Pafinur

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Pafinur

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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 Pafinur

What is Pafinur?

Pafinur is a medication used primarily to treat symptoms associated with allergic reactions. It belongs to a class of drugs known as second-generation antihistamines, which are designed to counteract the effects of histamine—a natural substance in the body that triggers allergic responses.

Mechanism of Action

The active ingredient in Pafinur is rupatadine. It works through a dual mechanism that distinguishes it from some other antihistamines:

  • Antihistamine activity: It acts as a selective peripheral H1 receptor antagonist, blocking histamine from binding to its receptors and reducing typical allergy symptoms.
  • PAF antagonism: It also inhibits Platelet-Activating Factor (PAF). PAF is a mediator involved in inflammatory processes and bronchial hyperreactivity. By blocking both histamine and PAF, the medication addresses multiple pathways of the allergic response.

Clinical Uses

Pafinur is typically used for the relief of symptoms in the following conditions:

  • Allergic Rhinitis: This includes both seasonal (hay fever) and perennial (year-round) allergies. It helps alleviate sneezing, nasal discharge, itching of the eyes, and nasal congestion.
  • Urticaria: It is used to manage the symptoms of hives, such as localized itching and the development of wheals (raised skin welts).

Characteristics

As a second-generation antihistamine, Pafinur is formulated to provide relief with a reduced likelihood of causing significant drowsiness compared to first-generation alternatives. Its dual-action profile is intended to provide comprehensive management of both the immediate and inflammatory phases of an allergic reaction.

What side effects are possible with Pafinur?

Possible Side Effects and Safety Information

The safety profile of Rupatadine (Pafinur) is officially defined by categorizing adverse reactions based on their observed frequency and the physiological system affected. Adverse effects are classified using standard regulatory terminology, such as Common (ge 1/100 to < 1/10) and Uncommon (ge 1/1,000 to < 1/100).

Adverse Reaction Classifications

The most frequently reported effects, listed as Common, primarily involve the Nervous System (e.g., somnolence, headache, dizziness) and General Disorders (e.g., fatigue, asthenia). Effects such as dry mouth, nausea, diarrhoea, rash, and increased appetite are classified as Uncommon.

Specific regulatory attention is given to serious adverse reactions, particularly those affecting the heart. Documented concerns include the risk of QTc interval prolongation and reports of Torsade de pointes, which are typically rare and documented through post-market surveillance. Severe hypersensitivity reactions, including anaphylaxis and angioedema, are also officially noted in the safety summary.

Safety Constraints and Special Populations

High-level safety constraints include mandatory caution when the medicine is used concomitantly with potent CYP3A4 inhibitors (e.g., ketoconazole, erythromycin), as this can significantly increase systemic exposure to Rupatadine. The regulatory label also advises against the co-administration of grapefruit juice. Regarding specific populations, the safety profile has not been established for children under 2 years of age, and a cautionary approach is advised for older adults due to potential increased sensitivity. Furthermore, the tablet form is considered unsuitable for patients with certain rare hereditary disorders, such as lactose intolerance, due to excipient content.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory documents confirm that no cases of overdose with Rupatadine (Pafinur) were reported during clinical trials. However, information derived from high-dose safety studies and post-marketing reports defines the required emergency response and potential risks associated with the accidental ingestion of very high doses.


Documented Manifestations and Severe Risks

The primary clinical manifestation observed in studies with doses up to ten times the standard therapeutic amount (100 mg daily) was somnolence (drowsiness). While the drug is generally well-tolerated at these high levels, official labeling highlights the risk associated with high systemic exposure.

Of critical regulatory note is the potential for severe, life-threatening cardiovascular effects, including QTc interval prolongation and the rare post-marketing report of Torsade de pointes. This established risk guides the need for close cardiac monitoring as a necessary supportive measure in overdose scenarios.


Required Emergency Actions

It is officially mandated that you seek immediate medical attention and contact emergency services if accidental ingestion of very high doses occurs. The management of Rupatadine overdose is strictly symptomatic treatment together with required supportive measures, as no specific antidote is known.

Therapeutic Uses of Pafinur

Main uses and benefits of Pafinur

Pafinur is an antihistamine medication containing the active substance rupatadine. It is primarily used to manage symptoms associated with allergic reactions by blocking the effects of histamine and platelet-activating factor (PAF), two substances in the body involved in inflammatory and allergic responses.

Seasonal and Perennial Allergic Rhinitis

This medication is used to relieve the symptoms of allergic rhinitis, an inflammation of the nasal passages caused by allergens. It is effective for both seasonal allergies (such as hay fever) and perennial allergies (which occur year-round due to triggers like dust mites or animal dander).

