lorazepam over time, resulting in pharmacodynamic tolerance and limiting the durability of the enhanced GABA signaling.

Dosage and Administration Information

How Lorazepam is Used: Official Administration Guidelines

Lorazepam administration is structured according to clinical guidelines that define the route, dose, and duration of use. The medication is available for oral use (tablets and solutions) for routine management and parenteral use (Intravenous (IV) and Intramuscular (IM) injection) primarily for acute or urgent clinical situations.


Standard Dosing and Frequency Patterns

For managing anxiety, the typical adult oral dosing regimen begins with 2 mg to 3 mg per day. The maintenance dose generally ranges from 1 mg to 4 mg daily, administered in two or three divided doses to maintain therapeutic levels throughout the day. Conversely, when Lorazepam is used for insomnia associated with anxiety, the administration pattern shifts to a single dose of 2 mg to 4 mg taken at bedtime. The oral forms may be taken with or without food.


Population Adjustments and Procedural Requirements

Standard instructions require dose modifications for specific populations. Older or debilitated adults are typically started on a lower initial oral dose, often reduced by approximately 50% to 1 mg to 2 mg per day in divided doses. For IV administration, the injectable solution must be diluted with an equal volume (1:1) of a compatible solution, such as Normal Saline, immediately prior to injection. The IV injection must be administered slowly, generally not exceeding a rate of 2 mg/minute. Tablets and extended-release capsules should be swallowed whole to preserve their intended release characteristics.


Duration and Cessation of Use

Treatment with Lorazepam is intended for short periods only, typically not exceeding two to four weeks. Due to the established potential for physical dependence, cessation of treatment must be managed with a gradual dose reduction (tapering) schedule to mitigate the risk of withdrawal symptoms.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Phase 3 Trials: Efficacy and Tolerability

A large-scale, randomized, placebo-controlled trial (RCT) was the foundation for the initial understanding of the treatment. The primary objective was to evaluate the potential impact of the drug on disease progression compared to a placebo.

  • Primary Outcome: Studies investigated whether patient-reported outcomes were affected after 12 weeks of treatment. The study recorded a difference in reported outcomes between the group receiving the study drug and the placebo group.
  • Secondary Outcome: Research explored the effect on symptom duration. Findings from this research were included in subsequent meta-analyses.

Drug Combination Studies

Further research has focused on the drug's use in combination with a standard therapeutic agent. Comparative studies have often assessed lorazepam in acute settings, such as the management of agitation or seizures, against other first-line medications like haloperidol, midazolam, or olanzapine.

  • Safety Profile: The tolerability profile was examined in most adults, with common events including sedation and somnolence.
  • Frequency of Episodes: Research has explored whether the frequency of episodes was recorded as being less in the combination group compared to the group receiving the standard agent alone. Research investigated whether the severity of common side effects was impacted by the combination therapy. A comparative measurement was noted between the two groups.

Long-Term Follow-up and Dosage

Ongoing follow-up studies examined a comparison to other available treatments over a one-year period. These observational studies aimed to describe long-term outcomes; however, the effectiveness of lorazepam in long-term use (beyond four months) has not been assessed by systematic clinical studies.

  • Dose Response: Research documented a correlation between dosage and the time to potential change in condition.
  • Initiation of Treatment: Research examined the effects of starting with a low dose and gradually increasing it, based on a clinician’s assessment. This approach was an area of focus in research related to long-term management. It is not yet clear whether starting with a low dose provides distinct advantages over starting with a higher dose.

Frequently Asked Questions (FAQ)

Common questions about Лоразепам (FAQ)


Q: How quickly does a person generally feel the effects of Лоразепам?

Official information indicates that the concentration of the drug reaches its highest level in the blood approximately two hours after oral administration. This measurement describes the time it takes for the drug to reach its highest recorded level in the body.


Q: How long does the effect of a single dose of Лоразепам usually last?

The average time it takes for the body to reduce the amount of the active drug by half—known as the half-life—is approximately 12 hours. This measurement is a key descriptive factor in determining the general duration of the drug’s presence in the body.


Q: Can Лоразепам be taken for everyday nervousness or stress?

Regulatory labeling indicates that anxiety or tension resulting from the stress of everyday life usually does not require treatment with this class of medication. The drug is typically reserved for more severe or debilitating anxiety.


Q: Is it true that Лоразепам can cause memory issues?

Official safety documentation notes the potential for decreased memory formation as a side effect. In rare instances, a condition described as anterograde amnesia, which is the inability to form new memories, has been documented.


Q: Can taking Лоразепам affect driving or operating machinery?

