Hydroxyzinum Espefa

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Hydroxyzinum Espefa

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 Hydroxyzinum Espefa

Quick Facts

Property Description
Active ingredient Hydroxyzine dihydrochloride
Form Film-coated tablets, Oral solution/syrup
Pharmacological class First-generation antihistamine (H1-antagonist)
General purpose Relief of anxiety, tension, and itching (antipruritic)
Origin Synthetic compound

What Type of Medicine is Hydroxyzinum Espefa and Its Core Classification?

Hydroxyzinum Espefa is a specific, prescribed medicinal product manufactured by Espefa, containing the active ingredient Hydroxyzine dihydrochloride. It is formally classified as a first-generation antihistamine (H1-receptor antagonist) and belongs to the broader pharmacological group known as psycholeptics. This classification signifies its primary action of blocking histamine receptors throughout the body, while simultaneously exhibiting a notable influence on the Central Nervous System (CNS). This dual profile is characterized by Hydroxyzine’s molecular structure, which allows it to cross the blood-brain barrier. The compound works by decreasing activity in certain regions of the brain, which supports its use for tension and as a mild sleeping aid.


Composition, Form, and General Purpose

Hydroxyzinum Espefa is formulated as a single-ingredient product (monotherapy), ensuring its effects are exclusively derived from the Hydroxyzine dihydrochloride compound, along with necessary inactive excipients. This brand is manufactured for oral administration and is supplied in different forms, including film-coated tablets and a liquid oral solution or syrup. This variety ensures flexibility in delivery, making the syrup form particularly suitable for pediatric patients or individuals who struggle with swallowing tablets. The core H1 blocking action provides effective antipruritic relief by diminishing the sensation of severe itching often linked to allergic skin conditions. Additionally, its primary benefit is derived from its calming action, which assists in relieving symptoms associated with anxiety and psychological tension, such as feeling restless or overly worried.

Regulatory References

  1. MedlinePlus

What side effects are possible with Hydroxyzinum Espefa?

Possible Side Effects and Safety Information

The officially documented safety profile for Hydroxyzinum Espefa (Hydroxyzine dihydrochloride) is structured by regulatory authorities around two main categories of effects: those related to the Central Nervous System (CNS) and those related to cardiac risk, with all effects classified by frequency and system.

Frequency-Classified Adverse Reactions

The most frequently reported adverse reactions reflect the medicine's CNS properties. Drowsiness is classified as Very Common, meaning it affects more than 1 in 10 patients. Common reactions (affecting 1 to 10 in 100 patients) include sedation, dry mouth, fatigue, headache, and dizziness. Effects classified as Rare include confusion, tremor, convulsions, tachycardia, and urinary retention.

Serious Adverse Reactions and Safety Constraints

Official regulatory documents mandate the inclusion of the risk of QT interval prolongation and Torsade de Pointes, a rare but potentially serious type of abnormal heart rhythm classified under Cardiac Disorders. The presence of this risk means the medicine is contraindicated (should not be used) in patients with a known prolonged QT interval or those with pre-existing cardiac conditions that predispose to arrhythmias.

Population-Specific Safety Considerations

Regulatory warnings explicitly define caution for certain patient groups. Older adults are generally advised against use, or require use of the lowest possible effective dose, due to a higher risk of adverse reactions, including CNS depression and anticholinergic effects. Similarly, patients with existing renal or hepatic impairment require particular caution, as altered drug clearance can increase the likelihood of systemic side effects. Drowsiness is noted as often being transitory and may lessen with continued therapy.

Overdose and Emergency Response

The official regulatory documentation for Hydroxyzine overdose strictly defines manifestations across the Central Nervous System (CNS) and the Cardiovascular System. Documented presentations commonly involve significant CNS depression, including hypersedation, stupor, and the possibility of convulsions. Less specific signs such as nausea and vomiting are also listed. Due to the potential for severe outcomes, it is mandated to seek emergency medical attention immediately upon suspicion of overdose, and the local Poison Help line or equivalent service should be contacted.

The most critical regulatory concern is cardiovascular toxicity. Severe manifestations include the risk of QT prolongation and the potentially fatal ventricular arrhythmia, Torsade de Pointes, as well as reports of cardiac arrest. Therefore, ECG monitoring is recommended in all cases of suspected overdose, alongside frequent monitoring of vital signs and close patient observation. Management protocols are defined by the absence of a known specific antidote and the requirement for supportive care. This includes procedures like immediate gastric lavage and the use of intravenous fluids and specific vasopressors (Levarterenol or Metaraminol) for hypotension, with the explicit regulatory instruction to not use epinephrine. A population-specific note identifies elderly patients as having an increased risk for confusion and severe over-sedation due to altered pharmacokinetics. The entire profile is structured to emphasize the necessity of urgent, monitored intervention.

