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Hidroxicina Genfar

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Hidroxicina Genfar

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Medically reviewed

Laura Arias

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.

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Overview of Hidroxicina Genfar

Quick Facts

Property Description
Active ingredient Hydroxyzine
Forms Tablet, Capsule, Oral Solution, Injectable Solution
Pharmacological class First-generation Histamine H₁-receptor antagonist
Common general purpose Relief of allergic itching and promotion of sedation
Origin Synthetic (Piperazine derivative)

What Type of Medicine is Hidroxicina Genfar?

Hidroxicina Genfar is the trade name for the pharmaceutical substance Hydroxyzine, which is classified primarily as a first-generation Histamine H₁-receptor antagonist. This medicine is a synthetic compound derived from the piperazine chemical class. Its identification as a first-generation antagonist is notable because it readily affects both peripheral body systems and the central nervous system (CNS), setting it apart from newer antihistamines. The drug's dual action allows for its utility in managing states of tension and restlessness.


Active Ingredient, Composition, and Available Forms

The core active ingredient in this medication is Hydroxyzine, typically available as either the hydrochloride salt or the pamoate salt. Hidroxicina Genfar is prepared for systemic administration and is manufactured in several physical formats, including oral dosage presentations such as tablets, capsules, and a syrup or oral solution. The oral solution and syrup offer a suitable alternative for individuals who may have difficulty swallowing solid pills. It is also available as a dedicated injectable solution intended for deep intramuscular (IM) use.


General Purpose and Primary Effects

The general purpose of Hydroxyzine stems from its established dual capacity to block histamine and exert CNS suppression. The drug is primarily used for its antihistamine and sedative properties, indicating its two main therapeutic applications. This medicine is used to manage allergic symptoms and provide a calming effect. By blocking histamine, the drug effectively relieves intense, generalized allergic itching (pruritus) associated with various dermatological conditions. Furthermore, its effect on the central nervous system imparts a distinct calming or sedative property, making it useful for reducing feelings of general tension and anxiety by promoting a relaxed state, which represents a common use scenario.

Regulatory References

  1. NIH: Hydroxyzine
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What side effects are possible with Hidroxicina Genfar?

Possible Side Effects and Safety Information

This section describes the adverse reactions and safety characteristics of Hydroxyzine, the active component in Hidroxicina Genfar, as documented in official government regulatory documents.

Documented Adverse Reactions

The most frequently classified adverse effects are primarily related to the central nervous system (CNS) and anticholinergic activity. Sedation is officially categorized as a Very Common effect. Other Common reactions include somnolence, headache, fatigue, and dry mouth. Less common reactions may involve agitation, confusion, or dizziness.

Classification Examples of Reactions
Common Somnolence, Headache, Dry Mouth, Fatigue
Uncommon Agitation, Confusion, Nausea, Dizziness
Rare Tachycardia, Seizures, Hallucinations, QT Interval Prolongation

System-Organ Classification and Serious Concerns

Side effects are classified by the physiological system affected. Reactions are documented across Nervous System Disorders (e.g., sedation, tremor, seizures) and Gastrointestinal Disorders (e.g., constipation, vomiting). Official labeling also highlights Cardiac Disorders, specifically the risk of QT interval prolongation, which is a rare but documented serious adverse reaction that may lead to arrhythmias.

Population-Specific Safety Notes

The official safety profile notes increased susceptibility to CNS and anticholinergic adverse reactions in older adults. Furthermore, the drug is generally contraindicated in patients with severe renal or hepatic impairment due to the risk of increased systemic exposure. The official labeling also restricts its use during pregnancy and lactation. Regulatory documents state that sedation is often most prominent at the start of treatment and may lessen with continued use.

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Overdose and Emergency Response

Taking more Hidroxicina Genfar than prescribed, whether accidentally or intentionally, can lead to an overdose. Overdose symptoms are often related to the central nervous system and the drug's anticholinergic effects.

