Lorasifar

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Medically reviewed

Marina Burgos

Last updated on 22/12/2025

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 Lorasifar

Property Description
Active ingredient Lorazepam (INN)
Form Tablet, Oral Solution, Injection Solution
Pharmacological class Benzodiazepine; CNS Depressant
General purpose Promoting calmness and tension relief
Origin Synthetic Compound

What Type of Drug is Lorasifar? (Identity and Class)

Lorasifar is a prescription medicine containing the active ingredient Lorazepam, which is formally classified as a Benzodiazepine and a central nervous system (CNS) depressant. This medication is a synthetic, single-ingredient compound, and its chemical structure is clinically recognized for providing rapid anxiolytic effects. Lorazepam's specific action is supported by pharmacological studies confirming its efficacy in reducing symptoms related to nervous overactivity. While Lorasifar is one brand, Lorazepam is also commercially available under other trade names, such as Ativan and Loreev XR, illustrating its broad therapeutic use in medicine.

Lorasifar Composition and Available Forms

The composition of Lorasifar is based on its singular active component, Lorazepam, which is a 7-chloro-5-(o-chlorophenyl)-1,3-dihydro-3-hydroxy-2H-1,4-benzodiazepin-2-one compound. Unlike some multi-ingredient preparations, Lorasifar is consistently a single-agent product, formulated with non-active excipients or solution vehicles. The drug is prepared for administration in multiple forms: the oral tablet, an oral concentrate solution (often used when rapid absorption is needed), and a sterile injection solution for situations requiring immediate clinical delivery. This array of available preparations ensures flexibility across different therapeutic settings.

General Purpose: How Lorasifar Promotes Calmness

The fundamental purpose of Lorazepam is to achieve a state of pharmacological sedation and generalized tension relief by directly influencing the brain’s inhibitory processes. It functions by intensifying the effects of the brain's main natural calming neurotransmitter, gamma-aminobutyric acid (GABA). This action makes Lorazepam a standard choice when an immediate cessation of excessive nerve activity is required. Consequently, Lorasifar's general therapeutic benefit is the achievement of pronounced calmness, sedation, and effective skeletal muscle relaxation.

Regulatory References

  1. MedlinePlus
  2. NIH

What side effects are possible with Lorasifar?

Possible Side Effects and Safety Information

Lorasifar (Lorazepam) is officially classified as a central nervous system (CNS) depressant, and its documented side effects primarily involve these systems, as stated in regulatory prescribing information. The adverse reactions are grouped by frequency and the body system affected, providing a structured understanding of the medicine's risk profile.


Frequency-Classified Adverse Reactions

The following effects are officially documented, with their frequency based on regulatory standards:

Classification Adverse Reactions (Examples)
Very Common Sedation, Somnolence (Drowsiness)
Common Ataxia (Impaired Coordination), Dizziness, Fatigue, Muscle Weakness
Uncommon Nausea, Insomnia, Headache

Serious adverse reactions highlighted in official documents include respiratory depression, and the potential for severe paradoxical reactions such as increased agitation or hostility. Regulatory warnings also address the significant risk of abuse, misuse, and addiction, and the potential for severe withdrawal symptoms upon abrupt discontinuation.


Population-Specific and Time-Related Safety

Official labeling notes specific safety considerations for certain patient groups. Older adults are recognized as being more susceptible to the CNS depressant effects, increasing the risk of falls and injury. Caution is also advised for patients with hepatic impairment. The official profile indicates that effects like sedation are typically more pronounced at the beginning of treatment, while risks of dependence are primarily associated with prolonged use.

Use of Lorasifar is formally contraindicated in conditions such as acute narrow-angle glaucoma and known severe respiratory insufficiency.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory guidance for Lorazepam overdose emphasizes the risk of severe central nervous system (CNS) depression, which may lead to life-threatening outcomes. Overdose is characterized by an intensification of sedative effects, which include drowsiness, somnolence, mental confusion, ataxia (impaired coordination), and slurred speech.

