Хорал

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Хорал

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Overview of Хорал

Quick Facts

Feature Detail
Drug Class Sedative-Hypnotic
Active Ingredient Chloral Hydrate
Primary Uses Short-term insomnia, procedural sedation (especially in pediatrics)
Status Largely replaced by safer alternatives; prescription-only, controlled substance

Хорал is a brand name for the generic compound Chloral Hydrate, which is one of the oldest synthetic sedative-hypnotic drugs, first introduced into medicine in 1869. It is classified as a central nervous system (CNS) depressant. In the body, Chloral Hydrate is rapidly metabolized to its active form, trichloroethanol, which is responsible for the drug's effects.

Mechanism of Action and Use

Trichloroethanol is believed to exert its action by enhancing the effects of the inhibitory neurotransmitter Gamma-aminobutyric acid (GABA) in the brain, similar to how benzodiazepines and barbiturates work. This mechanism leads to sedation, reduced anxiety, and the induction of sleep.

Historically, Chloral Hydrate was widely used for the short-term treatment of insomnia and to manage anxiety. Its current, though limited, medical use is often for sedation in children or adults undergoing diagnostic, dental, or minor medical procedures, as it is effective with a relatively rapid onset of action. However, due to its narrow therapeutic index, potential for dependence, rapid development of tolerance, and the availability of safer, more effective alternatives, its use has significantly declined, and it has been withdrawn from the market in some countries, including the United States.

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What side effects are possible with Хорал?

Possible side effects and safety information

The safety profile of Chloral Hydrate (Хорал) outlines adverse reactions grouped by the body systems they affect, emphasizing critical constraints on use and risks associated with prolonged exposure, as documented in regulatory sources.

Adverse Reaction Categories

Side effects are officially classified within several System-Organ Classes. For this medicine, the frequency of most reported effects is typically classified as Not Known, meaning incidence cannot be reliably estimated from available data in current official documents.

System-Organ Class Common Regulatory-Listed Effects (Examples)
Nervous System Disorders Drowsiness, confusion, impaired coordination (ataxia), vertigo, headache.
Gastrointestinal Disorders Gastric irritation, nausea, vomiting, diarrhea, abdominal distension.
Cardiac Disorders Arrhythmias (irregular heartbeat), QTc prolongation, bradycardia.

Serious Adverse Reactions and Safety Constraints

Regulatory documents highlight the potential for severe reactions and place restrictions on the medicine's use. Serious reactions include respiratory depression, severe cardiac arrhythmias (such as ventricular dysrhythmias), and potentially severe hepatic or renal injury.

Use is contraindicated in patients with pre-existing severe heart problems, severe liver or kidney problems, or active inflammation/ulceration of the stomach or gullet. This is a high-level safety limitation defined in regulatory labeling.

Duration- and Population-Specific Safety Patterns

The risk of developing tolerance and dependence is associated with prolonged treatment. Abrupt cessation following extended use can lead to severe withdrawal symptoms, including delirium. Specific safety considerations apply to certain groups: Older adults may be more susceptible to CNS effects like confusion and ataxia, which increases the risk of falls. In neonates and infants, documented risks include indirect hyperbilirubinemia and bradycardia.

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Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory information for Хорал (Chloral Hydrate) overdose emphasizes severe, life-threatening complications that require immediate medical intervention.


Documented Manifestations and Severe Outcomes

Overdose manifestations primarily affect the central nervous system, leading to deep coma and respiratory depression (slow or shallow breathing). The drug also impacts the cardiovascular system, causing hypotension (low blood pressure) and potentially lethal cardiac arrhythmias (abnormal heartbeat). Serious toxic effects documented include gastric necrosis from local irritation and subsequent damage to the liver and kidneys. Officially reported data indicates doses as low as 4 grams have caused serious complications, and 10 grams may be fatal.


Required Emergency Action

Regulatory documents mandate that in the event of a suspected overdose, individuals must contact their nearest hospital casualty department or tell their doctor immediately. Urgent medical help is required for any sign of overdose, especially difficulty in breathing or the onset of an irregular heart rhythm.

Management requires symptomatic and supportive treatment, as no specific agent is available to reverse the effects. The documented risk of permanent damage or death from overdose necessitates special attention for the pediatric population.

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Therapeutic Uses of Хорал

The medication is relevant for easing symptoms related to heightened physiological activity. This application is generally applicable within clinical settings that involve heightened systemic burden and when supportive symptom management is appropriate.


What Хорал treats: Main Uses and Benefits

Хорал is commonly used to help with the symptomatic discomfort of transient or simple insomnia, primarily when patients experience difficulty initiating sleep. Its therapeutic uses also extend to providing procedural support and assistance for patients undergoing diagnostic tests, or those requiring management of acute, high-intensity agitation in controlled environments.

