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Atarax Syrup

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Atarax Syrup

Atarax Syrup_EN

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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 Atarax Syrup

Atarax Syrup is a prescription-only oral solution whose active ingredient is Hydroxyzine hydrochloride. This medication belongs to the first-generation H1 antihistamine class, a group of medicines that primarily work by blocking the action of histamine, a natural substance involved in allergic reactions and itching.

Property Description
Active Ingredient (INN) Hydroxyzine hydrochloride
Form Syrup (Oral Solution)
Pharmacological Class First-generation H1 Antihistamine
Primary Uses Symptomatic relief of anxiety, allergic itching (pruritus)
Status Prescription-only (Rx)

Therapeutic Role

The syrup form of Atarax is frequently used because it is easier to administer, particularly to children and patients who have difficulty swallowing solid tablets. The liquid formulation allows for rapid absorption from the digestive tract, with clinical effects typically noted within 15 to 30 minutes after taking the dose.

The primary therapeutic applications are based on its chemical profile. It is clinically recognized for both its ability to manage pruritus (itching) caused by allergic skin conditions like chronic urticaria, and for providing symptomatic relief of anxiety and tension associated with certain conditions. This dual action is due to its antihistaminic properties and its effect of suppressing activity in certain key regions of the subcortical area of the central nervous system.

Unlike many newer antihistamines, Hydroxyzine's structure provides a distinct calming effect, which is why it is also sometimes used as a short-term sedative, such as before and after general anesthesia.

Regulatory References

  1. NIH DrugBank

What side effects are possible with Atarax Syrup?

Possible Side Effects and Safety Information

Hydroxyzine hydrochloride (Atarax Syrup) is associated with adverse reactions that are classified in regulatory documents according to the body system affected and the reported frequency. The safety profile highlights effects predominantly on the Central Nervous System (CNS), Cardiac System, and the Skin and Subcutaneous Tissue.

Category Officially Documented Effects
Common Drowsiness, dry mouth, headache.
CNS Effects Dizziness, involuntary motor activity, tremor, convulsions.
Anticholinergic Effects Urinary retention, blurred vision.
Dermatological Pruritus, rash, urticaria, Acute Generalized Exanthematous Pustulosis (AGEP).

The official labeling notes that drowsiness is generally a transitory effect, often observed at the initiation of treatment, which may subside with continued use. However, the regulatory safety framework is defined by the risk of serious adverse reactions, particularly on the heart. These include QT interval prolongation and the risk of Torsade de Pointes (TdP), which are potentially life-threatening ventricular arrhythmias. Due to these risks, the medicine is contraindicated in individuals with a known history of QT prolongation or other significant cardiac risk factors.

Specific safety considerations apply to certain populations. Use in older adults is generally not recommended by regulatory agencies, and if used, the dose must be restricted due to increased vulnerability to adverse effects. Caution is also advised for patients with renal or hepatic impairment, as the clearance of the medicine may be prolonged.

Overdose and Emergency Response

Overdose: What to Know and When to Seek Help

If an overdose of Atarax Syrup (hydroxyzine) is suspected, immediate medical attention is required due to the risk of serious complications affecting the central nervous system (CNS) and the heart.

Documented Overdose Symptoms

The primary symptoms observed in hydroxyzine overdose are related to CNS depression, including hypersedation, stupor, and convulsions. Gastrointestinal effects such as nausea and vomiting have also been reported. Crucially, overdose carries a risk of serious cardiac events, including QT prolongation and a potentially fatal abnormal heart rhythm known as Torsade de Pointes.

Emergency Measures

Immediate actions in a supervised setting often involve supportive care and attempting to reduce drug absorption. This may include inducing vomiting if it has not occurred spontaneously, followed by gastric lavage. Close monitoring of vital signs and patient observation is indicated.

Because of the potential for severe cardiac complications, ECG monitoring is recommended in cases of hydroxyzine overdose. If hypotension develops, it is managed with intravenous fluids and vasopressors, though epinephrine should not be used as it is counteracted by hydroxyzine. Special consideration is given to the elderly and pediatric populations due to their increased susceptibility to adverse effects.

