Distraneurine

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Distraneurine

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 Distraneurine

Quick Facts

Property Description
Active ingredient Clomethiazole (Clomethiazole hydrochloride)
Forms Capsules, Oral liquid, Intravenous solution
Pharmacological class Sedative-Hypnotic, Anxiolytic
Common use Acute agitation, Severe restlessness, Short-term insomnia
Origin Synthetic small molecule drug

What is Distraneurine and Its Chemical Classification?

Distraneurine is a trade name for the synthetic, prescription-only medication whose active ingredient is clomethiazole. The substance is categorized under the Anatomical Therapeutic Chemical (ATC) system under N05CM, defining it as an other hypnotic and sedative. This classification places it within the group of central nervous system (CNS) depressants. Heminevrin is another prominent brand name containing the same formulation. Clomethiazole is a non-benzodiazepine product, setting it apart from similar drug classes, though its effects are comparable to those of benzodiazepines.

Clomethiazole’s General Purpose and Mode of Action

The primary general purpose of Clomethiazole is to relieve acute states of severe symptoms, such as agitation, restlessness, and profound, short-term insomnia. It acts as a gamma-aminobutyric acid (GABAA)-mimetic drug, which means it boosts the effect of the brain’s natural calming messenger, GABA, to stabilize neuronal activity. This capability is clinically recognized for rapidly reducing both mental and physical over-activity, a crucial requirement in managing acute clinical scenarios.

Available Preparations and Drug Forms

Clomethiazole is available in multiple dosage forms, notably soft gelatin capsules, an oral liquid, and a specialized intravenous solution. The availability of both oral and intravenous preparations allows medical professionals to select the appropriate route of administration based on the urgency of the patient's condition. The IV form is typically reserved for highly acute, destabilizing states where an immediate and powerful sedative effect is necessary.

What side effects are possible with Distraneurine?

Possible Side Effects and Safety Information

The safety profile of clomethiazole (Distraneurine) is officially categorized by regulatory agencies based on the frequency and system-organ class (SOC) of the reported adverse reactions.

Officially Classified Adverse Reactions

Adverse reactions listed in official documents are classified by their likely frequency:

Frequency Example Adverse Reaction Domains
Common Nasal congestion, Conjunctival irritation, Excessive sedation, Headache.
Rare Anaphylactic reactions, Bullous skin eruptions, Paradoxical excitement, Confusion.

Common effects such as nasal congestion and irritation are documented as being most likely with the initial dose, with the severity generally decreasing with subsequent administration. Other effects, which are grouped under their physiological system, include reversible increases in transaminases or bilirubin (hepatobiliary disorders) and increased nasopharyngeal/bronchial secretions (respiratory disorders).

Duration and Serious Safety Patterns

The official label documents that physical dependence and tolerance may occur following the prolonged administration of high doses. Abrupt cessation after long-term exposure can lead to severe withdrawal reactions, which include convulsions and organic psychosis.

A significant safety note involves serious interactions: fatal cardiorespiratory collapse has been explicitly reported when clomethiazole was used alongside other centrally acting depressant drugs, including alcohol and benzodiazepines. Furthermore, the drug should be used with great caution or avoided in patients with conditions causing hypoxia (e.g., respiratory insufficiency), as the sedative effect can mask an acute confusional state.

Population-Specific Cautions

Specific cautions are defined for certain patient groups. Older adults may have an increased potential for excessive sedation and uncommon hangover effects. Great caution is advised for those with gross liver damage, as the sedative effects may mask the onset of liver coma, and caution is also observed for patients with chronic renal disease.

Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory information describes Distraneurine (Clomethiazole) overdosage as a severe clinical event centered on profound Central Nervous System (CNS) and cardiorespiratory depression. Urgent medical attention is required for any suspected overdose.

Documented Overdose Manifestations

The main clinical signs listed in regulatory documents include coma, respiratory depression, severe hypotension, and hypothermia. These manifestations require immediate intervention.

