Lobazam

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Lobazam

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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 Lobazam

Property Description
Active ingredient Clobazam
Form Oral Tablet, Oral Suspension, Oral Film
Pharmacological class Benzodiazepine, Central Nervous System (CNS) Depressant
Common use Anticonvulsant (for seizures), Anxiolytic
Origin Synthetic compound

What is Lobazam: Identity and Pharmacological Classification?

Lobazam is a prescription-only medication defined by its active ingredient, Clobazam, a synthetic compound within the pharmacological class of benzodiazepines. It is broadly categorized as a Central Nervous System (CNS) Depressant, meaning its core function is to modulate and slow down overactivity in the nervous system. Clobazam holds a distinct position as a 1,5-benzodiazepine derivative, a structural distinction that is clinically recognized for conferring a unique efficacy and tolerability profile compared to traditional 1,4-benzodiazepines. This unique molecular geometry underlies its specific pharmacological attributes.

Lobazam's Composition and Available Forms

Clobazam is provided as a single-ingredient product, intended for oral administration and manufactured in several high-level dosage forms. While commonly supplied as an Oral Tablet, the active substance is also formulated into an Oral Suspension and an Oral Film. This diversity in dosage forms is specifically designed to accommodate diverse patient groups, including both adults and certain pediatric populations, by offering flexibility in delivery. The medicine's composition is strictly limited to the active substance plus necessary pharmaceutical excipients to ensure stability and proper absorption.

What is the General Therapeutic Purpose of Clobazam?

The general purpose of Lobazam is to stabilize and quiet excessive electrical signaling in the brain, leveraging its core action as a CNS Depressant. This activity is the source of its two primary functional benefits: acting as an anticonvulsant and functioning as an anxiolytic. The drug's anticonvulsant role is utilized to help control the abnormal neurological discharges associated with seizures. Similarly, its anxiolytic property makes it useful for managing states of intense or severe anxiety by providing generalized neural stabilization.

What side effects are possible with Lobazam?

Official Safety Profile of Lobazam (Clobazam)

Clobazam's safety profile is documented based on classifications from government regulatory agencies, detailing adverse reactions by frequency and physiological system. This information is critical for understanding the drug's safety characteristics but does not constitute clinical advice or instruction.


Adverse Reactions and Frequency Classification

The most frequently reported adverse events are often linked to the drug's Central Nervous System (CNS) depressant properties:

  • Common Reactions (occurring in ge 1/100 to <1/10 of patients, as per regulatory documentation): Somnolence (drowsiness), sedation, lethargy, fatigue, constipation, pyrexia (fever), and irritability.
  • Uncommon Reactions (occurring in ge 1/1000 to <1/100): Anxiety, delusion, and amnesia (memory impairment).

Reactions classified as Frequency Not Known (incidence cannot be estimated from available data) include severe dermatological events, dependence, and psychotic disorders.


Serious Adverse Reactions and Safety Constraints

Official labeling documents risks for several serious adverse reactions. These include Serious Dermatological Reactions such as Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN), and Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS). As an antiepileptic drug, Clobazam is also associated with a documented risk of suicidal behavior and ideation.

Use of Clobazam is formally restricted in certain situations. The medicine carries a Boxed Warning regarding risks of abuse, misuse, addiction, and physical dependence. Co-administration with opioids or other CNS depressants significantly increases the documented risk of profound sedation, respiratory depression, and death.


Time-Related Patterns and Population Notes

The label specifies that somnolence and sedation are generally more pronounced at the initiation of treatment or following a dose increase. Dependence and tolerance are recognized risks of long-term exposure, which necessitates a gradual dosage reduction when the medicine is stopped to prevent acute withdrawal reactions. Special safety considerations are noted for older adults and patients with hepatic impairment, who may experience increased effects due to slower clearance of the medicine.