Potential Overdose Symptoms

Symptoms of a significant overdose may include a spectrum of effects, from pronounced severe drowsiness and confusion, to more serious concerns like seizures or even coma.

Other potential signs involve:

  • Cardiovascular Issues: Rapid, pounding, or irregular heartbeat (palpitations), or low blood pressure.
  • Anticholinergic Effects: Severe dry mouth, blurred vision, difficulty or inability to urinate, and sometimes fever or hallucinations.
  • Gastrointestinal Distress: Nausea and vomiting.
  • Neurological Signs: Tremors, agitation, or uncoordinated movements.

When to Seek Immediate Help

An overdose of Hidroxicina Genfar requires immediate medical attention.

If you suspect an overdose has occurred, or if the individual exhibits severe symptoms such as loss of consciousness, a seizure, difficulty breathing, or a very fast or irregular heartbeat, call your local emergency services immediately. Provide healthcare professionals with the person's age, weight, the name of the medicine, the amount taken, and the time it was ingested. Treatment is primarily supportive, focusing on managing symptoms and monitoring vital functions, particularly heart rhythm.

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Therapeutic Uses of Hidroxicina Genfar

What Hidroxicina Genfar Treats: Main Uses and Benefits

Hydroxyzine, the active component in Hidroxicina Genfar, is used for managing symptom clusters that may become intense or disruptive. It is commonly used when short-term symptomatic assistance is needed.

This medication is relevant in conditions characterized by periods of heightened symptoms, specifically serving as a treatment that is relevant for easing symptoms related to physical discomfort, commonly used to help with symptomatic relief of anxiety and tension, and for the management of pruritus (itching) caused by various allergic conditions involving inflammatory or irritative processes, such as chronic urticaria. These applications constitute the primary therapeutic domains of the medication.

In clinical settings that involve acute or unstable symptom patterns, this medicine may be part of symptomatic management by acting as a sedative, often used during phases when symptoms become more noticeable, such as premedication before or following general anesthesia. It assists with managing symptoms of increased neurological or muscular activity and supports general well-being during symptomatic phases.


Quick Fact: Relevant for Easing Pruritus and Anxiety


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Eligibility and Restrictions for Use

Eligibility Map: Who Can and Cannot Use Hidroxicina Genfar

Official regulatory guidelines define who can and cannot use Hidroxicina Genfar (Hydroxyzine) primarily through contraindications related to cardiac risk and hypersensitivity.

Populations For Whom Use Is Contraindicated:

Contraindication Basis
Prolonged QT Interval Strictly contraindicated due to the risk of serious ventricular arrhythmia [Source 1.2, 2.7].
Hypersensitivity Patients with known allergy to hydroxyzine, cetirizine, or levocetirizine must not use the medicine [Source 1.1].
Early Pregnancy Use is strictly contraindicated during the first trimester of pregnancy due to inadequate human safety data [Source 1.1].

Populations Requiring Restricted or Conditional Use:

Restriction Required Action
Older Adults (Geriatric) Use is not recommended by the EMA; if used, the maximum dose must be severely restricted due to heightened vulnerability [Source 1.2].
Impaired Organ Function Caution is required in patients with renal or hepatic impairment due to decreased drug clearance, often necessitating a dose reduction [Source 3.3].
Nursing Mothers The drug should not be given to nursing mothers due to the unknown risk of drug excretion into human milk [Source 1.1].

Age-Related Eligibility:

Use is approved in adults and children (including children under 6 years of age) for its labeled indications, but pediatric doses are determined by body weight [Source 1.1, 3.6].

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What should I know about interactions with other medicines?