Life-Threatening Risks and Contextual Factors

The official labeling documents the potential for fatal cardiorespiratory collapse, particularly when clomethiazole is co-ingested with alcohol or other CNS depressant drugs. The effects may also be exacerbated in patients with evidence of alcoholic liver disease.

Emergency Management

There is no specific antidote known to clomethiazole. Consequently, regulatory guidance specifies that treatment must proceed on a strictly symptomatic basis, applying principles similar to those used for managing barbiturate overdosage. Procedures such as charcoal column haemoperfusion are noted as being ineffective. The presence of life-threatening signs mandates immediate contact with emergency medical services for supportive care and hospital monitoring.

Therapeutic Uses of Distraneurine

What Distraneurine treats: Main Uses and Benefits

Distraneurine is generally used in specific, acute clinical contexts where short-term, supportive symptom management is appropriate. The medication is commonly applied across conditions presenting with acute episodes that may benefit from temporary stabilization.

The primary therapeutic applications generally involve the management of acute alcohol withdrawal syndrome (AWS), the symptomatic support for marked agitation and severe restlessness, and the short-term relief for profound insomnia. The overall benefit may contribute to supporting the patient during difficult episodes by easing distress and may assist with maintaining a sense of stability when symptoms are more noticeable.

“It is commonly used when symptoms intensify and supportive relief is needed, particularly in situations involving heightened systemic burden.”


Quick Fact: Relief for Severe Symptoms

Domain Key Symptom Addressed Patient Benefit
Withdrawal Pronounced tremor, anxiety May assist with maintaining functional stability
Agitation Intense physical restlessness Helps ease the overall symptom burden
Insomnia Profound sleep deprivation Supports general well-being by easing distress

Eligibility and Restrictions for Use

The eligibility profile for Distraneurine (clomethiazole) is strictly defined by regulatory documents, categorizing populations into those approved, restricted, and contraindicated.

Contraindicated Populations

Use is absolutely prohibited for patients diagnosed with acute pulmonary insufficiency or those with a known hypersensitivity to the drug or its components. The medicine must also not be used by individuals actively consuming alcohol, due to the critical risk of respiratory depression. Additionally, patients with rare hereditary problems of fructose intolerance are contraindicated.

Restricted and Conditional Use

Great caution must be observed in patients with gross liver damage or decreased liver function, and in individuals known to be addiction prone or with a history of drug abuse. Caution is advised for patients with chronic renal disease, sleep apnoea syndrome, or chronic pulmonary insufficiency.

Age and Reproductive Status

The safety and efficacy of clomethiazole has not been established in children and adolescents under 18 years of age, and its use is not recommended. In the elderly population, caution is specifically advised due to altered drug elimination. During pregnancy and lactation, use is not recommended unless the potential benefit outweighs the possible hazard to the infant, as officially documented.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory information for Clomethiazole (Distraneurine) establishes two primary interaction categories: pharmacodynamic potentiation and pharmacokinetic inhibition.

Pharmacodynamic Potentiation and Restrictions

Co-administration with Centrally Acting Depressant Drugs (e.g., Benzodiazepines, other sedatives) leads to additive CNS depressant effects. The combination with alcohol, particularly at high doses, is explicitly contraindicated and may prove fatal due to the risk of severe cardiorespiratory depression.

Pharmacokinetic and Procedural Interactions

Classification Interacting Entity Interaction Outcome
Metabolic Inhibition Cimetidine Inhibits metabolism, resulting in increased blood/plasma levels of Clomethiazole.
Physical Incompatibility Plastic Materials Sorption of the active substance onto plastics (e.g., IV equipment) is known, potentially affecting the administered dose.
Population-Specific Moderate Liver Disorders Causes delayed elimination and increased systemic availability of the drug.

For the oral liquid formulation, regulatory documents mandate that the solution, once diluted, must be administered immediately and not stored. The co-administration of Diazoxide is also restricted due to a reported adverse neonatal reaction.