Therapeutic Uses of Hydroxyzinum Espefa

What Hydroxyzinum Espefa Treats: Main Uses and Benefits

The primary therapeutic utility of Hydroxyzinum Espefa is applied in contexts where additional symptomatic support is needed across key domains where heightened physical or emotional distress causes significant discomfort; it generally provides supportive relief when symptoms interfere with routine activities.

The medication is commonly used across conditions presenting with acute episodes, including the symptomatic relief of anxiety and tension associated with psychoneurosis. It is also relevant for easing pruritus associated with allergic conditions like chronic urticaria and dermatoses, and is used to help with calming before surgical procedures.

Easing Psychological Tension and Acute Nervousness

This domain addresses the medication's role in managing acute, pronounced symptoms of psychological tension, such as excessive worrying and persistent restlessness. It generally helps to ease the overall burden of these distressing emotional manifestations, supporting general well-being during symptomatic phases.

Symptomatic Relief of Severe Allergic Itching

Hydroxyzinum Espefa offers symptomatic relief that helps manage symptom intensity related to physical discomfort, supports patients during episodes of heightened discomfort, and contributes to improved comfort during symptomatic periods.


Quick Fact Block

Quick Fact: Relief for Tension and Anxiety Quick Fact: Relief for Allergic Itching Quick Fact: Relief for Procedural Distress
Plays a role in managing excessive worry and restlessness. Applied to manage symptom intensity of chronic hives and dermatoses. Assists with temporary symptomatic assistance before surgical or diagnostic procedures.

Eligibility and Restrictions for Use

Who can and cannot use Hydroxyzinum Espefa?

Hydroxyzinum Espefa is not suitable for all populations and is strictly governed by official regulatory labeling. Use is absolutely contraindicated for patients with known hypersensitivity to the drug, cetirizine, levocetirizine, or other derivatives. It must also not be used by individuals with a known history of QT interval prolongation or other serious cardiac risk factors, and is strictly prohibited in patients with porphyria.

The medicine is contraindicated for women who are pregnant or breastfeeding.


Eligibility by Age and Condition

  • Pediatrics and Adults: The medicine is established for adults and children starting at 12 months of age for specific indications, as documented in regulatory guidelines.
  • Elderly: Use is generally not recommended for patients aged 65 and over, and a limited maximum daily dose applies if use is considered necessary.
  • Organ Function: Patients with moderate or severe renal impairment or hepatic impairment require a mandatory dosage reduction due to decreased drug elimination.
  • Caution: Caution is required when using this medicine in patients with conditions like angle-closure glaucoma, prostatic hyperplasia, urinary retention, or a predisposition to convulsions, as these are noted limitations in official prescribing information.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The interaction profile of Hydroxyzinum Espefa, containing Hydroxyzine dihydrochloride, is defined by official regulatory documents based on two primary risks: additive central nervous system (CNS) effects and potential cardiovascular risk.

Documented Interaction Restrictions

Category Restriction or Interaction Pattern
Cardiovascular Contraindication Co-administration is formally contraindicated in patients with a known prolonged QT interval and with other medicines that are known to prolong the QT interval, due to the documented risk of Torsade de Pointes (TdP).
Pharmacodynamic Potentiation A potentiating action is documented when used concurrently with Central Nervous System (CNS) Depressants (such as narcotics, non-narcotic analgesics, and barbiturates). Regulatory guidance states the dosage of the co-administered CNS depressant should be reduced.
Metabolic Pathway Interaction Hydroxyzine is identified as an inhibitor of the CYP2D6 enzyme, which may lead to an increase in the plasma concentration of other medicines that are substrates for this metabolic pathway.
Alcohol Concomitant use with alcohol should be avoided as it is documented to aggravate the sedative effects and increase the overall CNS effect.
Population-Specific Note The elimination half-life is prolonged in elderly patients, a factor that requires caution when considering concomitant drug therapy due to potential for decreased clearance.

Summary of Profile

Official regulatory information restricts co-administration based on a severe cardiac arrhythmia risk and requires cautious use with medications that share CNS depressant properties. The profile also notes an important pharmacokinetic interaction involving CYP2D6 inhibition, which can increase the exposure of many co-administered medicinal products.