Interactions with other medicines and products


Contraindicated Drug Combinations

The official regulatory labeling identifies specific combinations that are strictly contraindicated. This includes all other medicinal products that are known to prolong the QT interval on an electrocardiogram, such as certain antiarrhythmics, antibiotics, and antidepressants. The combination with potent inhibitors of the CYP3A4/5 enzyme is also prohibited, as these substances significantly increase Hydroxyzine's plasma concentration. Use is likewise restricted in patients with a history of prolonged QT interval.

Drug-Drug and Pharmacokinetic Interactions

Hydroxyzine's effects are formally documented as additive when co-administered with other Central Nervous System (CNS) depressants, including narcotics, sedatives, hypnotics, and alcohol. This interaction requires the potentiating effect to be considered. The drug is classified as a substrate for CYP3A4/5 and an inhibitor of CYP2D6, providing the basis for regulatory cautions regarding potential changes in exposure for co-administered drugs. Grapefruit or grapefruit juice intake is also documented to increase Hydroxyzine exposure.

Timing and Population-Specific Cautions

Due to potential interference with diagnostic results, Hydroxyzine must be discontinued for a mandatory one-week period prior to allergy skin testing. Treatment should also cease for 96 hours before a Methacholine challenge test. For elderly patients and individuals with hepatic or renal impairment, elimination is reduced, increasing the risk of accumulation.

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Mechanism of Action

Hidroxicina, a piperazine derivative, acts primarily as an inverse agonist at histamine H1 receptors (H1). By binding to and stabilizing the inactive conformation of the H1 receptor, it suppresses the constitutive activity of the receptor and prevents the binding of the endogenous agonist, histamine. This Galpha q-coupled receptor blockade inhibits the downstream molecular signaling pathway involving phospholipase C (PLC) activation and the resultant increase in intracellular calcium ion ( Ca^2+) concentration.

The reduction in Ca^2+ mobilization within target cells, such as mast cells and basophils, stabilizes the cellular structure and attenuates the degranulation process, thereby limiting the release of further pro-inflammatory mediators. Additionally, Hidroxicina readily crosses the blood-brain barrier (BBB) and exerts actions in the central nervous system (CNS). Within the CNS, it functions as an antagonist at 5-HT2A serotonin receptors and D2 dopamine receptors, and to a lesser extent, alpha1-adrenergic receptors. These off-target interactions in subcortical areas contribute to its overall systemic physiological modulation, particularly affecting alertness and motor pathways.

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Dosage and Administration Information

How to Use Hidroxicina Genfar

Hydroxyzine, the active component of Hidroxicina Genfar, is administered through specific routes and schedules according to the requirements of different use scenarios.


Official Routes and Forms of Administration

The primary route is Oral, using tablets, capsules, or oral solution. The medication is also used via Intramuscular (IM) Injection for acute situations, such as pre-operative sedation or for managing acutely disturbed patients. The injectable solution is intended for deep intramuscular administration only and is prohibited from being administered intravenously or subcutaneously.


Dosing and Frequency Patterns

Dosing depends on the intended use. For ongoing symptomatic management of conditions like pruritus (allergic itching) or anxiety, the medicine is typically administered in divided doses three to four times daily. The maximum oral daily dose for adults is 400 mg for anxiety, while for pruritus in adults over 40 kg, the maximum dose is often limited to 100 mg/day. Oral forms may be taken with or without food.


Population-Specific Adjustments

Dose reductions are utilized for specific populations due to altered clearance rates. The total daily dose should be reduced by 50% for patients with moderate to severe renal impairment and by 33% for those with hepatic impairment. Dosing for older adults is generally initiated at the lower end of the range, with a common maximum daily dose limit of 50 mg.


Duration Constraint

The effectiveness of oral use for anxiety for periods longer than 4 months has not been established through long-term clinical observation, which necessitates periodic reassessment of the drug's continued usefulness.