Overdose and Emergency Response

Overdose and when to seek help

Overdose with Clobazam (Lobazam) typically presents as a spectrum of Central Nervous System (CNS) depression. Documented manifestations include drowsiness, confusion, somnolence, slurred speech, ataxia (impaired coordination), and ultimately a change or loss of consciousness. The most severe outcomes are profound sedation and respiratory depression (shallow or slowed breathing), which can advance to coma and may lead to death.

This risk is significantly amplified by the co-ingestion of other CNS depressants, including alcohol or opioids, which is cited in official regulatory labeling as a major factor increasing the risk of fatal outcomes. Regulatory authorities require that individuals seek emergency medical care immediately upon the development of severe symptoms, such as unresponsiveness, extreme sleepiness, or any sign of respiratory compromise.

Management described in official prescribing information is primarily symptomatic and supportive treatment, focusing on securing a patent airway and monitoring hemodynamic status. The benzodiazepine antagonist Flumazenil may be considered; however, official labels caution against its use due to the risk of precipitating acute withdrawal reactions or seizures in physically dependent patients. Immediate medical assistance is also required for sudden, severe skin reactions, such as blistering or peeling.

Therapeutic Uses of Lobazam

Main Uses of Lobazam

Lobazam is a medication belonging to the benzodiazepine class, specifically the 1,5-benzodiazepine subclass. It is primarily used as an adjunctive therapy for the management of seizures associated with various forms of epilepsy. Unlike some other medications in this class, it is often selected for its specific pharmacological profile in treating difficult-to-manage seizure disorders.

Treatment of Epilepsy and Seizures

The primary clinical application of Lobazam is in the treatment of Lennox-Gastaut Syndrome (LGS), a severe form of childhood-onset epilepsy characterized by multiple seizure types. It is used alongside other anti-epileptic drugs to help improve seizure control. The medication is effective against several types of seizures, including:

  • Atonic seizures: Also known as drop attacks, where a sudden loss of muscle tone occurs.
  • Tonic seizures: Where the muscles suddenly become stiff or tense.
  • Myoclonic seizures: Brief, shock-like jerks of a muscle or a group of muscles.

Benefits in Symptom Management

Lobazam helps to stabilize electrical activity in the brain by enhancing the effect of gamma-aminobutyric acid (GABA), a neurotransmitter that inhibits excessive nerve cell activity. The potential benefits for patients include:

  • Reduction in Seizure Frequency: When added to an existing treatment regimen, it can help decrease the total number of daily or weekly seizure episodes.
  • Management of Treatment-Resistant Cases: It is often utilized when patients have not achieved adequate seizure control with first-line anti-epileptic medications.
  • Improvement in Daily Stability: By reducing the frequency of sudden drop attacks or tonic episodes, the medication aims to provide a more stable environment for the patient's daily activities.

Regulatory References

  1. NIH MedlinePlus Drug Information

Eligibility and Restrictions for Use

The eligibility for Clobazam (Lobazam) is strictly defined by regulatory agencies and is based on absolute exclusions or conditional use requirements. The medicine is officially indicated for adults and pediatric patients 2 years of age and older. Safety and effectiveness have not been established for children younger than two years.


Absolute Exclusions (Contraindications)

The medicine must not be used by individuals with a known hypersensitivity to Clobazam or any benzodiazepine. Regulatory documents also state absolute contraindications for patients with:

  • Myasthenia Gravis
  • Severe Respiratory Insufficiency
  • Severe Hepatic Insufficiency
  • Sleep Apnoea Syndrome

Use is also generally contraindicated in breast-feeding women in certain regions.


Conditional Use and Restrictions

Certain populations are eligible but require special caution and a reduced starting dose as mandated by official labeling. These include geriatric patients (65 years), individuals with mild to moderate hepatic impairment, and those identified as CYP2C19 Poor Metabolizers. Additionally, patients with a history of drug or alcohol dependence are subject to restrictions due to the risk of dependence.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Lobazam, whose active ingredient is Clobazam, has documented interaction patterns based on regulatory labeling that define specific constraints for co-administration.