Mechanism of Action

Primary Biological Target: GABA A Receptor Complex

Clomethiazole acts as a positive allosteric modulator at the GABA A receptor complex. Specifically, this modulation increases the receptor's affinity for the endogenous inhibitory neurotransmitter GABA. The primary binding site is located on GABA A receptors containing the alpha1 subunit, which are widely distributed throughout the central nervous system.


Mechanistic Cascade: Hyperpolarization and Excitability

This interaction leads to an increase in the frequency and duration of chloride ion channel opening . The enhanced chloride ion influx across the neuronal membrane causes hyperpolarization of the post-synaptic neuron. This electrical change decreases the likelihood of an action potential, and the resulting reduction in overall neuronal excitability is the direct biochemical consequence of clomethiazole's action on the GABA A receptor.

Dosage and Administration Information

The administration of Distraneurine (Chlormethiazole) must strictly follow the instructions provided by a healthcare professional.

Administration Method

The medicine is for oral use and is available as soft capsules (192 mg clomethiazole base) and as an oral solution.

  • Capsules: Must be swallowed whole with water. The capsules should not be chewed, crushed, or broken.
  • Oral Solution: The liquid form must be diluted with water or juice before being swallowed immediately. Plastic containers should not be used for mixing.

Official Dosing Schedules

Dosage must be precisely adhered to and is generally kept to a minimum duration.

Usage Context Initial Dosage and Schedule (Adults)
Restlessness/Agitation (Elderly) One capsule three times daily.
Severe Insomnia (Elderly) One to two capsules before going to bed. The lower dose should be attempted first.
Acute Alcohol Withdrawal Highly individualized; generally, a high initial dose is prescribed, followed by gradual reduction.

Course Duration and Discontinuation

Treatment with this medication is intended for short-term use only and must be reviewed regularly by a healthcare provider.

  • Maximum Duration: Administration for more than nine to ten consecutive days is generally not recommended.
  • Discontinuation: The medicine must be discontinued gradually to avoid withdrawal effects. Abrupt cessation should be avoided.

Population-Specific Rules

  • Elderly Patients: The dose for insomnia may be reduced if drowsiness is experienced in the morning.
  • Children and Adolescents: The safety and effectiveness of this medicine in individuals under 18 years of age have not been established.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Distraneurine


Evidence for Acute Alcohol Withdrawal Syndrome (AWS)

Research explored Clomethiazole in the context of short-term outcomes related to Acute Alcohol Withdrawal Syndrome (AWS), a condition characterized by periods of heightened symptom activity. Studies exploring this area have included short-term Randomized Controlled Trials (RCTs), where adult inpatients admitted for detoxification were observed. Outcomes evaluated in these trials included the measurement of withdrawal symptom severity using standardized clinical scales and the assessment of the time elapsed until acute symptom stabilization.

The studies monitored the severity of physical and mental withdrawal symptoms. Trials were conducted during periods of increased symptom activity and reported how symptoms evolved in the observed populations, with the studies including comparisons against other treatments studied. Methodological heterogeneity across trials means evidence quality varies across studies, and there is limited information for long-term outcomes, such as sustained recovery or readmission rates following discharge.


Evidence for Short-Term Insomnia and Severe Agitation

Clomethiazole was studied for the evaluation of symptoms related to severe restlessness, agitation, and profound, short-term insomnia. Research exploring these outcomes has largely been synthesized through Systematic Reviews and Meta-Analyses, which consolidate data from several short-term clinical trials. The studies examined outcomes related to systemic or physiological imbalance, such as sleep duration and quality.

The research primarily included the older adult population (patients 60 years) experiencing insomnia. Findings indicate patterns related to changes measured during the study period. A key limitation is that the follow-up durations were limited in these studies, reflecting the fact that the drug was evaluated in settings designed for very short-term usage (e.g., 3 to 7 nights). The results, therefore, apply only to the populations studied, and long-term effects are not fully established.


Understanding Research Gaps and Uncertainties

Despite the existence of multiple RCTs and systematic reviews, certainty remains low in specific areas. The research highlights what is known—and what is still uncertain. Findings were mixed or inconsistent across some comparative trials, particularly where research assessed subtle differences between the treatments studied.