Therapeutic Uses of Atarax Syrup

Quick Facts: Uses of Atarax Syrup

  • Relief of Symptoms: Helps manage manifestations of anxiety and tension.
  • Allergic Conditions: Used to help reduce pruritus (itching) associated with chronic urticaria, atopic dermatoses, and contact dermatoses.
  • Sedation: Employed as an adjunctive treatment to promote sedation before and after general anesthesia.

What Atarax Syrup Treats: Main Uses and Benefits

Atarax Syrup (hydroxyzine hydrochloride) is an approved prescription medication used for therapeutic management across several key areas. Its primary applications involve providing symptomatic relief for specific conditions as determined by a healthcare provider.

One of the main uses is to help manage manifestations of anxiety and tension associated with psychoneurosis. It is also utilized as an adjunct in organic disease states where anxiety is present. This medication is not intended for long-term management of anxiety beyond four months.

Additionally, Atarax Syrup is useful in the management of pruritus (itching). This includes helping to reduce discomfort due to allergic conditions such as chronic urticaria (hives), contact dermatoses, and atopic dermatoses, as well as histamine-mediated pruritus.

Finally, this formulation is employed as a sedative when used for premedication before general anesthesia and to promote relaxation following the procedure, offering an adjunctive role in these medical settings.

Eligibility and Restrictions for Use

Who Can and Cannot Use Atarax Syrup? (Official Regulatory Information)

The eligibility for Atarax Syrup (hydroxyzine hydrochloride) is strictly defined by regulatory authorities based on age, physiological status, and pre-existing medical conditions.

Contraindicated Populations (Must Not Use)

Category Regulatory Statement
Hypersensitivity Contraindicated in patients with known hypersensitivity to hydroxyzine, its metabolites (cetirizine, levocetirizine), or related piperazine derivatives.
Cardiac Conditions Contraindicated in patients with a known acquired or congenital QT interval prolongation or certain risk factors (e.g., significant electrolyte imbalance or family history of sudden cardiac death).
Concomitant Drug Use Contraindicated when concurrently receiving a drug known to prolong the QT interval and/or induce Torsade de Pointes.

Age and Physiological Restrictions

Category Regulatory Statement
Age Groups Approved for adults and children (under and over 6 years of age) for labeled indications.
Older Adults Use is not recommended in elderly patients due to decreased elimination and increased risk of adverse reactions.
Pregnancy Contraindicated in early pregnancy. Use in the latter part of the third trimester may cause adverse effects in neonates.
Lactation Should not be given to nursing mothers due to unknown excretion in human milk.

Condition-Specific Limitations

Use requires dosage reduction in patients with hepatic dysfunction or moderate to severe renal impairment. Caution is required in patients with seizure disorders or conditions susceptible to anticholinergic effects, such as glaucoma or urinary retention.

What should I know about interactions with other medicines?

The regulatory profile for Hydroxyzine hydrochloride (Atarax Syrup) is structured around documented pharmacokinetic (PK) and pharmacodynamic (PD) interaction risks.

A formal contraindication exists for co-administration with drugs known to prolong the QT interval, due to a documented additive risk of cardiac arrhythmia. Co-use is also prohibited with strong or moderate CYP3A4/5 Inhibitors, as this pharmacokinetic interaction reduces the clearance of hydroxyzine, significantly increasing its plasma concentration and the potential for associated cardiac risk.

A clinically significant pharmacodynamic interaction is noted with all Central Nervous System (CNS) Depressants, including narcotics, non-narcotic analgesics, and other sedatives. Concomitant use with these agents results in the potentiation of central effects, such as increased sedation and somnolence. This potentiation is also officially documented for co-ingestion with alcohol.

Specific food products like grapefruit or grapefruit juice are officially stated to increase hydroxyzine exposure through CYP3A4 inhibition. Population-specific considerations are documented, noting that interactions leading to CNS effects are more pronounced in elderly patients, and reduced elimination in those with hepatic impairment or severe renal impairment may increase overall exposure to the drug and its active metabolite, cetirizine.

Mechanism of Action

The pharmacological action of Hydroxyzine hydrochloride is executed through simultaneous engagement with multiple receptor systems, operating through multi-receptor engagement in both peripheral tissues and the central nervous system (CNS).

Modulation of Peripheral Histamine Signaling

The primary mechanism involves acting as an inverse agonist at the Histamine H1 receptor found on peripheral cells. This interaction actively suppresses the receptor’s basal activity and blocks the binding of the natural mediator histamine. This action modifies molecular steps that govern histaminergic inflammation, resulting in decreased capillary permeability and modulation of sensory afferent signaling.