Drug-Drug and Substance Restrictions A severe restriction exists regarding co-administration with opioids. This combination may result in profound sedation, respiratory depression, coma, and death due to an officially documented additive Central Nervous System (CNS) depressant effect. Other CNS Depressants, such as antipsychotics, sedative antihistines, and other anticonvulsants, also enhance the central depressive effect. Alcohol increases Clobazam’s exposure by approximately 50% and further potentiates CNS depression.

Metabolic Interaction Patterns Clobazam is officially documented as a weak inhibitor of CYP2D6, which may require monitoring for drugs that are sensitive substrates of this enzyme. The drug also acts as a weak inducer of CYP3A4. Due to this induction, the effectiveness of hormonal contraceptives may be diminished, and official labeling recommends using an additional non-hormonal form of contraception during treatment and for 28 days after the final dose.

Metabolite Exposure Alteration Co-administration with strong or moderate CYP2C19 inhibitors (such as fluconazole or omeprazole) significantly increases the systemic plasma exposure of the active metabolite, N-desmethylclobazam. This effect is also seen with Cannabidiol (CBD), which causes a bi-directional pharmacokinetic interaction resulting in three- to four-fold elevated levels of the active metabolite and increased somnolence. These documented interactions define the need for specific consideration of potential concentration changes in the active metabolite.

Mechanism of Action

The core mechanism of Lobazam is defined by its action as a Positive Allosteric Modulator (PAM) of the GABA-A receptor, the central nervous system's primary inhibitory target . By interacting with a specific allosteric site, the drug enhances the effect of the neurotransmitter GABA, causing the receptor's intrinsic chloride ion channel to open more frequently. This molecular change drives a greater influx of negative chloride ions ( Cl^-) into the neuron, resulting in a hyperpolarized state that significantly increases the electrical threshold required for neuronal firing. This overall physiological consequence is the dampening of general neuronal excitability.

The full physiological effect is sustained through the concerted action of the parent drug, Clobazam, and its long-acting active metabolite, N-desmethylclobazam. Both components modulate the GABA-A receptor, contributing to the prolonged inhibition maintained across central neural pathways. However, this mechanism is subject to the biological constraint of mechanism tolerance. Prolonged continuous amplification can lead to adaptive changes in receptor sensitivity, reducing the drug's capacity to maintain hyperpolarization and thereby limiting the sustained action of the mechanism.

Dosage and Administration Information

How to Use Lobazam: Administration Guidelines

Lobazam is for oral administration only and is available as a tablet, oral suspension, and oral film. The instructions for use are defined by weight and clinical status, requiring a gradual approach to both initiation and discontinuation.


Dosing and Schedule Principles

Guideline Specification
Starting Dose Typically 5 mg or 10 mg daily, depending on body weight (or other criteria for specific populations like older adults).
Dosing Frequency A daily dose greater than 5 mg should be administered in two divided doses (twice daily). A 5 mg dose may be taken once daily.
Titration Dose escalation must proceed gradually, no more rapidly than weekly, to allow serum concentrations to reach a steady-state.
Maximum Dose The maximum recommended daily dose for patients weighing over 30 kg is 40 mg; for patients 30 kg or less, the maximum is typically 20 mg.

Administration and Population-Specific Rules

Lobazam can be taken with or without food. Administration differs based on the formulation:

  • Tablets: Can be swallowed whole, broken along the score, or crushed and mixed in applesauce.
  • Oral Suspension: Must be shaken well before each use and measured only with the provided oral dosing syringe.
  • Oral Film: Placed on the tongue to dissolve; do not chew, spit, or take with liquids.

Population Adjustments: Older adults, patients with mild to moderate hepatic impairment, and individuals identified as CYP2C19 poor metabolizers must begin with a lower starting dose (e.g., 5 mg daily) and titrate at a slower rate than the standard schedule.