“The benefit is focused on temporary, short-term needs for symptom management rather than long-term handling of complex, chronic conditions.”

In these scenarios, the medication addresses the symptom cluster of pre-procedural anxiety, agitation, and restlessness. It provides supportive relief that helps patients cope more steadily with symptom fluctuations by promoting a feeling of restfulness and easing distress, assisting with maintaining comfort and stability during symptomatic periods. This is especially relevant for pediatric patients requiring stillness for tests like ЕЕГ or МРИ, supporting necessary patient stillness that can assist in addressing symptoms related to heightened physiological activity during procedures.

Quick Fact: Relief for Situational Distress
Primary Focus: Symptom management of acute sleep difficulties and pre-procedural anxiety in controlled settings.
Key Benefit: Contributes to improved day-to-day comfort during symptomatic periods and may assist with patient willingness to tolerate minor procedures.

Regulatory References

  1. NIH MedlinePlus overview of Chloral Hydrate
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Eligibility and Restrictions for Use

Who Can and Cannot Use Хорал?

Eligibility for using Хорал (Chloral Hydrate) is strictly defined by regulatory authorities and is subject to several major exclusions and restrictions.


Absolute Contraindications (Must Not Use)

Regulatory documents state that this medicine is contraindicated and must not be used by patients with:

  • Severe Organ Impairment: This includes severe hepatic (liver) failure, severe renal (kidney) impairment, or severe cardiac disease.
  • Active Gastrointestinal Disease: Patients with active gastritis, oesophagitis, gastric ulcers, or duodenal ulcers are excluded.
  • Metabolic Conditions: Individuals with porphyria must not use the medicine.
  • Reproductive Status: Use is contraindicated during both pregnancy and lactation (breastfeeding).

Age-Group and Restricted Use

The product is contraindicated for all children under 2 years of age, as safety and efficacy have not been established. For children aged 2 to 17 years, use is heavily restricted and is generally limited to short-term treatment of severe insomnia associated with a suspected or definite neurodevelopmental disorder, requiring specialist supervision. Adults and adolescents (12 years and older) are permitted to use the medicine for short-term, severe insomnia only after non-drug treatments have failed. Caution is required when prescribing to the frail elderly or those with mild to moderate hepatic or renal impairment.

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What should I know about interactions with other medicines?

Interactions with other medicines and products

The official regulatory profile for Chloral Hydrate primarily documents interactions related to pharmacodynamic reinforcement and altered drug exposure. Co-administration with other Central Nervous System (CNS) depressants, including narcotic analgesics, sedatives, and antipsychotics, results in enhanced central depressive effects and should be avoided due to the increased risk of excessive sedation. The regulatory labels also restrict the co-administration of Alcohol (Ethanol), as it may significantly potentiate the drug’s sedative properties.

A key documented interaction is the effect on oral Coumarin anticoagulants (e.g., Warfarin). Chloral Hydrate may cause a transient increase in anticoagulant activity by displacing it from plasma proteins, requiring careful monitoring of prothrombin time when starting or stopping the regimen. Co-use with agents that prolong the QT interval is officially associated with the risk of cardiac arrhythmias.

Furthermore, official statements note that administration followed by intravenous Furosemide may lead to a specific reaction characterized by hot flashes and variable blood pressure. Chloral Hydrate is formally contraindicated in patients with severe hepatic impairment and severe renal failure due to the risk of reduced clearance of the active metabolite and resulting increased systemic exposure.

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Mechanism of Action

Dual-Action Mechanism on Nociceptive Signaling

This medication operates through a dual-action mechanism that involves two distinct biological processes: μ-Opioid Receptor (μ-OR) agonism and inhibition of monoamine reuptake. This integrated approach modulates nociceptive input at multiple points in the central nervous system (CNS), resulting in a reduction in nociceptive signal transmission.

Opioid Receptor Engagement and Direct Inhibition

The core mechanism involves the drug's active metabolite acting as an agonist on μ-ORs, which are present in the spinal cord and brainstem. This binding initiates a molecular cascade that hyperpolarizes nerve cells and prevents the release of excitatory neurotransmitters. This directly blocks the electrical signal that relays nociceptive input to the brain, producing the physiological consequence of reduced nociceptive perception.

Monoamine Modulation and Descending Pathway Facilitation

The mechanism also includes the inhibition of the Serotonin and Norepinephrine Transporters (SERT and NET) by the parent compound. Preventing the reuptake of these neurotransmitters increases their concentration in the synaptic cleft of the spinal cord. This enhances the activity of the Descending Inhibitory Pain Pathways, leading to a resulting suppression of nociceptive signaling in the dorsal horn.

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Dosage and Administration Information

The administration of Chloral Hydrate (Хорал) follows specific regulatory instructions regarding its route, dosage, timing, and duration of use. The medicine is primarily delivered via the oral route as a capsule or syrup, and the rectal route via suppository is also officially approved.