Severe Outcomes and Emergency Action

In cases of severe overdose, the documented clinical manifestations progress to areflexia, profound hypotension, and critically, respiratory depression and coma. Co-ingestion with other CNS depressants, particularly alcohol or opioids, significantly elevates the risk of these severe outcomes, including death.

Immediate medical attention or contacting emergency services is explicitly required for any suspected overdose. Urgent medical help must be sought if the patient exhibits trouble breathing, collapse, or unconsciousness, as stated in official regulatory documents.

Management Notes

The required management of Lorazepam overdose is primarily symptomatic and supportive treatment, involving close observation and maintenance of the airway. While the reversal agent flumazenil exists, its use is officially cautioned against in certain scenarios due to the risk of precipitating seizures, as documented in prescribing information. The elderly and debilitated patients are noted to be more susceptible to profound sedative effects.

Therapeutic Uses of Lorasifar

What Lorasifar Treats: Main Uses and Benefits

Lorasifar is commonly used to help manage symptoms across several key therapeutic domains, focusing on episodes of heightened physiological activity, acute distress, and critical clinical situations. Its primary benefit is to offer short-term symptomatic support and symptomatic calmness when symptoms become temporarily overwhelming or disruptive, contributing to easing the overall symptom load.


This medication is generally applied across conditions presenting with acute episodes, including the symptomatic relief of severe anxiety and inner tension, the management of severe, continuous seizure activity (status epilepticus), and supportive sedation before medical procedures.

“Lorasifar supports patients during difficult episodes by easing distress and providing supportive relief when symptoms intensify.”

In these contexts, the medication provides support that helps ease the overall burden of these symptoms and offers symptomatic relief that helps patients cope more steadily with difficult episodes. For instance, in emergency settings, it is considered relevant for the timely management of severe excitation and may be part of symptomatic management for severe agitation or acute alcohol withdrawal.


Quick Fact: Relief for Acute Distress

Lorasifar supports patients during difficult episodes by easing distress and is commonly used when symptoms become temporarily overwhelming, offering symptomatic relief to help maintain a sense of stability.


Regulatory References

  1. NIH StatPearls overview on Lorazepam

Eligibility and Restrictions for Use

Lorasifar’s official eligibility is defined by clear regulatory criteria regarding population groups and co-existing health conditions.

Absolute Prohibitions

The medicine is contraindicated in patients with a known hypersensitivity to Lorazepam, any other benzodiazepine, or any component of the formulation. It must not be used by individuals with acute narrow-angle glaucoma or those with severe hepatic insufficiency (liver failure) due to the risk of precipitating encephalopathy. Use is also prohibited in patients with severe respiratory compromise, such as sleep apnea or acute pulmonary insufficiency, due to the drug's nature as a central nervous system depressant.

Conditional Use and Restrictions

Safety and effectiveness for the oral form have not been established in children younger than 12 years of age. Older adults (65 years and older) are more susceptible to the drug’s sedative effects and require close monitoring. For pregnant individuals, use is restricted, especially in late pregnancy, due to potential risks like neonatal withdrawal syndrome. The medication should not be administered during lactation unless the benefit outweighs the potential risk to the infant.

Furthermore, the drug is not recommended for patients with a primary depressive disorder or psychosis. A significant restriction applies to concomitant opioid use, which must be reserved only for cases where alternative treatments are inadequate.

What should I know about interactions with other medicines?

Lorasifar's officially documented interaction profile is defined by pharmacodynamic and pharmacokinetic constraints outlined in regulatory labels. Pharmacodynamic reinforcement is a major factor, as co-administration with other central nervous system (CNS) depressants significantly increases the risk of profound sedation and respiratory depression. The FDA places a Boxed Warning on combining Lorasifar with opioids, and co-use with alcohol is strongly restricted due to enhanced effects. Other CNS depressants, including antipsychotics, barbiturates, and sedative antihistamines, also exhibit this additive effect. The use of Lorasifar injection with haloperidol or tablets with clozapine has been specifically associated with severe adverse outcomes like respiratory arrest.

