Hizone

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Hizone

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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 Hizone

What is Hizone? Overview

The following information describes the identity and general nature of Hizone, a brand name for the generic drug Hydroxyzine, widely available as an oral tablet in several international markets.

Property Description
Active Ingredient Hydroxyzine
Form Oral tablet or capsule
Pharmacological Class First-Generation Antihistamine; Anxiolytic
Prescription Status Requires a prescription (Rx)
Origin Synthetic chemical compound

What Type of Medicine Is Hizone? (Class, Nature, and Form)

Hizone is a medication classified as a First-Generation Antihistamine belonging to the piperazine chemical class. It is a synthetic compound and a prescription-only product, typically supplied as an oral tablet or capsule. Unlike over-the-counter antihistamines, Hizone’s specific chemical structure results in a significant impact on the central nervous system. Hydroxyzine is clinically recognized as an H1 receptor antagonist, meaning it actively blocks the effects of the natural chemical histamine in the body. This confirms the drug's specialized role, requiring a physician's guidance due to its extended effects beyond basic allergy relief.


What Is Hizone Made Of? (Active Composition)

Hizone’s therapeutic action is centered on its sole active ingredient, Hydroxyzine. This substance is entirely synthetically produced to ensure a high level of pharmaceutical purity and a consistent effect. It is delivered in tablet form alongside inactive ingredients that ensure its stability and optimal release after being swallowed.

Hydroxyzine is one of the few H1 antagonists that also demonstrates activity on serotonin and dopamine receptors. This evidence supports the medicine’s unique, recognized dual capability beyond simple anti-allergy use.


What Is the General Purpose of Hizone? (High-Level Therapeutic Role)

The primary general purpose of Hizone is to provide symptomatic relief from intense itching and allergic reactions, and concurrently, to promote a state of calmness and relaxation. Due to its dual mechanism, it is typically indicated for patients needing both anti-histamine action and a mild anxiolytic effect. The drug is used in general practice to help manage feelings of restlessness or worry, offering a functional support that is distinct from medications used solely for long-term chronic anxiety management.

What side effects are possible with Hizone?

The regulatory documentation for Hizone (Hydroxyzine) lists possible side effects and safety concerns, primarily related to its action on the central nervous and cardiac systems. Adverse events are formally grouped by the system-organ class they affect in official labeling.

Documented Adverse Reactions and Frequencies

The most frequently reported effect involving the Nervous System is drowsiness, which is often classified as transitory—meaning it may diminish after a few days of continuous treatment. Other reported nervous system effects include headache, hallucination, and, rarely, involuntary motor activity or convulsions, typically associated with amounts exceeding recommendations. Due to its properties, dry mouth may be encountered, representing an anticholinergic effect.

Serious Adverse Reactions and Safety Constraints

Official safety information highlights the risk of serious adverse reactions impacting the Cardiac System. Cases of QT prolongation and Torsade de Pointes (TdP), which are serious alterations in the electrical activity of the heart, have been reported in post-marketing surveillance. A serious, systemic skin reaction known as Acute Generalized Exanthematous Pustulosis (AGEP) is also documented.

The medicine is contraindicated in individuals with a known or acquired prolonged QT interval or those with risk factors for QT prolongation, such as pre-existing heart disease or significant electrolyte imbalances. This restriction defines critical limitations for use.

Population-Specific Safety Considerations

Specific regulatory cautions apply to certain groups. Older adults are considered more susceptible to over-sedation and confusion, and they are more likely to experience prolonged drug clearance. Caution is also noted for use in patients with renal or hepatic impairment, as clearance of the drug’s active components may be affected.

Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory guidance specifies that overdose with Hizone (Hydroxyzine) may lead to serious clinical manifestations, requiring immediate and decisive action. The presentation of an overdose is primarily characterized by effects on the central nervous system and potential cardiac complications.

Documented Overdose Manifestations

The most commonly reported sign of overdosage is hypersedation (excessive drowsiness). Severe manifestations documented in regulatory labeling include stupor and convulsions. Less commonly, nausea and vomiting may also be present.