Multi-Target Suppression of Central Neural Activity

Due to the molecule's high lipophilicity, it rapidly accesses the brain and engages key central targets, including central H1 receptors and Serotonin 5-HT2A receptors, particularly within the subcortical area (e.g., reticular formation). This combined multi-receptor blockade suppresses neuronal excitability, which results in a reduction of arousal signals and facilitates a state of decreased physiological activity within targeted neural pathways. The drug also exhibits ancillary antagonism at Muscarinic Acetylcholine and alpha1-Adrenergic receptors, which constitutes its broader multi-target mechanistic footprint.

Dosage and Administration Information

Administration Principles

Atarax Syrup, which is an oral solution of hydroxyzine hydrochloride, is administered strictly by the oral route. For accurate dosing of the liquid, a calibrated measuring device—such as a specific spoon, syringe, or cup—must be used to measure the volume corresponding to the prescribed milligram dose. The medication may be taken with or without food, as its administration is not dependent on meal timing.

Official Dosing Regimens

Hydroxyzine is intended for use at the lowest effective dose and for the shortest possible duration. Dosing regimens vary based on the clinical scenario, but generally involve divided doses throughout the day.

Indication Standard Adult Labeled Dose Frequency Pattern
Symptomatic Anxiety 50 mg to 100 mg total daily dose Given in divided doses
Pruritus (Itching) 25 mg three or four times daily Given in divided doses
Sedation (Premedication) 50 mg to 100 mg per dose Single, pre-procedure dose

For adults and adolescents weighing over 40 kg, the maximum total daily dose is restricted to 100 mg per day.

Population-Specific Use

Specific limitations on total daily consumption are established for certain populations. The maximum daily dose for older adults is typically restricted to 50 mg per day, and therapy is initiated at the low end of the adult dosing range. For pediatric patients, dosing is often calculated based on weight, with the maximum total daily dose capped at 2 mg per kilogram of body weight for children up to 40 kg. Long-term use of the medication for anxiety has not been systematically evaluated beyond four months.

Recent Clinical Evidence

Research evidence / Overview of studies for Atarax Syrup

Evidence for Symptomatic Relief of Anxiety and Tension

The use of hydroxyzine for anxiety symptoms was evaluated in research exploring how symptoms change over time. The core evidence consists of short-term, randomized controlled trials (RCTs). These studies examined how the medicine compared against a placebo or other active treatments in populations of adults presenting with conditions characterized by fluctuating or episodic manifestations of anxiety. Researchers examined changes in outcomes reflecting daily functioning and overall status using standardized anxiety severity scales.

The findings describe patterns observed in the study populations over defined time intervals. However, a significant limitation is that the follow-up durations were limited, typically lasting only a few weeks. Consequently, data on long-term effects are not fully established. Scientific reviews of the evidence specifically note the limited information for long-term outcomes, indicating that systematic clinical studies have not been conducted to describe the results of continuous use beyond a four-month period. Furthermore, evidence quality varies across studies from earlier decades, meaning the overall certainty remains low for certain measured changes when viewing the totality of the research.

Evidence for Managing Allergic Itching (Pruritus)

Hydroxyzine was studied for conditions associated with acute or disruptive episodes of itching, such as those caused by chronic urticaria (hives) and other allergic skin reactions. The evidence base includes both randomized controlled trials and clinical pharmacology studies where the medicine was evaluated in populations of adults and children. These studies monitored outcomes related to physical discomfort, such as the intensity or variability of the patient's itch. The research also included clinical pharmacology studies that examined the compound's association with histamine-induced skin reactions.

Studies reported patterns related to symptom intensity over short-to-intermediate timeframes. However, comparative evidence involving certain newer non-sedating antihistamines remains limited. Additionally, research primarily focuses on symptom relief and provides limited insight into long-term changes or the effect on the underlying condition.