Discontinuation: The medication must be withdrawn gradually by tapering the total daily dose by 5 to 10 mg/day weekly to avoid potential abrupt withdrawal effects.

Recent Clinical Evidence

Research evidence / Overview of studies for Lobazam (Clobazam)


Evidence for use in Lennox-Gastaut Syndrome (LGS)

Research exploring Clobazam's role in Lennox-Gastaut Syndrome (LGS), a severe form of epilepsy, has primarily relied on randomized, controlled trials (RCTs), a key design for evaluating clinical change. These studies were conducted to explore how symptoms change over time for patients who were randomized to receive Clobazam or placebo, both added to their existing treatment. The outcomes monitored in these trials were primarily outcomes describing episodic or acute changes, focusing on specific seizure types characteristic of LGS. Specifically, studies monitored the average weekly rate of drop seizures (such as atonic or tonic seizures) over defined time intervals to compare outcomes between the groups. These studies included populations characterized by conditions associated with acute or disruptive episodes, encompassing both children and adults who had not achieved sufficient seizure control with other medications.

Findings described the difference in seizure frequency patterns observed between the group randomized to Clobazam and the group randomized to placebo. Research highlights differences measured during the study period, detailing the observed patterns in drop seizure frequency. The data describe seizure frequency patterns observed during the short-term trial period, which provided the core evidence used by regulatory bodies for their evaluations.


The Research Landscape for Anxiety and Tension

Clobazam was studied for its role as an anxiolytic, or a treatment for symptoms of severe anxiety and pronounced psychological tension. The evidence for this use is based on both historical controlled trials and subsequent observational settings that monitor daily functioning patterns. This evidence contributes to the overall understanding of symptom patterns in conditions involving periods of heightened symptoms. The studies explored outcomes related to physical discomfort and outcomes monitoring physiological strain or stress, often measured using standardized anxiety scales or clinician assessments.

Research describes the changes measured during the study period, with findings detailing observed symptomatic patterns when Clobazam was used in patients with anxiety-related conditions. However, compared to the evidence for LGS, evidence quality varies across studies, and data are still emerging from more recent research contexts involving fluctuating or unstable symptoms.


Current Research Gaps and Areas of Uncertainty

The research provides context but not individual predictions. Evidence highlights what is known, and what is still uncertain, helping to contextualize how patients reported their experience in the studies. The major limitations are primarily structural:

  • Limited Long-Term Data: There is limited information for long-term outcomes, as the highest-quality, controlled research typically had follow-up durations that were limited to a few months.
  • Tolerance and Sustained Response: Research exploring short-term symptom changes provides limited insight into tolerance over time, where the effect may diminish for some individuals.

Frequently Asked Questions (FAQ)

Common questions about Lobazam (FAQ)

Q: What is the main difference between Lobazam and other similar medicines?

A: Lobazam is chemically classified as a 1,5-benzodiazepine, which is structurally distinct from the more common 1,4-benzodiazepines. Official information suggests this difference contributes to a unique profile focused on anxiolytic (anti-anxiety) and anticonvulsant (anti-seizure) properties. Studies have observed a potential for fewer sedative side effects compared to some other medicines in this class, though sedation is still commonly reported.

Q: Does Lobazam cause long-term side effects?

A: Long-term use of this class of medication is associated with risks of tolerance, which means the drug’s effectiveness may diminish over time, and physical dependence. Official documents indicate other potential risks of long-term exposure can include subtle changes in mood, such as depression or irritability, and impaired memory.

Q: How quickly does Lobazam start working after taking it?

A: According to pharmacokinetic studies, the drug concentration in the bloodstream reaches its peak level within approximately 30 minutes to 4 hours after a dose is taken. This time frame generally corresponds to when the medication begins to exert its primary effects in the central nervous system.

Q: Does taking Lobazam make it unsafe to drive?