Serious Outcomes and Emergency Action

Overdose has been associated with the risk of QT prolongation and Torsade de Pointes, a life-threatening form of ventricular arrhythmia. Because of these serious outcomes, the following actions are mandated:

  • Seek immediate medical attention.
  • Contact a poison control center or emergency room at once.

Immediate discontinuation of treatment and urgent medical care are required if any signs or symptoms associated with cardiac arrhythmia occur. Continuous ECG monitoring is recommended in overdose situations due to the risk of cardiotoxicity.

Management and Antidote Status

Regulatory documents state that no specific antidote is known for Hydroxyzine overdosage. Management is therefore focused on symptomatic and supportive care, which may include measures such as gastric lavage, administration of activated charcoal, and frequent monitoring of vital signs. Treatment for accompanying hypotension involves intravenous fluids and vasopressors, though regulatory sources explicitly note that epinephrine must not be used.

Therapeutic Uses of Hizone

What Hizone Treats: Main Uses and Benefits

Hizone (Hydroxyzine) is relevant in contexts marked by increased discomfort or tension, applied in clinical settings where supportive symptom management is appropriate. It is considered relevant when short-term symptomatic assistance is needed across two key areas of symptomatic management.


Managing Symptomatic Distress

This medication is used in situations involving symptoms related to inflammatory or irritative states, specifically acute or chronic intense itching (pruritus) and associated skin manifestations like hives (urticaria) and certain dermatitis. It is also applied in scenarios where additional management of discomfort is required due to heightened physiological activity, such as restlessness, worry, and generalized nervousness. The medication plays a role in managing symptom intensity across conditions characterized by recurrent or sudden symptom escalation.

“This medication assists with maintaining functional stability and supports general well-being during symptomatic phases.”

Therapeutic uses generally involve providing relief from pruritus due to allergic conditions, supporting patients with anxiety and tension, and applying assistance in scenarios requiring temporary symptomatic stabilization. The benefit is to offer symptomatic support that may help patients cope more steadily during difficult episodes by promoting a sense of calmness and relaxation.


Quick Fact: Relief for Intense Itching Hizone is considered relevant when symptoms of intense, generalized itching create noticeable physiological strain, helping to ease the overall symptom burden.

Regulatory References

  1. NIH MedlinePlus Drug Information

Eligibility and Restrictions for Use

Hizone, which contains the active ingredient hydroxyzine, is a prescription medication primarily used to manage symptoms of anxiety and to treat various allergic skin conditions such as chronic urticaria, eczema, and pruritus (itching). It is also sometimes used for its sedative effects to provide relaxation before or after surgery.


Contraindications and Precautions

While generally well-tolerated when used as prescribed, Hizone is not suitable for everyone. It is contraindicated and should not be used in the following circumstances:

  • If a patient has a known allergy or hypersensitivity to hydroxyzine, cetirizine, levocetirizine, or any other component of the formulation.
  • During pregnancy (especially the first trimester) and while breastfeeding, unless a physician determines the potential benefits outweigh the risks.
  • In patients with certain heart rhythm disorders (known as prolonged QT interval), or those taking other medications that prolong the QT interval, due to the risk of serious cardiac side effects.

Caution should be exercised and a physician must be informed if the patient has a history of: glaucoma, seizures, kidney or liver impairment, high blood pressure, or other heart conditions. Dose adjustments or alternative treatments may be necessary for these individuals.

What should I know about interactions with other medicines?

Hizone Interactions with other medicines and products

Hizone (Hydroxyzine) interacts with various medicinal products and substances, and regulatory authorities have established strict constraints to manage these patterns, primarily based on pharmacodynamic and pharmacokinetic mechanisms.


Formal Contraindications and Restrictions

Co-administration is strictly contraindicated with products known to prolong the QT interval (such as certain Class IA/III antiarrhythmics and specific antibiotics and antipsychotics) due to the risk of serious cardiac arrhythmias. The simultaneous use of potent CYP3A4/5 inhibitors is also prohibited, as these are expected to increase Hizone's plasma concentrations and associated cardiotoxicity risk. Patients are officially advised to avoid the simultaneous use of alcohol due to additive Central Nervous System (CNS) depressant effects.