What Remains Uncertain About the Research for Atarax Syrup

Evidence highlights what is known — and what is still uncertain — about the research surrounding this medication. In the anxiety research, the certainty remains low for several findings because the evidence quality varies across studies and some older trials have been noted for certain study design limitations. Key areas where long-term effects are not fully established include sustained anxiety relief and the durability of the anti-itching effect over periods exceeding four months. Comparative evidence is lacking when placing hydroxyzine against all modern non-sedating alternatives, and subgroup findings are uncertain for many specialized patient groups. Studies help show what has been observed so far, but research is ongoing to provide more comprehensive data.

Key Studies & References

  1. Hydroxyzine for the Management of Pruritus (Systematic Review/Clinical Data Overview)

Frequently Asked Questions (FAQ)

Common questions about Atarax Syrup (FAQ)

Q: What pre-existing medical conditions, besides heart problems, might affect a person’s eligibility to use Atarax Syrup?

Official documents describe several conditions that require caution or dosage adjustment when using Atarax Syrup. These include hypersensitivity to the drug’s components or metabolites (like cetirizine), and conditions such as severe liver or kidney problems, seizure disorders, glaucoma, or urinary retention. Regulatory warnings indicate that use in these situations may require careful medical supervision.

Q: What is the general duration of action for a single dose of Atarax Syrup?

Official information states that the clinical effect of Atarax Syrup is usually noticed within 15 to 30 minutes after taking a dose. However, official documentation does not specify the complete duration of action, acknowledging individual patient variability in how long the effects may last.

Q: Are there research studies on the effectiveness of Atarax Syrup for long-term use (more than four months)?

Systematic clinical studies have not been conducted to assess the effectiveness of this medicine as an anti-anxiety agent for long-term use, defined as more than four months. Consequently, official documentation indicates that results regarding continuous use beyond this limited timeframe are not fully established.

Q: How quickly does Atarax Syrup typically start to have an effect after taking a dose?

The official product information indicates that the clinical effects of Atarax Syrup are typically noted within 15 to 30 minutes following oral administration.

Q: Is it possible for the syrup formulation to cause stomach upset?

The regulatory safety framework notes that diarrhea is reported as a possible adverse effect. Diarrhea is classified as a reported gastrointestinal reaction in the product information.

Q: What types of other medications, particularly central nervous system depressants, should be discussed with a doctor before taking Atarax Syrup?

Official documents stress the importance of discussing all Central Nervous System (CNS) depressants with a healthcare provider, including opioids, non-narcotic analgesics, and other sedating medicines, as taking them together can potentiate (increase) effects like drowsiness. Additionally, any drug known to prolong the heart's QT interval or inhibit certain liver enzymes should also be discussed.

Q: Is it true that Atarax Syrup can sometimes cause excitability rather than drowsiness in young children?

Official adverse reaction reports include Central Nervous System (CNS) effects such as involuntary motor activity and tremor in some instances. Official information notes that pediatric patients may also be susceptible to certain side effects, including confusion and somnolence.

Q: Are there any reported serious skin reactions associated with Atarax Syrup, like a severe rash?

Yes, official regulatory labels mention the risk of Acute Generalized Exanthematous Pustulosis (AGEP). This is described as a rare, severe skin reaction.

Q: Is it necessary to use a special measuring device to take the correct volume of Atarax Syrup?

Official patient counseling information indicates that for accurate dosage, the prescribed volume should be measured using an accurate, calibrated device (such as a specific dosing syringe or cup). This ensures the exact prescribed dosage is administered.

Q: Is Atarax Syrup commonly prescribed for children?

The medication is approved by regulatory bodies for use in both adults and children (under and over 6 years of age) for its labeled indications. The syrup formulation is suitable for pediatric patients as it is easier to administer and allows for precise, weight-based dosing.

Q: Does the drug in Atarax Syrup interact with serotonin levels in the brain?

Official pharmacological descriptions state that the drug's mechanism of action involves interacting with (antagonizing) the Serotonin 5-HT2A receptors in the central nervous system. This receptor engagement is a component of its effects, but regulatory data does not specifically detail how the drug impacts overall serotonin levels.

Q: What is the role of Atarax Syrup in treating different types of chronic skin itching?

The official indications state that the syrup is used for managing pruritus (itching) due to various allergic conditions. This includes chronic urticaria (hives), as well as atopic and contact dermatoses, and histamine-mediated pruritus.

Q: Can Atarax Syrup cause a feeling of drowsiness or sedation?