A: Official product information states that clobazam can have a major influence on a person's ability to drive or operate heavy machinery. Adverse effects like sedation, amnesia (memory loss), impaired concentration, and impaired muscular function are documented risks, all of which have the potential to affect alertness and coordination.

Q: Are there any major food or drink restrictions while on Lobazam?

A: The medication can be taken with or without food. However, alcohol poses a significant restriction; official warnings state that consuming alcohol potentiates side effects like dizziness and drowsiness, and co-administration is a documented constraint. Other major food or drink restrictions are not specified in the regulatory labeling.

Q: How long does the effect of one dose of Lobazam typically last?

A: Lobazam has a long-acting profile. The mean half-life (the time it takes for half of the drug to be eliminated from the body) for the active substance is approximately 36 to 42 hours. Furthermore, its main active component, a metabolite, has an even longer half-life, which may last up to 82 hours, contributing to the medication’s sustained effect.

Q: Do I need to take Lobazam at the same exact time every day?

A: Official guidelines emphasize consistency and state that daily doses greater than 5 mg should be administered in divided doses 2 times a day. Its long half-life means it takes a long time to build up consistent levels in the body, which helps to maintain the medication’s effect. Consistency in daily timing is generally used to support this.

Q: Can Lobazam be taken if I have kidney problems?

A: Official dosage guides indicate that for people with mild to moderate kidney problems (renal dysfunction), a dose adjustment is typically not recommended. However, data is limited regarding use in individuals with severe kidney problems, and this usage requires specialized assessment and discussion with a healthcare provider.

Q: Does Lobazam interact with herbal supplements like St. John's Wort?

A: Official drug interaction information indicates that concurrent use of clobazam with St. John's Wort may increase the risk of certain side effects. This potential interaction is a documented consideration that may influence clinical management.

Q: What does 'potential for dependence' mean regarding Lobazam?

A: The official Boxed Warning highlights the risk of physical dependence. This means that after a period of regular use, the body becomes physically accustomed to the drug's presence. If the medication is abruptly stopped or the dose is suddenly reduced, the body may react with unpleasant physical withdrawal symptoms.

Q: Are there any specific safety warnings for taking Lobazam during pregnancy?

A: Regulatory warnings describe a potential association with fetal malformations or withdrawal symptoms in the newborn. Additionally, newborns exposed to the drug late in pregnancy may be at risk for a syndrome characterized by hypotonia (low muscle tone), reduced respiratory function, and feeding difficulties (sometimes called floppy infant syndrome).

Q: Is there research looking at new uses for Lobazam?

A: While officially indicated for Lennox-Gastaut Syndrome (LGS) and anxiety, authoritative sources note that it is sometimes utilized for other severe and rare forms of epilepsy, such as Dravet syndrome. This use is not within the drug's primary regulatory indications but is mentioned in medical literature.

Q: Is feeling dizzy a normal reaction to starting Lobazam?

A: Dizziness is a known central nervous system (CNS) side effect associated with benzodiazepines. Although dizziness is often specifically cited as a symptom of withdrawal syndrome when the drug is being reduced, it is a possible CNS-related effect that may occur during the treatment initiation phase.

Q: What are the signs of an allergic reaction to Lobazam?

A: Severe skin and allergic reactions are documented risks. Signs of these serious reactions may include a combination of fever, sore throat, fatigue, rash, hives, painful blisters, skin peeling, swollen lymph nodes, or red, irritated eyes.

Q: Does Lobazam have an impact on mood or cause depression?

A: Official safety documents list possible mood changes that include irritability, aggression, and anxiety. Additionally, depression is noted as a possible side effect. The medication also carries a serious warning regarding the risk of suicidal behavior and ideation.

Q: What is the maximum duration Lobazam can typically be used?

A: The maximum duration of use depends on the condition being treated. For symptoms of anxiety, regulatory bodies suggest that treatment should typically not exceed 4 weeks. For epilepsy, it is indicated as an add-on therapy that is sometimes continued for an extended duration based on clinical need.