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Recent Clinical Evidence

Research Evidence / Overview of Studies for Hidroxicina Genfar

Evidence for Use in Managing Allergic Itching (Pruritus)

The research for this use was evaluated in research exploring outcomes related to conditions involving periods of heightened symptoms, such as chronic hives (urticaria) and other skin inflammations. Short-term Randomized Controlled Trials (RCTs) form the foundation of the evidence base, which often compare the agent against a non-medicated dummy pill or an alternative agent being studied. These studies observed outcomes related to physical discomfort, specifically tracking patient-reported outcomes describing perceived discomfort and overall daily functioning or activity level.

Studies reported changes measured during the study period by tracking the measured change in itching scores in the observed populations. These findings describe patterns observed in the studies over the short-term. What remains uncertain is the effect of using this medicine over longer periods; long-term effects are not fully established.

Evidence for Use in Managing Symptoms of Anxiety and Tension

Studies explored the use of this agent in managing conditions characterized by fluctuating or episodic manifestations of tension and anxiety. The research primarily consists of short-term, placebo-controlled clinical trials involving adult outpatients. These studies assessing measured changes in symptoms of heightened activity and physiological strain or stress that relate to anxiety and tension. Findings indicate that when evaluated in these research contexts, measurements of change in anxiety scale scores were reported during the study period.

A key research limitation is that systematic clinical studies assessing long-term outcomes are not fully established. There is limited information for long-term outcomes regarding this use, as most core studies was observed in populations for a duration of only up to 12 weeks. Additionally, evidence quality varies across studies, with some older trials carrying a higher risk of bias.

Evidence for Use as a Sedative or Premedication

This agent was evaluated in specific research scenarios where patients needed a calming effect prior to a medical or surgical procedure. The studies are typically acute, single-dose controlled clinical trials where the research examined outcomes capturing phases of heightened symptom activity immediately before a procedure. Researchers tracked levels of pre-operative anxiety using specific measurement scales.

Key Areas of Research Uncertainty

This section contributes to the broader evidence landscape by summarizing the established knowledge gaps. A major limitation is the lack of research exploring long-term effects, meaning long-term outcomes are not fully established for chronic use. The evidence quality varies across studies, and in many procedural contexts, the medicine is studied alongside other agents, meaning its individual impact is uncertain.

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Frequently Asked Questions (FAQ)

Common questions about Hidroxicina Genfar (FAQ)


Q: Is Hidroxicina Genfar officially used to help with sleep?

Official regulatory documents and prescribing information state that the drug is approved in some regions for the treatment of sleep disorders. Additionally, it is formally indicated as a sedative for use as premedication before certain medical or surgical procedures. This sedative property contributes to its use for calming effects.


Q: Does Hidroxicina Genfar commonly cause blurred vision or dry mouth?

Official product information lists dry mouth as a Common side effect. Other reactions related to the drug’s anticholinergic activity, such as blurred vision or difficulty emptying the bladder, have also been reported, though they are less frequent.


Q: Is it possible to develop a dependency on Hidroxicina Genfar over time?

Hydroxyzine, the active component, is not classified as a controlled substance by regulatory bodies. This regulatory classification indicates that the drug is described as having a low risk of abuse, addiction, or dependence.


Q: How long does it usually take for Hidroxicina Genfar's effects to begin?

According to official clinical pharmacology data, the drug is rapidly absorbed from the digestive system. The clinical effects of the medication are generally noted within 15 to 30 minutes after taking the medicine by mouth.


Q: What is the typical duration of action for a single dose of Hidroxicina Genfar?

As a first-generation antihistamine, the pharmacological action of hydroxyzine is generally documented in authoritative sources to last for approximately 4 to 6 hours after administration. This means its primary effects, such as sedation and histamine blockade, occur during that window.


Q: Are there common over-the-counter pain relievers that interact with Hidroxicina Genfar?

Official warnings state that the effects of hydroxyzine are additive when combined with other Central Nervous System (CNS) depressants. Regulatory information typically specifies that any interaction concern warrants discussion with a healthcare provider, especially for over-the-counter medicines that can cause drowsiness.