Documented Interaction Patterns

Hizone exhibits a potentiating action with all CNS depressants (including narcotics and barbiturates), a pharmacodynamic effect that requires the dosage of the co-administered depressant to be reduced. Furthermore, additive effects may occur with other anticholinergic agents. Hizone is documented as a substrate for the CYP3A4/5 enzyme and an inhibitor of CYP2D6 at high doses, impacting the clearance of various co-administered drugs. For procedures, treatment must be stopped at least 5 days before allergy testing to prevent interference with results.


Population-Specific Notes

Official labeling notes that dose reductions must be considered for the geriatric population and in patients with hepatic or renal impairment due to altered drug elimination, which may increase exposure and interaction sensitivity.

Mechanism of Action

How Hizone Works

Hizone exerts its pharmacodynamic effects through interaction with specific receptor-mediated signaling pathways in both the central nervous system (CNS) and peripheral tissues. The mechanism is defined by two primary domains of action.


Receptor-Mediated Neurotransmitter Modulation

The drug functions in the brain as an inverse agonist at central Histamine H1 receptors (H1). By binding to the receptor and shifting the constitutive equilibrium away from the active state, Hizone modifies early molecular steps in the associated signaling cascade. This action reduces neuronal activity in key subcortical areas. The resulting physiological adjustments include a reduction in general central nervous system (CNS) activity.


Peripheral Effector Blocking

In peripheral tissues, Hizone acts as a competitive antagonist to block peripheral Histamine H1 receptors (H1). These receptors normally mediate the effects of endogenous histamine. This receptor-blocking mechanism reduces the impact of excessive mediator activity, leading to predictable physiological adjustments that include a reduced magnitude of peripheral histamine-mediated effects within signaling pathways.

Dosage and Administration Information

Administration and Dosing of Hizone (Ceftriaxone)

Hizone is a sterile, semisynthetic powder administered by a healthcare professional as an Intravenous (IV) injection/infusion or Intramuscular (IM) injection. The choice of route and frequency is determined by the patient’s condition and the specific infection being addressed.

Administration Detail Official Guideline
Route of Administration IV injection/infusion or IM injection.
Timing/Frequency Individualized; generally once a day or in equally divided doses every 12 hours.
IV Administration Rate Slow IV injection over 2 to 4 minutes or intermittent infusion over at least 30 minutes.
IM Administration Doses exceeding 1 g should be divided and injected into more than one site.

Preparation and Special Conditions

The powder must be reconstituted prior to use with an approved diluent. The resulting solution may vary in color from light yellow to amber. Administration is independent of food or meal timing.

Age-Specific Use: Pediatric dosing is determined by body weight, and the maximum IV dose for neonates should not exceed 50 mg/kg.

Missed Dose: Patients are instructed to contact their healthcare provider immediately if a dose is missed to skip the dose and resume the normal schedule, as directed, and not to double the dose.

Important Safety Note on Diluents: Hizone must not be administered simultaneously with calcium-containing IV solutions, including Ringer's or Hartmann's solutions, via the same line or site due to the risk of precipitation.

Recent Clinical Evidence

Research evidence / Overview of Studies for Hizone

This section provides an overview of the official research record for Hizone (Hydroxyzine) as reported by regulatory and scientific sources. It focuses on the structure of the clinical evaluation, the types of studies conducted, and what remains unclear or uncertain, without offering any clinical advice or guidance.

Evidence from Randomized Controlled Trials (RCTs)

The evidence for Hizone includes findings from various clinical studies, such as randomized controlled trials (RCTs). This type of research is used to evaluate the drug's use by comparing it against a placebo or against other existing medications.

Evidence for Symptomatic Relief of Anxiety and Tension

Hizone was studied for its use in patients experiencing symptoms related to anxiety and general tension. Short-term RCTs were evaluated in adult populations where conditions are characterized by fluctuating or episodic manifestations of anxiety. These studies were used in research exploring how symptoms change over time across defined, short time intervals, often using standardized clinical questionnaires like the Hamilton Anxiety Rating Scale (HAM-A).

The research describes patterns that were measured during the study period, often comparing the outcomes against those reported in placebo groups across the short-term follow-up periods. Systematic reviews acknowledge that the evidence evaluated for this use was observed in some studies that have a moderate to low certainty level. Many of these reviews also indicate a potential high risk of bias in some of the original clinical trials.