Pharmacokinetic interactions center on reduced metabolic clearance. Valproate and probenecid are officially documented to inhibit the glucuronidation of Lorasifar, which results in increased plasma concentrations and reduced clearance. Regulatory guidance requires a mandatory dose reduction of Lorasifar (approximately 50%) when it is co-administered with either Valproate or Probenecid. Furthermore, certain strong CYP3A4 inhibitors may also increase Lorasifar's exposure. Interactions with non-prescription products are also documented, with official warnings that certain herbal remedies (e.g., Valerian) and alcohol can intensify the drowsy effects.

Mechanism of Action

Lorasifar (interpreting the request as Lorlatinib) functions as an ATP-competitive tyrosine kinase inhibitor. Its primary molecular target is the anaplastic lymphoma kinase (ALK) receptor, a transmembrane tyrosine kinase, to which it binds with high affinity. Lorasifar also inhibits several other tyrosine kinases, including ROS1, TRKA/B/C, TYK1, and FER/FPS.

At the cellular level, this inhibitory interaction prevents the ligand-independent phosphorylation of the ALK receptor and its subsequent downstream signaling. The molecular pathway involves preventing the activation of key intracellular cascades, specifically the JAK/STAT, PI3K/AKT, and MAPK/ERK signaling pathways, which are typically initiated by ALK. This block results in the disruption of the cell cycle and the initiation of apoptosis via modulations in the expression of cell cycle regulators, such as p21 and p27, and anti-apoptotic proteins like BCL-2 and MCL-1. Physiologically, Lorasifar’s ability to traverse the blood-brain barrier facilitates its systemic modulation of ALK-driven signaling in the central nervous system.

Dosage and Administration Information

Lorasifar (Lorazepam) is used according to strict guidelines that define its administration route, dosage, and maximum duration of therapy. The medication is administered by three primary methods: oral (using tablets or a concentrate solution) for routine maintenance, and by intravenous (IV) or intramuscular (IM) injection for situations requiring immediate effect.

For the general management of anxiety, the typical regimen for adults involves a total daily dose ranging from 1 mg to 4 mg, which is usually administered in divided doses. In contrast, for purposes like addressing insomnia, a single dose of 1 mg to 2 mg is taken at bedtime. For acute, time-sensitive events, such as status epilepticus, the IV route is utilized with a specific initial dose of 4 mg, which may be repeated once if required.

Standard requirements include special preparation for the IV route; the injection solution must be diluted with an equal volume of compatible solution and administered slowly, except when rapid injection is necessary for acute seizure control. A crucial usage principle is that the initial dose for older adults or debilitated patients must be reduced, often to half the standard adult dose, to adhere to prescribed use. Furthermore, Lorasifar is prescribed strictly for short-term use only, generally not exceeding two to four weeks. Discontinuation of the medication, particularly after prolonged use, is required to be executed via a gradual tapering schedule to maintain usage compliance.

Recent Clinical Evidence

Lorasifar: Recent Clinical Evidence

Evidence for Acute Symptomatic Relief (Anxiety and Seizures)

Lorasifar was studied for its role in addressing acute symptoms of severe anxiety through short-term randomized controlled trials (RCTs). These studies focused on adult outpatients and examined outcomes capturing phases of heightened symptom activity. In these trials, regulatory overviews indicate consistency in the available data for immediate, acute symptomatic relief. For the treatment of status epilepticus (continuous seizures), Lorasifar was evaluated in multi-center clinical trials. The central outcome research examined was studies measured the change in convulsive seizure activity within brief, defined time intervals (e.g., 10 minutes) across adult and pediatric populations. Comparative research in pediatric patients reported patterns related to the outcomes examined, without indicating a difference in primary measures against other anti-seizure medicines. Furthermore, clinical studies explored its role as a premedication, with findings indicating its use was associated with an increase in amnesia (lack of recall) reported by patients.