Mechanism of Action

The physiological profile of Hydroxyzinum Espefa is determined by the multi-target interaction of its active compound, Hydroxyzine dihydrochloride. The drug acts primarily as an inverse agonist and antagonist at the Histamine H1 receptor in both central and peripheral tissues. Due to high lipophilicity, the molecule rapidly enters the central nervous system (CNS), resulting in prompt and extensive receptor occupancy. This central H1 antagonism, coupled with secondary antagonism at the Serotonin 5-HT2A receptor, suppresses activity in subcortical brain areas, leading to a reduction of psychomotor activation. Peripherally, H1 receptor blockade interrupts the initial molecular cascade of the allergic response. This mechanism limits histamine's capacity to increase capillary permeability and stimulate peripheral nerve fibers, thereby producing the physiological effects of inhibition of vascular leakage and edema formation and modulation of peripheral cutaneous sensory signaling. The rapid rate of CNS entry dictates the quick onset of the central action; however, the sustained receptor blockade is subject to functional constraints, as central receptor adaptation may occur, causing the level of CNS suppression to diminish with continuous daily exposure.

Dosage and Administration Information

Hydroxyzinum Espefa is administered primarily through the oral route, available as film-coated tablets and an oral solution or syrup. The compound is also approved for administration via deep intramuscular (IM) injection in restricted clinical settings, such as pre-procedural sedation. For oral use, the medication may be taken with or without food and should be swallowed with water.

The dosing regimen is highly dependent on the condition being addressed and patient factors. For the symptomatic relief of anxiety, the regimen typically ranges from 50 mg to 100 mg daily, often administered in divided doses throughout the day. For chronic itching (pruritus), a common starting dose is 25 mg taken at night, with the frequency increasing to three or four times daily as needed, though the maximum daily dose is frequently limited to 100 mg.

A critical principle governing its use is the mandate to employ the lowest effective dose for the shortest possible duration. Specific dosage adjustments are required for certain populations. Older adults are generally recommended to start at approximately half the typical dose, with the total daily dose restricted to 50 mg. Furthermore, patients with hepatic or renal impairment require dose reductions, often ranging from 33% to 50% of the standard regimen, due to changes in the body’s clearance of the compound. Clinical guidelines indicate that the efficacy of continuous use for anxiety beyond four months has not been established.

Recent Clinical Evidence

Research evidence / Overview of studies for Hydroxyzinum Espefa

Evidence for Symptomatic Relief of Anxiety and Psychological Tension

Research has explored the use of this medicine in adult populations with conditions characterized by acute or disruptive episodes of anxiety. The primary evidence base consists of short-term, randomized controlled trials (RCTs). In these studies, researchers monitored changes using established rating instruments, which serve as outcomes related to systemic or functional imbalance.

Studies report how symptoms evolved in the observed populations over defined time intervals, with the main treatment periods typically lasting 12 weeks or less. Systematic reviews of the evidence note that some findings describe patterns observed in the studies where participants experienced measured changes in anxiety scores. The available data often comes from older trials, and the consensus among some reviewers suggests the certainty remains low due to methodological factors and modest sample sizes.

Evidence for Symptomatic Relief of Allergic Pruritus (Itching)

Clinical studies have explored the use of the medicine in patients with conditions where symptoms may vary in intensity, such as chronic hives (urticaria). The research included short-term RCTs, often comparing it with placebo or other medications. Studies monitored patient-reported outcomes describing perceived discomfort and overall outcomes reflecting daily functioning.

Regulatory reviews cite patterns of changes measured during the study period in patients with allergic itching. Research provides insight into short-term changes over defined time intervals, with controlled comparisons typically spanning a few weeks. However, when studies explored how this medicine compares to the majority of newer, non-sedating anti-allergy medicines, comparative evidence is lacking in high-certainty, large-scale trials.

What Remains Uncertain About Hydroxyzinum Espefa Research

The research on this medicine highlights several areas where data are still emerging or where the certainty remains low:

  • The evidence quality varies across studies, and some foundational studies have been criticized for methodological limitations or modest sample sizes.
  • Limited information for long-term outcomes means that patterns of use or maintenance beyond a few months are not fully established.
  • Comparative evidence is lacking in modern, high-quality trials against the newest options for both anxiety and allergies.

Research is ongoing to explore the use of this medicine in diverse settings. Studies help show what has been observed so far, but research does not determine whether an individual will respond similarly.

Frequently Asked Questions (FAQ)

Common questions about Hydroxyzinum Espefa (FAQ)

Q: How quickly does Hydroxyzinum Espefa typically start to produce its calming effect?

According to official product information, the clinical effects of hydroxyzine may be noted as early as 15 to 30 minutes after taking the medicine by mouth. The peak effect often occurs around two hours after administration. This information helps describe the general timeline for the onset of the medicine’s central actions.

Q: What is the expected duration of action for a standard dose of Hydroxyzinum Espefa?

Official pharmacokinetic information indicates that the noticeable effects of a single dose are typically described as lasting for approximately four to six hours. Regulatory data indicates that the compound itself requires a much longer period for complete clearance from the body.

Q: Is Hydroxyzinum Espefa typically a short-term or long-term treatment option?