Q: Does Hidroxicina Genfar interact with commonly used herbal supplements?

Regulatory information notes that herbal products and supplements may have potential interactions, and this topic is typically addressed by a healthcare provider. This information is noted alongside warnings about certain foods, such as grapefruit or grapefruit juice.


Q: Are there specific official cautions for children who use Hidroxicina Genfar?

Official regulatory warnings describe the necessity of caution regarding activities that require alertness and co-administration with alcohol. The drug's use is subject to monitoring if the child has a history of prolonged QT on an ECG.


Q: How is the action of Hidroxicina Genfar different from its metabolite, cetirizine?

Hydroxyzine is a first-generation antihistamine known to readily cross the blood-brain barrier (BBB), which causes its common sedative effect. In contrast, its active metabolite, cetirizine, is documented to penetrate the BBB poorly, resulting in significantly less or no sedative effect.


Q: Is Hidroxicina Genfar classified as a controlled substance by regulatory agencies?

No, hydroxyzine is not classified as a controlled substance by the U.S. Drug Enforcement Administration (DEA) or equivalent international regulatory bodies. This classification is reserved for drugs with a high potential for abuse.


Q: What is the meaning of the term 'anticholinergic effects' related to this drug?

Anticholinergic effects are related to the drug's mechanism of action in the body. They result from the medication affecting certain nerve signaling pathways, which can lead to symptoms such as dry mouth (a common side effect), constipation, and blurred vision.


Q: Do official safety documents advise against driving or operating machinery after taking this medicine?

Official labeling contains a cautionary statement noting that driving a car or operating dangerous machinery should be avoided until a person is familiar with the drug’s effects, due to the documented risk of drowsiness and impaired coordination.


Q: What is the general informational guidance provided in regulatory documents regarding a missed dose of Hidroxicina Genfar?

Regulatory patient information describes the guidance for a missed dose. It typically states that if a dose is forgotten, it may be taken when remembered, but if it is almost time for the next dose, the scheduled dose alone is the described path. It is explicitly noted that double or extra doses are not to be taken.


Q: Why do some people report feeling more energetic or excited after taking Hidroxicina Genfar?

Although the drug is primarily a depressant, the official side effect profile lists agitation and confusion as Uncommon reactions. These effects may be experienced by some users as restlessness or over-excitement rather than the typical sedative response.


Q: Can the effectiveness of Hidroxicina Genfar decrease if taken for an extended period?

Studies have not established the effectiveness of the oral form for anxiety symptoms for periods longer than 4 months, requiring periodic reassessment. Official documents also indicate that the common sedative effect of the drug may lessen with continued use over time.


Q: What inactive ingredients are typically included in Hidroxicina Genfar tablets or syrup?

The inactive ingredients vary depending on the physical form (tablet, syrup, etc.). They typically include common pharmaceutical components like lactose and magnesium stearate in tablets. The syrup often contains a small amount of alcohol (0.5%) and liquid sugar.


Q: What does the term 'contraindication' mean when referenced in the product information for Hidroxicina Genfar?

A contraindication is an official statement in the product labeling that the drug should not be used in a specific situation, medical condition (such as a known prolonged QT interval), or with certain other medicines. Using the drug under a contraindication could cause harm.

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How should Hidroxicina Genfar be stored and disposed of?

Storage and Disposal of Hidroxicina Genfar

Hidroxicina Genfar must be stored at controlled room temperature, specifically between 20 C and 25 C (68 F and 77 F). The product must be protected from moisture and kept in a tightly closed container.

All forms of the medication must be stored out of the reach of children.

Disposal Requirement Instruction
Preferred Method Use a drug take-back program or pharmaceutical waste collection point.
Household Method Mix with an undesirable substance (e.g., dirt, coffee grounds) in a sealed bag for disposal in household trash.
Prohibited Action Do not flush the medication down the toilet or pour it down a drain.

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

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