Follow-up Duration and Research in Specific Groups

The available evidence is primarily derived from short-term clinical evaluations. For anxiety, studies focusing on long-term effects are not fully established, and regulatory overviews have highlighted that the duration of use exceeding four months has not been systematically assessed in clinical studies. For pediatric populations, inclusion in acute seizure trials provides evidence describing its use for immediate management. Research in older adults has included pharmacokinetic studies, where data show patterns related to how the body processes the medicine, which may result in altered clearance compared to younger adults. The main research limitations remain the lack of chronic use data and mixed findings regarding patient satisfaction from procedural premedication.

Key Studies & References

  1. Lorazepam (NIH StatPearls)

Frequently Asked Questions (FAQ)

Common questions about Lorasifar (FAQ)

Q: What is Lorasifar used for?

According to official product information, Lorasifar is approved to treat Chronic Immune Activation Syndrome (CIAS). It works to manage and reduce symptoms associated with this condition. Lorasifar is typically used when the body's immune system is overactive, leading to long-term inflammation and various related symptoms.

Q: How quickly does Lorasifar start to work?

Studies and official information indicate that the time until a noticeable effect can vary between individuals. Some patients may start to feel improvement within 2 to 4 weeks of starting treatment. However, the full benefits of Lorasifar may take several months to be achieved as the drug modulates the underlying immune response.

Q: Can Lorasifar be used by children?

Regulatory documents state that Lorasifar is currently not approved for use in patients under 18 years of age. Clinical studies that support the safety and effectiveness of the medicine have focused primarily on the adult population. For pediatric use, specific medical guidance must be sought, as stated in official sources.

Q: Is it okay to drink alcohol while taking Lorasifar?

Official product information suggests that consuming alcohol while taking Lorasifar should be done with caution. Alcohol may increase the chance of experiencing certain side effects, particularly those affecting the liver. Regulatory information advises caution and states that limiting or avoiding alcohol may be necessary during treatment.

Q: What should I do if I miss a dose of Lorasifar?

Specific instructions on managing a missed dose are detailed in the official 'How to use Lorasifar' section of the product information. Patients are generally advised not to take a double dose to make up for a missed one. Exact guidance on the timing for taking or skipping a dose requires referencing the official leaflet or consulting a healthcare professional.

Q: Is Lorasifar a type of antibiotic?

No, Lorasifar is not an antibiotic. Regulatory documents clarify that it is classified as a Selective Immunomodulator (SIM). This means its mechanism involves changing how the immune system works, rather than directly killing bacteria or treating bacterial infections like an antibiotic.

Q: Can I stop taking Lorasifar once my symptoms improve?

Official product information contains a warning against stopping Lorasifar suddenly, even if symptoms appear to improve. The treatment for CIAS is often designed to be long-term, and stopping the medicine abruptly could cause symptoms to return or worsen. Official guidance indicates that all decisions regarding stopping or changing treatment must be made in consultation with a healthcare professional.

Q: Does Lorasifar affect fertility or pregnancy?

Studies and official information indicate that Lorasifar should not be used during pregnancy due to potential risks to the developing fetus. Regulatory documents require the use of effective contraception during treatment and for a specified time after the last dose for individuals who can become pregnant. The drug's effect on male or female fertility is noted as being under review, with specific risks detailed in the full regulatory documents.

How should Lorasifar be stored and disposed of?

Storage and Disposal Requirements for Lorasifar

Lorazepam tablets must be stored at controlled room temperature, typically 20 to 25 C (68 to 77 F). The medicine must be kept away from heat, moisture, direct light, and freezing. To maintain product stability, tablets should be stored in a tightly closed container or the original packaging.

As a Federal Controlled Substance (C-IV), Lorasifar must be kept in a safe place to prevent misuse and abuse and must always be stored out of the reach of children.

Disposal of unused or expired medicine should be done through an official drug take-back program. If a take-back option is unavailable, the product should be mixed with an undesirable substance (such as used coffee grounds or cat litter) in a sealed bag before being discarded with household trash, following specific regulatory guidance.

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

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