Key research limitation frames include the consistently modest sample sizes in some older studies and the consistent focus on a narrow spectrum of acute conditions. Furthermore, the evidence base provides limited insight into long-term functional recovery or outcomes related to the sporadic or intermittent use of the medication over extended timeframes.

Key Studies & References Clomethiazole for the treatment of alcohol withdrawal syndrome: A systematic review and metanalysis (Schäfer et al., 2022)

Frequently Asked Questions (FAQ)

Common questions about Distraneurine (FAQ)


Q: How long does it typically take for a person to notice the effects of Distraneurine?

A: Official product information describes Distraneurine as a sedative-hypnotic used for acute, severe conditions like agitation and short-term insomnia. Its pharmacological profile is consistent with medicines intended for rapid action in acute settings. While the exact time it takes to feel the effects is not typically listed on patient leaflets, its designated use in acute settings suggests a fast onset.


Q: What is the purpose of the black box warning on Distraneurine's label, if any?

A: Regulatory safety documents contain serious warnings related to Distraneurine's use, particularly the risk of fatal cardiorespiratory collapse when combined with alcohol or other central nervous system depressants. There is also the risk of severe withdrawal symptoms if the medicine is stopped abruptly after long-term use. The serious warnings described are consistent with the type of content that regulatory bodies highlight prominently in safety advisories, which may include a Black Box Warning.


Q: Can Distraneurine be taken by people with kidney concerns?

A: According to official product information, caution is advised for individuals who have chronic renal disease, which refers to long-term kidney issues. This medicine's use is contingent upon the assessment of a healthcare professional, as the medicine may require specific handling or consideration in this population.


Q: What precautions are advised for people with liver concerns while using Distraneurine?

A: Regulatory documents state that great caution is needed for patients with gross liver damage. This is because the sedative effects of the medicine could potentially mask the early signs of hepatic coma (a severe complication of liver disease). Use in this patient group is advised to be carefully monitored.


Q: Are there studies on the long-term use of Distraneurine?

A: Official research and product information consistently limit the claims to short-term outcomes, such as a maximum treatment duration of nine to ten consecutive days. Official product information notes that long-term effects are not fully established, reflecting the drug's short-term focus and evaluation in acute settings.


Q: What is the expected experience when first starting the medicine?

A: Official documents list certain effects as common when beginning treatment. These include nasal congestion, conjunctival irritation (eye irritation), and excessive sedation (feeling very drowsy). These common effects are noted as being most likely to occur with the initial doses of the medicine.


Q: Is Distraneurine available over-the-counter?

A: No, Distraneurine (chlormethiazole) is designated as a prescription-only medicine (POM) in regulatory systems. This means the medicine must be prescribed by a licensed healthcare professional and is not available for purchase without a prescription.


Q: Do official documents classify Distraneurine as a controlled substance?

A: The classification of Distraneurine varies by country. For example, in the United Kingdom, chlormethiazole is classified as a Class C controlled drug. In the United States, it is labeled as Prescription-only, meaning its distribution and use are strictly governed by prescription rules.


Q: Why do some people refer to Distraneurine as a 'sedative'?

A: The drug is officially classified as a sedative-hypnotic and anxiolytic (anti-anxiety medicine) by regulatory systems. Its approved purpose includes relieving symptoms of severe agitation and restlessness by modulating activity in the central nervous system, which aligns with the effects of a sedative.


Q: Can older adults use Distraneurine?

A: Yes, the medicine is approved for specific uses like restlessness and insomnia in the elderly population. However, official information advises specific caution for older adults due to the increased potential for excessive sedation and changes in how their bodies process the drug.


Q: Does Distraneurine affect blood pressure?

A: The official advisories include cautions regarding the potential for cardiorespiratory collapse (a severe event involving the heart and lungs) when the drug is used with other depressants. However, non-severe effects on routine blood pressure are generally not highlighted in the summary documentation for general patient information.