Evidence for Management of Intense Itching (Pruritus)

Hizone was studied for its use in managing intense itching (pruritus) associated with conditions linked to inflammatory or irritative states, such as chronic hives (urticaria) and dermatitis. Studies explored outcomes related to physical discomfort, focusing on the reduction of itch severity using specialized patient-reported scales, and monitored outcomes reflecting daily functioning or activity level.

Research describes patterns related to short-term changes in itch severity that were observed in some studies involving both adult and pediatric populations. This evidence base is generally described by regulators as having an established structure across time, although much of the underlying comparative evidence is historical.


Long-Term Studies and Follow-up Duration

Clinical research for Hizone was observed in studies designed for acute and medium-term assessment rather than long-term maintenance. For symptomatic relief, the core clinical trials had follow-up durations that were limited, typically lasting only 4 to 12 weeks. Therefore, long-term effects are not fully established, and there is limited information regarding the durability of any observed response beyond the first few months of use.


What is Still Uncertain About Hizone's Research Record

Scientific review bodies have identified several areas where the evidence remains limited or uncertain. A key uncertainty is the low certainty and potential high risk of bias noted in systematic reviews of the anxiety trials. Furthermore, comparative evidence is lacking for many current standards of care, as many of the key studies are older. The evidence ultimately highlights what has been observed—and what is still uncertain regarding the long-term consistency of findings across varying patient groups.

Key Studies & References

  1. Summary Safety Review - Hydroxyzine (ATARAX and generics) - Assessing the Potential Risk of Abnormal Heart Rhythm - Health Canada

Frequently Asked Questions (FAQ)

Common questions about Hizone (FAQ)

Q: What kind of medical conditions is Hizone usually prescribed for?

A: Hizone (Hydroxyzine) is primarily approved for the symptomatic relief of anxiety and tension related to psychoneurosis. Additionally, official product information indicates it is used for managing pruritus (intense itching) caused by allergic skin conditions like chronic hives. It is also sometimes used for its sedative effects before and after general anesthesia or surgery.


Q: How long does it typically take to start feeling the effects of Hizone?

A: Official information indicates that the oral formulation of Hizone is rapidly absorbed. Effects typically begin within 15 to 30 minutes after taking the medication, with the concentration in the body peaking within approximately two hours.


Q: Is Hizone something you take for a short time or long-term?

A: Clinical studies supporting its use, particularly for anxiety relief, have primarily assessed short-term periods. Systematic clinical studies have not formally assessed its effectiveness or safety as an anti-anxiety agent for periods longer than four months.


Q: What happens if I miss a dose of Hizone?

A: Regulatory guidance suggests that if a dose is missed, a patient's healthcare provider should be consulted for specific instructions on how to proceed. It is explicitly recommended to avoid taking a double dose to compensate for the missed one.


Q: Does Hizone interact with common pain relievers like ibuprofen or acetaminophen?

A: Regulatory warnings focus on avoiding drugs that affect the central nervous system (CNS) or the heart rhythm. The drug label does not specifically name common over-the-counter pain relievers like ibuprofen or acetaminophen, but regulatory documents indicate that all potential drug interactions should be reviewed in a clinical context.


Q: Can I take Hizone if I also take supplements like vitamins or herbal remedies?

A: Hydroxyzine has been documented to have mild interactions with certain herbal substances. It is important for a patient's healthcare team to be aware of all supplements and vitamins being taken, as some may have additive effects, such as increased sedation.


Q: Can children take Hizone, and is the dosage different?

A: Yes, Hydroxyzine is approved for use in children for both anxiety and the treatment of itching. The dosage is highly individualized based on the child's body weight and age, and the exact regimen is determined by the prescriber.


Q: Is Hizone safe for older adults or seniors?

A: While it can be used in older adults, official documents stress that caution is advised. Seniors are more susceptible to certain side effects like confusion, profound sedation, and dry mouth. Official guidance notes that dose adjustments are typically considered for older adults due to their increased susceptibility to side effects and altered drug clearance.


Q: Do I need to get regular blood tests while I'm taking Hizone?

A: Prescribing information instructs the healthcare provider to periodically reassess the continued usefulness of the medication. While specific routine blood tests are not universally required, monitoring may be considered, particularly for individuals with risk factors, such as electrolyte imbalances.