Official prescribing guidance describes that the medicine's use is governed by the principle of employing the lowest effective dose for the shortest possible duration. Furthermore, the efficacy for continuous use as an anti-anxiety agent has not been formally established in regulatory studies for periods extending beyond four months.

Q: Does Hydroxyzinum Espefa lose its effectiveness over time (tolerance)?

Regulatory studies have not evaluated the medicine’s effectiveness as an anti-anxiety agent for use lasting more than four months. Official documents indicate that the central nervous system suppression caused by the drug may diminish over time with continuous daily exposure.

Q: What happens if someone abruptly stops taking Hydroxyzinum Espefa?

Official post-marketing experience indicates that abruptly stopping the medicine may be associated with risks. Regulatory documents have noted that discontinuation symptoms, such as anxiety, insomnia, headaches, and tremors, have been reported when the drug is stopped without appropriate medical guidance.

Q: What happens if a dose of Hydroxyzinum Espefa is missed?

Official patient instructions describe the procedure for a missed dose: if remembered soon, the dose may be taken. If it is almost time for the next dose, the procedure indicates taking only the next dose. Double or extra doses are described as being generally avoided.

Q: Should people taking Hydroxyzinum Espefa be cautious about operating machinery?

Regulatory warnings describe the need for caution regarding activities that require full mental alertness. This caution is related to the possibility of experiencing drowsiness and other central nervous system effects while taking this medication, which includes driving a car or operating dangerous machinery.

Q: Does Hydroxyzinum Espefa affect performance in cognitive tasks?

Official warnings suggest the medicine may affect cognitive performance. This possibility is linked to common adverse reactions listed in regulatory documents, such as drowsiness, sedation, and dizziness, which may impair the ability to perform skilled tasks.

Q: Is it normal to feel a bit restless or agitated after taking Hydroxyzinum Espefa?

Restlessness or agitation is not listed as a common or rare side effect at the recommended doses in regulatory documents. However, official safety data has reported involuntary motor activity, including tremor and convulsions, when the drug is taken at considerably higher doses than those officially recommended.

Q: Does Hydroxyzinum Espefa commonly cause dry eyes or blurred vision?

Official adverse reaction lists classify dry mouth as a common side effect of the medicine. While dry eyes or blurred vision are not included in the common reaction categories, regulatory warnings indicate that anticholinergic effects, which include blurred vision, have been reported, especially in older adult populations.

Q: Are there any specific foods or drinks that should be avoided with Hydroxyzinum Espefa?

Regulatory documents indicate that the co-administration of alcohol carries a risk of significantly aggravating the sedative effects of the medicine, and concurrent use is advised against. The official product information otherwise indicates that the medicine may be taken with or without food.

Q: What does the research say about Hydroxyzinum Espefa for generalized anxiety disorder (GAD)?

Official regulatory documents indicate that the medicine is indicated for the symptomatic relief of anxiety and tension associated with psychoneurosis. This official indication is broadly described in clinical contexts as relating to conditions such as generalized anxiety disorder (GAD).

Q: What are the descriptive safety classifications for Hydroxyzinum Espefa?

The medicine carries specific contraindications concerning certain patient populations. Official documents state that the drug is strictly contraindicated during early pregnancy and for breastfeeding mothers. It is also contraindicated for individuals who have a known prolonged QT interval, which is a risk factor for a serious abnormal heart rhythm.

Q: Is Hydroxyzinum Espefa chemically the same as the drug cetirizine?

The two compounds are not chemically identical. Official documents indicate that cetirizine is a metabolite of hydroxyzine, meaning it is the compound hydroxyzine is broken down into by the body. This relationship is why official warnings list hypersensitivity to both compounds as a contraindication.

Q: Are there current ongoing clinical trials involving Hydroxyzinum Espefa?

Studies and official information indicate that research is ongoing to explore the use of this medicine in diverse settings. Specific details on ongoing clinical trials are typically not included within standard regulatory product documents, though research efforts are described as continuing.

How should Hydroxyzinum Espefa be stored and disposed of?

How to Store and Dispose of Hydroxyzinum Espefa

The storage and disposal of Hydroxyzinum Espefa (hydroxyzine dihydrochloride) must adhere strictly to official regulatory conditions to ensure product quality and safety.

Storage Requirements

Condition Regulatory Requirement
Temperature Store at Controlled Room Temperature, 20 C to 25 C (68 F to 77 F). Do not freeze.
Protection Keep the container tightly closed and protect the product from moisture. Certain formulations must also be protected from light.
Safety The medicine must be kept out of the sight and reach of children at all times.

Disposal Instructions

Regulatory documents specify that unused or expired Hydroxyzinum Espefa must not be thrown away in household waste or via wastewater (flushing).

The official method for disposal is to return the product to a pharmacy or use an authorized drug take-back or collection point.

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

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