To help prevent gastric irritation, the oral formulations must be taken with a full glass of water, fruit juice, or milk, or immediately after meals. The liquid syrup solution requires dilution with a beverage immediately before ingestion, and a calibrated measuring device must be used to ensure accurate dosing.

The use is strictly limited to short-term duration, typically not exceeding two consecutive weeks for continuous hypnotic use. Following prolonged treatment, the dose must be slowly tapered before discontinuation.

Official Dosing and Frequency

The standard dosing for Хорал is determined by the administration context, with the total daily dose restricted to a maximum of 2 g for adults.

Context of Use Standard Labeled Dose Frequency Pattern
Adult Hypnotic 500 mg to 1 g Single dose, 15 to 30 minutes before sleep
Adult Sedative 250 mg Up to three times daily
Pediatric Sedation 25 to 50 mg/kg Single dose, 30 minutes prior to procedure

For older adults, official guidance mandates a lower initial hypnotic dose, typically starting at 250 mg. Pediatric use is generally established for children ages two years and older, with a maximum single dose of 1 g.

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Recent Clinical Evidence

Research evidence / Overview of Studies for Хорал

Evidence for use in Procedural Sedation

Clinical research, including multiple Randomized Controlled Trials (RCTs) and Systematic Reviews, has extensively explored methods for achieving patient stillness in short, acute situations, particularly when undergoing non-invasive diagnostic tests such as medical imaging (MRI) or electroencephalography (EEG). Researchers specifically examined whether the procedure was completed without movement interruption, and researchers monitored the time it takes for the measured physiological response to begin and its total duration.

The findings describe patterns observed in the studies where this medication was observed in these settings. Studies reported measurements of procedural completion rates that varied across different age groups and procedures. Some trials described patterns indicating a relatively rapid onset time for the measured physiological response. Reported outcomes regarding functional status and recovery were short-term, typically observed for only a few hours post-procedure.

What remains uncertain is how results apply only to the populations studied during the acute procedure, and the evidence base provides limited information on how to compare the results of this medication against many newer, alternative sedative agents. Research notes a decrease in measured outcomes in children older than 48 months, pointing to uncertainty in measured outcomes for older pediatric groups.


Evidence for use in Short-Term Insomnia

Chloral Hydrate was evaluated in studies relevant in trials assessing short-term or episodic symptom patterns, such as transient or severe insomnia. The evidence primarily comes from older double-blind crossover studies and some more recent open-label trials. Research explored short-term symptom changes, focusing on patient-reported outcomes describing perceived discomfort and disruption to sleep patterns.

In these limited research scenarios, studies report how symptoms evolved in the observed populations over very defined and brief time intervals, including the time required for participants to fall asleep and patterns related to measured total sleep time compared to baseline measurements. However, many of these findings are not contemporary, meaning they rely on methods and standards that predate current regulatory requirements for evaluating sleep medications.

Consistency and Research Gaps

The evidence quality varies across studies and is broadly categorized as Low to Moderate. The most significant research gaps include the absence of modern, large-scale Randomized Controlled Trials that was studied for this medication. Furthermore, comparative evidence is lacking for many of its uses, and long-term effects are not fully established. This means the research provides context but not individual predictions regarding symptom response.

Key Studies & References

  1. Chloral hydrate - LiverTox - NCBI Bookshelf
  2. CHLORAL AND CHLORAL HYDRATE - IARC Monograph on the Evaluation of Carcinogenic Risks to Humans
  3. Chloral hydrate - Wikipedia (for historical and regulatory status context)
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Frequently Asked Questions (FAQ)

Common questions about Хорал (FAQ)


Q: What ingredients are in the Хорал tablet/capsule?

Official product information clearly distinguishes between the active ingredient, which is Chloral Hydrate, and the inactive ingredients (known as excipients). The inactive ingredients are substances like fillers and binders that help form the medicine but do not contribute to its therapeutic effect. A complete list of all ingredients is provided in the official regulatory documents for the specific formulation.

Q: How long does the effect of a single dose of Хорал typically last?

Studies and official information indicate that the medicine's effects are tied to its active chemical, trichloroethanol, which is produced after ingestion. This compound is reported to have a prolonged clearance time from the body. Because of this, the measured physiological effects of a single dose are reported to last for a duration of approximately 4 to 8 hours in certain populations.

Q: What should I tell my doctor before starting treatment with Хорал?

Official safety warnings indicate that a discussion regarding pre-existing health issues is important before starting treatment with any medication. Regulatory documents highlight conditions such as severe liver or kidney problems, severe heart disease, stomach inflammation or ulcers, and whether a person is pregnant or breastfeeding. These conditions are noted in the product labeling as major exclusions where the medicine is typically contraindicated.