Q: Is Hizone addictive or habit-forming?

A: According to official drug classifications, Hydroxyzine is not a controlled substance. It is generally not considered to have the same potential for abuse or addiction as other classes of anxiety medications.


Q: How long does Hizone stay in your system after you stop taking it?

A: Hydroxyzine has an average half-life of about 20 hours in adults. Because it takes roughly five half-lives for a drug to be almost fully eliminated, the substance may remain detectable in the body for approximately 100 hours, or over four days, after the last dose.


Q: Are there generic versions of Hizone available, and are they the same?

A: Yes, the FDA has approved generic versions of the active ingredient Hydroxyzine (such as Hydroxyzine Pamoate and Hydrochloride). Generic drugs must meet the same strict standards for safety, quality, effectiveness, and manufacturing as the brand-name product.


Q: Why is Hizone sometimes used in combination with other drugs?

A: Official indications show that it is used for its sedative properties, such as when used as premedication before or following anesthesia. Using it in this context may help permit a reduction in the amount of narcotic dosage required.


Q: Is it okay to stop Hizone suddenly, or do I need to taper off?

A: The official drug label does not specify a tapering schedule. Because it acts as a central nervous system depressant, the decision to stop or change the regimen should always be determined by a healthcare professional.


Q: Can Hizone affect mood or cause anxiety?

A: Adverse event reports to regulatory bodies have included nervous system effects such as hallucination. Any unexpected or unusual changes in mood or symptoms should be discussed with the prescribing clinician.


Q: Is there a maximum time someone can safely take Hizone?

A: For anxiety treatment, official documents indicate that the safety and effectiveness of continuous use longer than four months have not been established by systematic clinical studies. The continued need for treatment is subject to a regular reassessment by the prescriber.


Q: Do you take Hizone with food, or is it better on an empty stomach?

A: Patient information from regulatory sources states that oral Hydroxyzine can be taken with or without food.


Q: Is Hizone available over-the-counter in any country?

A: In the United States, Hydroxyzine is a prescription-only medication (Rx) due to its significant effects on the central nervous system and its cardiac safety profile.


Q: Does Hizone make you more sensitive to the sun?

A: While regulatory labeling does not consistently list sun sensitivity as a common side effect for hydroxyzine, some medications in the antihistamine class have been associated with this risk. Prudence regarding sun exposure is generally recommended when taking medications of this class.


Q: Can Hizone interfere with flu shots or other vaccinations?

A: Official labeling specifies that hydroxyzine must be stopped at least five days before allergy skin testing to prevent false results. The label does not provide specific information regarding interference with common vaccinations like flu shots.


Q: Is the research supporting Hizone considered high-quality evidence?

A: Systematic reviews of the drug's trials acknowledge that some of the evidence evaluated for anxiety and itching was observed in studies that have a moderate to low certainty level. Additionally, these reviews note a potential high risk of bias in some of the original clinical trials.


Q: Do different formulations of Hizone (e.g., tablet vs. capsule) exist, and what's the difference?

A: Yes, Hydroxyzine is available in multiple forms, including oral tablets, capsules, and solutions/syrups. These different formulations may contain different salts (Hydroxyzine Hydrochloride or Pamoate). The specific prescribing instructions for the exact product formulation should be adhered to.

How should Hizone be stored and disposed of?

Hizone (Hydroxyzine oral tablets/capsules) must be stored and handled according to regulatory labeling to maintain its stability and ensure safety.


Required Storage Conditions

The medication must be stored at Controlled Room Temperature, which is defined as 20 C to 25 C (68 F to 77 F). The container must be kept tightly closed and protected from light, excess heat, and moisture. It is required to Protect from freezing.

All medication must be stored out of the sight and reach of children and pets; this often requires using a child-resistant closure.


Disposal Instructions

Unused or expired Hizone should be disposed of via a drug take-back program. If a program is unavailable, it must be removed from its original container, mixed with an undesirable substance (such as dirt or used coffee grounds), placed in a sealed bag, and then thrown in the household trash. The original prescription label must have all personal information scratched out before disposal. Do not flush this medicine down the toilet or sink.

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

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