The benefits in treating allergic rhinitis include the reduction of:

  • Sneezing: Decreasing the frequency and intensity of sneezing fits.
  • Nasal congestion: Helping to clear blocked or stuffy nasal passages.
  • Rhinorrhea: Reducing excessive nasal discharge or a runny nose.
  • Nasal and ocular itching: Alleviating itchiness in the nose and eyes.
  • Lacrimation: Reducing watery or tearing eyes.

Urticaria (Hives)

Pafinur is also indicated for the treatment of urticaria, commonly known as hives. This condition is characterized by the sudden appearance of itchy, red, or skin-colored welts on the skin.

When used for urticaria, the medication helps to:

  • Relieve itching: Significantly reducing the intense pruritus associated with hives.
  • Reduce skin lesions: Decreasing the number, size, and duration of wheals or welts on the skin.
  • Improve daily comfort: Minimizing the physical discomfort and skin irritation caused by chronic or acute allergic skin reactions.

Eligibility and Restrictions for Use

Eligibility for Pafinur (Rupatadine): Official Regulatory Profile

Official regulatory documentation defines eligibility for Pafinur based on age, physiological status, and pre-existing medical conditions.

Population Status Regulatory Rule
Approved Age Groups Adults and adolescents mathbf(ge 12 years) are approved for the tablet formulation. Children 2 to 11 years of age are approved for the oral solution.
Contraindicated Groups Patients with known hypersensitivity to rupatadine or any excipient must not use this medicine. Patients with a history of QT prolongation or cardiac arrhythmias are also contraindicated.
Excipient Restrictions The tablet formulation is contraindicated in patients with hereditary problems such as galactose intolerance or total lactase deficiency.
Conditional Use Use is not recommended in patients with impaired renal or hepatic functions due to insufficient clinical experience. Caution is advised for older adults (ge 65 years).
Pregnancy/Lactation As a precautionary measure, use is preferable to avoid during pregnancy and is not recommended while breastfeeding.

This medicine is not recommended for use in children under two years of age, as safety and efficacy have not been established in this age group.

What should I know about interactions with other medicines?

Pafinur Interactions with other medicines and products

Interactions with Pafinur (Rupatadine) are documented primarily based on its metabolic profile, the CYP3A4 enzyme system. The official regulatory documents provide specific restrictions for certain combinations.


Medicines and Substances with Documented Interactions

Interaction Type Examples of Interacting Medicines/Substances Regulatory Classification
Potent CYP3A4 Inhibitors Ketoconazole, Itraconazole, Clarithromycin, HIV Protease Inhibitors Avoided (Results in a sim10-fold increase in Rupatadine exposure)
Moderate CYP3A4 Inhibitors Erythromycin, Fluconazole, Diltiazem Caution Required (Results in a sim2- to 3-fold increase in exposure)
QTc-Prolonging Drugs Various (Not individually listed) Contraindicated (In patients with certain cardiac risks)
CNS Depressants Alcohol, other CNS depressant medicines Caution Required (May increase psychomotor impairment)
Narrow Therapeutic Window Substrates Cyclosporin, Cisapride, Tacrolimus Caution Required (Rupatadine is a mild CYP3A4 inhibitor)

Exposure, Food, and Population Constraints

  • Grapefruit Juice: The concomitant administration of Grapefruit Juice must be avoided or not taken simultaneously, as it increases Rupatadine systemic exposure by approximately 3.5-fold.
  • Clearance Concerns: Use of Pafinur is currently not recommended in patients with known impaired kidney or liver functions, which influences the risk of accumulation and interaction severity.
  • Elderly Population: Caution is recommended when administering the medicine to individuals over 65 years of age.

Mechanism of Action

Molecular Target and Interaction

Pafinur acts as a selective antagonist of the platelet P2Y12 receptor, which is a G i-coupled protein receptor located on the platelet surface. The pharmacodynamic mechanism involves reversible, high-affinity binding to the receptor structure.


Intracellular Cascade Inhibition

This antagonism directly blocks the binding of ADP (adenosine diphosphate) to the P2Y12 receptor. ADP binding is a crucial signal required for full platelet activation. By inhibiting this initial signaling step, Pafinur prevents the subsequent intracellular cascade, including the activation and conformational change of the platelet GP IIb/IIIa receptor complex ( integrin alphaIIbbeta3).


Physiological Consequence

The inhibition of the GP IIb/IIIa complex prevents it from binding fibrinogen and von Willebrand factor, which are essential for forming cross-links between platelets. This action reduces downstream platelet-platelet adhesion and thrombus stabilization. The cumulative effect is a sustained reduction in overall platelet aggregation capacity.

Dosage and Administration Information

Administration Method

Pafinur is typically administered orally. The tablets should be swallowed with a sufficient amount of liquid, such as a glass of water.