Q: What is the difference between the brand name and generic version of Lobazam?

A: Both the brand name and generic versions of the medication contain the exact same active ingredient (clobazam). However, the non-active ingredients (like binders or coatings) may differ. Regulatory standards require generics to demonstrate bioequivalence, meaning they must be absorbed and distributed in the body in the same way as the brand-name product.

Q: Is Lobazam typically covered by insurance?

A: Coverage for the active ingredient, clobazam, is commonly available through prescription benefit programs, such as Medicare Part D. However, the specifics of co-pays, deductibles, and the extent of coverage can vary significantly depending on the individual insurance plan.

Q: Do studies show Lobazam is effective for rare forms of seizures?

A: Official documentation indicates the drug is approved for the treatment of seizures associated with Lennox-Gastaut Syndrome (LGS). However, it has been studied and sometimes utilized in managing other rare seizure disorders, such as Dravet syndrome.

Q: Why is regular monitoring important when taking Lobazam?

A: Regular monitoring is essential to help detect and manage risks associated with long-term treatment. This includes watching for severe safety concerns like serious skin reactions (SJS/TEN/DRESS) and changes in mental health, such as the emergence of suicidal thoughts. It also helps manage the risks of dependence and tolerance over time.

Q: What type of doctor usually prescribes Lobazam?

A: Lobazam is typically prescribed by specialists focused on neurological conditions. Authoritative medical literature indicates the medication is commonly managed by neurologists, particularly those specializing in the treatment of epilepsy and other seizure disorders.

Q: Can I donate blood while taking Lobazam?

A: In general, individuals taking anti-epileptic medications are often considered eligible to donate blood if they have been seizure-free for a defined time period as determined by the donation center’s guidelines. Eligibility rules are set by the local blood donation center and should be verified.

Q: Why is Lobazam sometimes used as an add-on treatment?

A: The drug is formally indicated by regulatory bodies for the adjunctive treatment (or add-on treatment) of seizures associated with Lennox-Gastaut Syndrome (LGS). This means it is designed to be used in combination with a patient’s existing anticonvulsant medications to help achieve better seizure control.

Q: Does Lobazam affect my sleep patterns?

A: As a central nervous system (CNS) depressant, the medication can cause side effects like sedation and drowsiness. Official labeling also notes that caution is necessary for patients with existing breathing issues during sleep, such as sleep apnoea, due to potential respiratory risk. If insufficient sleep duration occurs, impaired alertness may be increased.

Q: How is the effect of Lobazam explained in simple terms?

A: Lobazam works by enhancing the natural braking system in the brain. It is thought to work by enhancing the effects of chemical messengers called GABA, which serve to slow down brain signals. This dampens the overall electrical excitability of nerve cells, helping to prevent the rapid, uncontrolled firing that causes seizures.

Q: Does Lobazam interact with cold and flu medicines?

A: Yes, this medication can interact with some cold and flu treatments. Official warnings state that extreme caution is needed when combining clobazam with products that contain opioid ingredients (like some cough medicines) or other ingredients that cause CNS depression (such as certain antihistamines), as this significantly increases the risk of profound sedation and respiratory distress.

How should Lobazam be stored and disposed of?

Lobazam (clobazam) must be stored at controlled room temperature, typically 20 C to 25 C (68 F to 77 F), in a closed container. It is mandatory to keep the medicine from freezing and protect it from heat, moisture, and direct light. Due to its classification as a controlled substance (Schedule IV), it must be stored securely and out of the sight and reach of children to prevent misuse.

Official Stability and Disposal

Scope Item Official Regulatory Statement
Stability after opening: Oral Suspension: Discard any unused liquid 90 days after the bottle is first opened.
Disposal instructions: Dispose of unused product in accordance with local requirements; do not keep outdated medicine.

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

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