Q: Are there research papers showing Distraneurine is helpful for anxiety?

A: Authoritative research overviews focus on evidence for the drug's use in acute alcohol withdrawal, agitation, restlessness, and short-term insomnia. The evidence base reviewed in regulatory documents does not explicitly list research or claims regarding general anxiety disorder.


Q: Does the time of day a person takes Distraneurine matter?

A: Yes, the time of day matters depending on the intended use. Official dosing information indicates that when the medicine is prescribed for severe insomnia, it is specifically taken before going to bed to match the drug's effect with the need for sleep.


Q: Is there a generic version of Distraneurine available?

A: The active ingredient is Clomethiazole. While this is the generic name for the substance, the availability of an officially approved generic drug product—a non-brand name option—varies depending on the country and market. Other trade names, like Heminevrin, contain the same active ingredient.


Q: What is the chemical name of the active ingredient in Distraneurine?

A: The active ingredient is Clomethiazole. The formal chemical name for this substance is 5-(2-chloroethyl)-4-methyl-1,3-thiazole.


Q: Are there any reports of mood changes associated with Distraneurine?

A: Official adverse reaction documents list Paradoxical excitement and Confusion as rare reported effects. These are changes that fall under the categories of nervous system and psychiatric disorders, representing an alteration in mental state or mood.


Q: What is the legal status of Distraneurine outside of the US?

A: The drug is generally designated as a prescription-only medicine (POM) in most major international jurisdictions, such as the UK and Canada. It is subject to strict prescription rules and in some cases, specific controlled substance classifications.


Q: What are the general expectations about the course of treatment with Distraneurine?

A: The medicine is intended for short-term use only, reflecting its role in managing acute symptoms. Regulatory documents generally recommend that administration should not exceed nine to ten consecutive days.


Q: How do official sources describe the potential for tolerance with Distraneurine?

A: Official safety information indicates that physical dependence and tolerance—where higher doses are needed for the same effect—may occur. This potential is specifically noted following the prolonged administration of high doses.


Q: Are there any known allergic reactions associated with Distraneurine?

A: Hypersensitivity (an allergic response) to the drug or its components is listed as an absolute contraindication, meaning the medicine must not be used by individuals with this history. In addition, Anaphylactic reactions, which are severe allergic reactions, are listed among the rare adverse reactions in official documents.


Q: What common over-the-counter cold medicines might interact with Distraneurine?

A: The official label explicitly warns against taking Distraneurine with other Centrally Acting Depressant Drugs, such as certain sedatives. This is because combining them can lead to additive CNS depressant effects, potentially causing excessive drowsiness and breathing difficulties. Patients are advised to review all ingredients in cold medicines for central nervous system depressants, as co-administration is explicitly cautioned against.


Q: Is it normal to feel dizzy or drowsy after starting Distraneurine?

A: Excessive sedation is listed in regulatory documents as a common side effect of the medicine, which covers the feeling of drowsiness. The general term headache is also listed as a common effect when starting treatment.


Q: How long do the effects of Distraneurine usually last after taking it?

A: Official product information contains pharmacokinetic data, which describes how the body processes the drug. This information cites the drug's elimination half-life as approximately 3.6 to 5 hours. The half-life is a measure of the time required for half of the dose concentration to be eliminated from the body.

How should Distraneurine be stored and disposed of?

Storage and Disposal Requirements

Distraneurine (clomethiazole capsules) must be stored below 25°C (77°F) and should never be frozen. The medication requires protection from light and moisture and must remain in its original container to maintain its stability and integrity.

Official Handling and Disposal

All medicines must be stored out of the sight and reach of children to prevent accidental ingestion. Unused or expired Distraneurine should be disposed of using an official drug take-back program.

If a take-back program is unavailable, disposal may follow official household guidelines, which typically involve mixing the medicine with an undesirable substance (e.g., dirt, coffee grounds) and placing it in a sealed container before discarding it in the trash. It is explicitly prohibited to dispose of the product via wastewater (flushing down toilets or sinks).

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

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