Timing and Food Intake

The absorption of the active ingredient is generally not significantly affected by food. Therefore, the medication can be taken either with meals or on an empty stomach. Consistency in the time of day the medication is taken can help maintain steady levels of the substance in the body.

Handling and Storage

Tablets should be kept in their original blister packaging until the time of use to protect them from environmental factors. Store the medication in a cool, dry place, away from direct sunlight and moisture.

Special Populations

For individuals who have difficulty swallowing solid tablets, it is important to consult a healthcare professional regarding alternative methods of administration or specific techniques to facilitate swallowing. The tablets are designed to be taken whole unless otherwise specified by a healthcare provider.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Pafinur

Reviewing Clinical Study Methods

The information presented here is based on clinical research that was studied for Pafinur. Most of the available evidence comes from studies where researchers explored how symptoms changed over a defined time interval. This contributes to understanding how findings describe group patterns, not personal outcomes. These studies help show what has been observed so far, but research does not determine whether an individual will respond similarly.

Evidence for use in Chronic Idiopathic Urticaria (Hives)

A number of research studies was conducted during periods of increased symptom activity to evaluate Pafinur in adults with Chronic Idiopathic Urticaria (CIU), a condition characterized by fluctuating or episodic manifestations of hives. These studies primarily focused on assessments of physical discomfort, such as itch intensity, and assessments of episodic or acute change, specifically the frequency and severity of the hive breakouts.

The findings from this body of research indicate differences in these specific patient-reported outcomes describing perceived discomfort when compared to a non-active treatment (placebo). Research highlights patterns of change measured during the study period within the observed populations.

Evidence for use in Seasonal Allergic Rhinitis (Hay Fever)

Research examined Pafinur in individuals with Seasonal Allergic Rhinitis, a condition characterized by periods of heightened symptoms (e.g., sneezing, itchy eyes) during certain times of the year. The primary goal of these studies was to explore outcomes linked to inflammatory or irritative states in the nose and eyes, and also patient-reported outcomes related to daily functioning or activity level.

Studies report how symptoms evolved in the observed populations during exposure to seasonal allergens. Data reflect patterns related to symptom assessments, such as nasal irritation, recorded during the study periods.

Long-term Studies and Follow-up

This section summarizes research that explored the course of symptoms over a longer duration, beyond the initial weeks of treatment. This long-term research aims to provide insight into the patterns of response over time. Evidence is limited regarding long-term patterns when Pafinur was studied for very extended periods (many months or years), and long-term effects are not fully established.

What is Still Uncertain About Pafinur

Despite the research conducted, some areas related to Pafinur remain uncertain and require further study. Research has explored many outcomes, but in some instances, findings were mixed. Evidence highlights what is known — and what is still uncertain. The state of the evidence for Pafinur's influence on certain outcomes related to systemic or functional imbalance across all studied populations is still emerging.

Frequently Asked Questions (FAQ)

Common questions about Pafinur (FAQ)


Q: What is the main condition Pafinur is approved to treat?

A: According to official product information, Pafinur (Rupatadine) is approved for the symptomatic relief of allergic rhinitis, which includes both seasonal and perennial forms. It is also indicated for relieving the symptoms associated with chronic spontaneous urticaria (CSU), such as pruritus (itching) and hives.


Q: Are there any foods or drinks I need to avoid while using Pafinur?

A: Regulatory documents state that co-consumption with grapefruit juice should be avoided during treatment with Pafinur. This restriction is necessary because grapefruit juice can increase the amount of the active ingredient (Rupatadine) in the body's circulation.


Q: Can Pafinur be taken with common over-the-counter cold medicines?

A: Official product information advises caution when taking this medicine with central nervous system (CNS) depressants. Some common cold medicines may fall into this category. The combination may potentially increase cognitive or psychomotor impairment, meaning it could affect your thinking or coordination.


Q: Is there a maximum amount of time someone can safely use Pafinur?

A: Clinical studies have investigated the use of Pafinur in adults for periods extending up to one year. However, evidence regarding long-term safety for children (ages 2 to 11) is more limited, with most clinical trial data covering up to 6 weeks of use.


Q: Does Pafinur work differently for older adults compared to younger people?

A: Official documents indicate that information on the use of Pafinur in individuals over 65 years of age is limited. Because of this, the possibility that some older individuals may have a higher sensitivity to the medicine cannot be ruled out.


Q: Is Pafinur considered safe for long-term use?

A: Evidence from clinical studies has explored the long-term use of the active ingredient in Pafinur. These studies report that Rupatadine was well-tolerated and showed a favorable safety profile when studied at the recommended therapeutic dose for up to 12 months.


Q: Does Pafinur interact with blood pressure medication?