Yes, drowsiness is described in official documents as a common side effect of this medication. However, the regulatory information indicates that this effect is usually transitory (temporary) and may lessen with continued therapy or a dose reduction.

Q: Is Atarax Syrup the same type of medication as Benadryl (Diphenhydramine)?

Official drug classifications place both Atarax (hydroxyzine) and Benadryl (diphenhydramine) in the first-generation H1 antihistamine class. Because they share a similar drug class, the product label specifically cautions against their concomitant use due to the potential for compounded central nervous system depression, leading to excessive drowsiness.

Q: How is Atarax Syrup (Hydroxyzine HCl) chemically different from Hydroxyzine Pamoate (Vistaril)?

Hydroxyzine is available as two distinct salt forms: hydrochloride ( HCl) in Atarax Syrup, and Pamoate (in Vistaril). Official drug labels confirm that Hydroxyzine hydrochloride and Hydroxyzine Pamoate are chemically distinct salts, even though they contain the same active drug component.

Q: What is the relationship between the drug in Atarax Syrup and the common allergy medicine Cetirizine?

The main and active metabolite produced by the body from hydroxyzine is the second-generation antihistamine cetirizine. Furthermore, official regulatory documents state that a known hypersensitivity to cetirizine or levocetirizine is a contraindication for taking Atarax Syrup.

Q: Why is Atarax Syrup sometimes mentioned in discussions about anti-anxiety drugs like Alprazolam (Xanax)?

Hydroxyzine is chemically unrelated to benzodiazepines like Alprazolam, but both are categorized as Central Nervous System (CNS) depressants. This means taking them together may potentiate (increase) central effects, such as sedation, which is a key interaction warning noted in the official documentation.

Q: Can Atarax Syrup cause changes in mood or confusion?

Adverse effects reported in official documents include psychiatric symptoms such as hallucinations, confusion, and agitation. These are generally classified as Central Nervous System (CNS) effects.

Q: Is it safe to mix Atarax Syrup with a small amount of juice or water to help with taste?

Official regulatory information only prohibits co-administration with grapefruit or grapefruit juice due to a drug interaction concern. Specific instructions on mixing with water or other juices are not provided in the label.

Q: Does Atarax Syrup contain any sugar or common allergens that users should be aware of?

The official list of inactive ingredients for the syrup confirms the presence of sucrose (a sugar) and a small amount of alcohol (0.5% v/v). The list of inactive ingredients includes preservatives like sodium benzoate.

Q: What are the known potential effects of stopping Atarax Syrup too quickly?

While the official label does not itemize specific discontinuation symptoms, regulatory guidelines caution against abrupt cessation. It is recommended that patients discuss a gradual transition plan before stopping the medicine.

Q: Are there different strengths of Atarax Syrup available for different age groups?

The syrup/oral solution is available in one standard concentration, typically 10 mg of hydroxyzine hydrochloride per 5 mL. The actual dose volume administered is adjusted based on the patient's age and weight, according to the prescribed regimen.

Q: What is the risk profile for accidental overdose of Atarax Syrup in children?

According to the official overdosage section, the most common manifestation reported in cases of overdose for any patient, including children, is hypersedation (extreme drowsiness).

Q: Is Atarax Syrup classified as a controlled substance?

No, hydroxyzine is not classified as a controlled substance under the U.S. Drug Enforcement Administration (DEA) scheduling. This status is confirmed by the U.S. Drug Enforcement Administration (DEA) scheduling.

How should Atarax Syrup be stored and disposed of?

How to Store and Dispose of Atarax Syrup?

The official storage and disposal guidelines for Atarax Syrup (hydroxyzine hydrochloride oral solution) are designed to maintain its quality and ensure safety.

Storage Requirements

  • Temperature: Store the syrup at controlled room temperature, defined as 20 to 25 C (68 to 77 F). The product must be protected from freezing and excess heat.
  • Protection: Keep the container tightly closed and protect the medicine from light and moisture.
  • Stability: If the bottle is opened, the remaining solution must be discarded after 90 days.
  • Child Safety: It is mandatory to store the medication securely out of the sight and reach of children.

Disposal Instructions

Expired or unused Atarax Syrup must be disposed of in accordance with local, regional, and national regulations. Do not discard the medicine by emptying it into household drains or wastewater systems. Unused product should be returned to a pharmacy or designated take-back program for proper disposal.

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

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