Q: Is there a patient leaflet (package insert) available for Хорал online?

Yes, the factual basis for the patient leaflet is available from authoritative government sources. Information like the Summary of Product Characteristics (SmPC) is published and maintained by regulatory agencies like the European Medicines Agency or the FDA/NIH, providing comprehensive details about the drug.

Q: Why might a doctor switch me from an older drug to Хорал?

Regulatory documents describe the drug's approved uses in specific, limited settings, such as certain cases of procedural sedation where a rapid onset of measured physiological response has been described in studies. The decision to select this drug is based on a professional assessment of these specific circumstances, even though many safer alternatives exist.

Q: Can I take other drugs for my condition while on Хорал?

Official drug labels contain warnings regarding co-administration with other medicines and products. Official labels identify Central Nervous System (CNS) depressants (which includes some narcotic analgesics and sedatives) and alcohol as substances that should not be combined with this medicine, as this may lead to an increased risk of excessive sedation or respiratory depression.

Q: Where is the research on Хорал usually published?

The research evidence for the medicine is primarily found in peer-reviewed medical literature. This includes reports from clinical research such as Randomized Controlled Trials (RCTs) and Systematic Reviews that have examined its limited use in procedural sedation and short-term insomnia.

Q: Does Хорал help with symptoms other than the primary condition?

The medicine's use is strictly defined by regulatory approval, which limits its official indications. According to the official labels, the drug is approved only for short-term insomnia and procedural sedation. The product labeling does not include other secondary symptoms or conditions.

Q: What happens if I forget to take a dose of Хорал?

Official patient guidance, often found in sources like MedlinePlus, includes statements about missed doses that generally indicate a missed dose should be skipped entirely. The instruction provided is often to resume the next scheduled dose at the correct time, rather than taking the missed dose.

Q: What should be done if an allergic reaction to Хорал is suspected?

Hypersensitivity is listed in the official documents as a condition where the medicine must not be used. In case symptoms of an allergic reaction occur—such as skin rash, itching, confusion, or difficulty breathing—patient safety sheets indicate the need to seek immediate medical attention.

Q: Why are there different strengths (e.g., 5mg, 10mg) of Хорал?

The medicine is produced in different marketed strengths, such as capsule and syrup forms. The existence of these different strengths allows healthcare professionals to accurately match the dose to the prescribed amount needed for the patient. This helps accommodate the specific dosing guidelines for adults, older adults, or pediatric patients.

Q: Can people who are lactose intolerant take Хорал?

The potential for the medicine to contain lactose or other dietary-restricted components is addressed in the official list of inactive ingredients (excipients). Official regulatory documents identify all components in the formulation. Individuals with known intolerances can review this specific list of inactive ingredients as part of their assessment of the formulation.

Q: How does the body process and eliminate Хорал?

Official pharmacological data explains that the medicine is rapidly metabolized in the body to form its active compound, trichloroethanol. This active substance is then eliminated primarily through the urine and, to a lesser extent, through the feces.

Q: Can lifestyle changes enhance the effect of Хорал?

Official regulatory text for short-term insomnia use states that the medicine is designed to be used as an adjunct to non-pharmacological therapies. This includes management strategies like behavioral therapy and sleep hygiene, which suggests these factors are considered relevant to overall symptom management.

Q: Do people need regular blood tests while taking Хорал?

Specific regulatory monitoring guidelines advise that certain tests may be necessary during treatment. For instance, Liver Function Tests (LFTs) may be recommended if a patient is receiving regular dosing. Close monitoring of vital signs such as respiration, heart rate, and blood pressure is also advised.

Q: Can taking Хорал interfere with other medical tests?

Official documents note that the medicine may affect the results of specific laboratory tests. One example is its known ability to cause a transient increase in anticoagulant activity, which requires careful monitoring of the patient's prothrombin time blood test.

Q: Does Хорал carry any black box warnings from the FDA (or similar agency)?

The drug is associated with severe risks, including respiratory depression and cardiac toxicity, and it has a narrow therapeutic window. Although commercially available products were withdrawn from the US market, official regulatory documents for the active ingredient do not currently include a formal FDA Black Box Warning.

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How should Хорал be stored and disposed of?

How to Store and Dispose of Хорал (Chloral Hydrate)

Storage of Chloral Hydrate must follow specific regulatory requirements to maintain product integrity and safety.

Storage and Handling Requirement Official Condition
Temperature Range Store at controlled room temperature, typically between 15 C and 30 C. Do not freeze.
Protection Keep the container tightly closed and protect the product from light and moisture.
Stability Period Liquid formulations must be used within 28 days after opening the container.
Child Safety Keep securely out of the reach and sight of children due to its status as a controlled substance.
Disposal Dispose of unused or expired product according to local regulatory requirements; do not discard into household drains or waterways.

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

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