A: Official warnings state that caution is required if Pafinur is taken with certain blood pressure medicines, specifically those classified as moderate CYP3A4 inhibitors like Diltiazem. Additionally, the medicine is contraindicated for use with any other drugs known to prolong the QTc interval (which can include some cardiac medicines).


Q: Is it true that alcohol should be avoided completely while on Pafinur?

A: Studies indicate that, at the recommended therapeutic dose, Pafinur does not increase the degree of drowsiness caused by alcohol. However, official information still advises caution, as taking higher doses of the medicine in combination with alcohol may lead to cognitive or psychomotor deterioration.


Q: What are the signs of a serious or rare side effect from Pafinur?

A: Serious adverse reactions documented in the safety profile may manifest as a fast or irregular heartbeat, severe dizziness, or fainting. Signs of a severe allergic reaction could include swelling of the face, tongue, or throat, or trouble breathing.


Q: Can Pafinur affect my ability to drive or operate machinery?

A: According to official product information, Pafinur is generally not expected to influence the ability to drive or operate machinery when used at the recommended dosage. However, official guidance recommends exercising care until an individual understands their personal reaction to the treatment.


Q: Can I use Pafinur if I have allergies to other medications?

A: The official documents state that Pafinur is contraindicated for individuals with a known hypersensitivity, or severe allergy, to the active ingredient, Rupatadine, or to any other components (excipients) in the formulation. The documents do not specifically address allergies to other unrelated medicines.


Q: Are there any demographic groups where Pafinur's effects are weaker?

A: Clinical trials reviewed for regulatory approval did not observe any overall differences in the effectiveness of Pafinur across various age groups. However, official information indicates that a higher sensitivity to the medicine in some older individuals (over 65 years) cannot be excluded.


Q: How quickly should I expect to feel an effect after taking Pafinur?

A: Studies and official information indicate that Pafinur has a fast onset of action. The active ingredient reaches its maximum concentration in the body quickly, and clinical trials have noted that significant improvement in some symptoms began within the first day of treatment.


Q: Does Pafinur have a generic version available yet?

A: Pafinur is a brand name for the active ingredient, Rupatadine. This active ingredient is also marketed under various other trade names and generic formulations.


Q: How long does the effect of a dose of Pafinur usually last?

A: The medicine is formulated for once-daily dosing based on its sustained effects. Its elimination half-life—the time it takes for half of the drug to be removed from the body—is reported to be approximately 5.9 hours in adults.


Q: Is there any risk of developing a dependence on Pafinur?

A: According to official information, Rupatadine is not classified as a controlled substance under US federal drug schedules. This classification indicates that the medicine is not considered to have a significant potential for abuse or dependence.


Q: Is Pafinur a controlled substance?

A: Official sources confirm that Rupatadine is a prescription-only medicine. Furthermore, it is not classified as a controlled substance according to US federal schedules.


Q: Do I need a prescription to get Pafinur?

A: Regulatory documents in many jurisdictions, including Canada and the European Union, classify Rupatadine as a prescription-only medicine. Therefore, an authorization from a healthcare professional is required to obtain it.


Q: Is Pafinur suitable for people with diabetes?

A: There is no general contraindication listed for the active ingredient itself in people with diabetes. However, patients should be aware that the oral solution formulation contains sucrose. Because of this, the oral solution is contraindicated for individuals with certain rare hereditary problems, such as fructose intolerance.


Q: What happens if I accidentally take more Pafinur than intended?

A: Official product information advises contacting a poison control center or seeking medical assistance immediately if more than the intended dose of Pafinur is accidentally taken. This is due to the limited information available regarding the effects of severe overdose.


Q: Is it necessary to have blood work done while taking Pafinur?

A: Clinical trials conducted during the medicine's development did include monitoring of blood chemistry and hematologic findings. However, the official regulatory documents do not currently mandate routine blood work for all patients taking this medicine.

How should Pafinur be stored and disposed of?

Storage and Disposal of Pafinur (Rupatadine)

The storage and disposal of Pafinur tablets must strictly follow regulatory guidance to maintain product integrity and safety.

Mandatory Storage Conditions

Requirement Official Regulatory Instruction
Temperature Store at room temperature, typically between 15 C and 30 C.
Protection Must be protected from light and moisture.
Packaging Keep the tablets in the original outer carton and blister package until use.
Child Safety Keep this medicine out of the sight and reach of children.

Disposal Instructions

The official labeling mandates specific waste handling procedures for unused or expired product.

  • Prohibited Methods: Do not dispose of the medicine via wastewater or household waste.
  • Required Procedure: Unused product or waste material must be disposed of in accordance with local regulations, often achieved by returning it to a pharmacist.

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

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