Official warnings include a strong caution against driving or operating any kind of hazardous machinery until a person knows precisely how the medication affects them. This is due to the potential for side effects such as dizziness, drowsiness, and unsteadiness.


Q: Is it generally expected that a person will need to slowly reduce the dose of Лоразепам before stopping?

Following extended therapy, official documents emphasize that treatment requires a gradual dosage-tapering schedule if discontinued. Abrupt discontinuation is advised against in official labeling to reduce the risk of potential withdrawal symptoms.


Q: Is it typical to take Лоразепам only when needed or on a fixed schedule?

The medication may be prescribed to be taken on a fixed, scheduled basis for consistent management. Official information also notes that it may sometimes be taken on an as-needed (PRN) basis, with the appropriate use determined by a healthcare provider.


Q: Can I take Лоразепам if I also take supplements like melatonin or St. John's Wort?

Official interaction documentation notes that co-administration with the herbal product St. John's wort is associated with an increased risk of central nervous system depressant side effects, such as heightened dizziness and drowsiness.


Q: Does Лоразепам show up on common drug screening tests?

Studies indicate that the specific way Lorazepam is metabolized and processed by the body can potentially interfere with certain common benzodiazepine urine screening tests. This interference may sometimes lead to a false-negative result on the screen.


Q: What does the term 'half-life' mean for a medicine like Лоразепам?

Half-life is a descriptive measurement of time used in pharmacology. It indicates how long it takes for the concentration of the drug in the body to be reduced by half. This is a measure of how quickly the body processes the medication.


Q: Why is Лоразепам sometimes used before a surgery or medical procedure?

The injectable form of the medication is officially indicated for use before certain medical procedures or surgery. Its purpose in this setting is to provide relief from anxiety and produce a calming effect, while also reducing the patient's ability to recall the procedure (an amnesic effect).


Q: Does Лоразепам interact with caffeine?

Official interaction guidelines typically do not document a specific, clinically significant interaction between lorazepam and caffeine. This indicates a lack of documented interaction in official guidelines.


Q: What are the official guidelines regarding the use of Лоразепам in people with kidney or liver problems?

Official guidelines emphasize the need for close monitoring and potential dose adjustment for patients with kidney or non-severe liver impairment. This is due to the body potentially taking longer to clear the drug, which can increase the risk of side effects.


Q: What is the typical time frame for re-evaluating the need for Лоразепам treatment?

Regulatory documents state that the need for continued therapy requires periodic reassessment by a healthcare provider. The maximum period for treatment generally described is four weeks, after which reevaluation is mandated.


Q: What is the meaning of the schedule classification (e.g., Schedule IV) for Лоразепам?

Лоразепам is classified as a Schedule IV controlled substance. This is a regulatory designation that indicates the medication has an established potential for dependence, abuse, and misuse.


Q: Are there any restrictions on travel described for people taking Лоразепам?

Since this is a controlled substance, official government guidance for travel (especially across international borders) details specific requirements. These common requirements include carrying the medication in its original container and possessing a valid prescription or doctor's note for declaration to officials.


Q: Is it safe to consume grapefruit or grapefruit juice while taking Лоразепам?

Lorazepam is metabolized differently from some other similar medications. Official interaction guidelines do not typically document a significant interaction with grapefruit or grapefruit juice.


Q: Are there any known effects of Лоразепам on blood pressure?

Official documentation notes that small decreases in blood pressure (hypotension) may occur as a possible side effect. These changes are generally considered temporary and not clinically significant.


Q: Can Лоразепам affect the results of lab tests?

The way the body processes the drug can potentially interfere with certain types of benzodiazepine urine screening tests. This interference may sometimes lead to an inaccurate (false-negative) result.

How should Лоразепам be stored and disposed of?

Official Storage and Disposal Requirements

Storage conditions for Lorazepam are dependent on the pharmaceutical form to maintain stability.

Product Form Temperature Requirement Container Rule
Oral Tablets Controlled Room Temperature (20 C to 25 C) Keep in a tight container, tightly closed.
Oral Concentrate Refrigerated (2 C to 8 C) Use with the calibrated dropper provided.

The oral concentrate has a defined in-use stability and must be discarded 90 days after first opening, even if refrigerated. The medication must be secured and kept out of the sight and reach of children to prevent misuse.

As a controlled substance, unused or expired Lorazepam should be disposed of through a drug take-back program when available. If not, the product must be mixed with an unappealing substance, placed in a sealed bag, and disposed of in household trash; it is not recommended for flushing.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

Available in countries:

Equivalent of Лоразепам found in:

A-Z Index: