Aerius

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Aerius

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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 Aerius

Property Description
Active ingredient Desloratadine
Form Tablet, Syrup, Oral Solution
Pharmacological class H1 Receptor Antagonist
General purpose Anti-allergic agent
Origin Synthetic metabolite of Loratadine

What Type of Medicine is Aerius (Desloratadine)?

Aerius is a pharmaceutical preparation containing the single active ingredient Desloratadine, which is classified as a second-generation H1-antihistamine. This class of medicine functions as a selective Histamine H1 Receptor Antagonist, countering the effects of the inflammatory mediator Histamine in peripheral tissues. Desloratadine's mechanism provides effective relief from symptoms associated with allergic conditions. The drug is clinically recognized for its efficacy in providing substantial relief over a 24-hour period. Desloratadine is specifically engineered to be non-sedating because it exhibits minimal penetration of the central nervous system, a key factor supported by pharmacological studies.

Composition, Origin, and Forms

The active ingredient, Desloratadine, is a synthetic compound that is chemically recognized as the major active metabolite of the older drug Loratadine. This chemical structure ensures that the substance is inherently active upon oral administration, guaranteeing a consistent physiological effect. Aerius is made available in several dosage forms, notably the syrup and oral solution forms, which are specifically utilized to accommodate pediatric and younger patient groups, alongside the standard film-coated tablet.

General Purpose and Core Benefit

The fundamental purpose of this medicine is to serve as a long-acting anti-allergic agent that provides sustained relief over a 24-hour cycle. The mechanism operates through selective H1-receptor antagonism, which primarily prevents Histamine from initiating the allergic cascade in peripheral tissues. Desloratadine is used primarily for its properties as an antiallergy medication that offers sustained efficacy. The core benefit is the sustained prevention or reduction of the body's inflammatory and symptomatic response to allergens.

Regulatory References

  1. Reviews by the National Institutes of Health (NIH)

What side effects are possible with Aerius?

The possible side effects and safety characteristics of Aerius (Desloratadine) are formally classified by government regulatory authorities based on clinical trial and post-marketing data.

Frequency-Classified Adverse Reactions

Adverse reactions are grouped by the estimated rate of occurrence relative to placebo in clinical studies. Common effects (ge 1/100 to < 1/10 patients) in adults and adolescents include headache, fatigue, and dry mouth. The official labeling indicates these effects are often reported at rates similar to placebo.

Events reported rarely or during post-marketing surveillance are classified as Very Rare (< 1/10,000) or Not Known (frequency cannot be estimated). These can involve multiple System-Organ Classes, including:

  • Nervous System and Psychiatric: Dizziness, somnolence, insomnia, and reports of seizures or hallucinations.
  • Hepatobiliary: Elevations of liver enzymes, increased bilirubin, and cases of hepatitis and jaundice.
  • Immune/General: Severe hypersensitivity reactions (e.g., anaphylaxis, angioedema) have been reported.

Population-Specific Safety Considerations

Safety statements are explicitly included for certain patient groups in regulatory documents:

  • Severe Organ Impairment: Caution is advised when the medicine is used in patients diagnosed with severe renal impairment or severe hepatic impairment due to the potential for increased drug exposure.
  • Pediatric Observations: Specific adverse reactions were observed in infants and toddlers (e.g., diarrhoea, fever). Furthermore, retrospective safety studies have noted an increased incidence of new-onset seizures in the pediatric population, particularly in the 0–4 years age group.

Safety Restrictions and Limitations

The medicine is formally contraindicated in individuals with a known hypersensitivity to the active substance, any of its components, or to loratadine. Caution is also advised for patients with a medical or familial history of seizures.

These domains establish a transparent, fact-based framework used by government authorities to define the drug's risk profile, focusing strictly on which effects are documented, their regulatory frequency, and the specific populations requiring caution.

Overdose and Emergency Response

Overdose and When to Seek Help

The officially documented overdose profile for Aerius (desloratadine) is defined by specific clinical manifestations and mandated emergency response actions, as detailed in regulatory documents.

Documented Manifestations and Outcomes

The adverse event profile reported in cases of overdosage is consistently documented as similar to that seen with therapeutic doses, though the magnitude of these effects can be higher. Somnolence (drowsiness) is the most specific clinical manifestation reported in controlled trials using supratherapeutic doses. Potential serious outcomes noted in post-marketing data include cardiovascular effects such as tachycardia, palpitations, and QT prolongation.

In the paediatric population, the event profile is similar to standard use, but the potential magnitude of effects can be higher.

Emergency Action and Management

In the event of a suspected or known overdose, regulatory guidance requires that an individual contact a medical professional immediately. Urgent medical help is required, and official sources recommend calling emergency services if severe symptoms, such as collapse or trouble breathing, occur.

Treatment is symptomatic and supportive; medical professionals may consider standard measures to remove unabsorbed active substance. A crucial constraint for hospital management is that desloratadine is not eliminated by haemodialysis.

Therapeutic Uses of Aerius

Quick Facts

  • Condition 1: Management of symptoms associated with allergic rhinitis (inflammation of the nasal passages).
  • Condition 2: Management of symptoms associated with urticaria (hives; a skin condition).
  • Relief Provided: Supports the temporary reduction of sneezing, runny or itchy nose, congestion, itching of the palate, and ocular symptoms (itchy, red, or tearing eyes).
  • Additional Relief: Supports the temporary reduction of pruritus (itching) and the size and number of hives.

What Aerius Treats: Main Uses and Benefits

Aerius is a medicinal product utilized for the symptomatic management of conditions related to allergic response. Its therapeutic purpose is centered on providing relief from symptoms impacting the nose, eyes, and skin.

Its primary authorized use is to address the symptoms of allergic rhinitis, a condition involving inflammation of the nasal passages due to an allergen. This includes both seasonal (e.g., hay fever) and perennial allergic rhinitis. Common associated symptoms that the medication is intended to relieve include sneezing, an itchy or runny nose, nasal congestion, and issues affecting the eyes such as itching, tearing, or redness.

A second principal use for Aerius is in the management of chronic idiopathic urticaria (hives). For individuals with this skin condition, the medication is designated to support the reduction of common related symptoms, specifically the itching (pruritus) and the visibility (size and number) of the hives.

Regulatory References

  1. EMA therapeutic overview

Eligibility and Restrictions for Use

Official Eligibility Rules for Aerius (Desloratadine)

The official regulatory profile strictly defines the patient groups who may or may not use Aerius, based on age, physiological status, and underlying health conditions.

Classification Population Status
Absolute Contraindication Patients with known hypersensitivity to the active ingredient desloratadine, its parent compound loratadine, or any formulation excipients.
Not Recommended Pregnant women (use is preferably avoided due to insufficient data); Breastfeeding women (the substance is excreted into breast milk); and Infants under six months of age (safety and efficacy are not established).
Use With Caution Individuals with severe renal impairment (kidney dysfunction) or hepatic impairment (liver dysfunction). Use is also advised with caution for patients with a personal or familial history of seizures.

Age-Group Eligibility: Aerius tablets are approved for use in adults and adolescents 12 years and older. Oral solution/syrup forms are approved for use in children starting from six months of age. Use in infants younger than six months is not established by regulatory agencies.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Aerius (desloratadine) is generally associated with a low risk of clinically significant drug interactions. However, it is essential to inform your healthcare provider about all prescription, over-the-counter (OTC) medicines, vitamins, and herbal supplements you are currently taking.

Reported Drug Interactions

Clinical studies have investigated the co-administration of desloratadine with several other drugs. Although some interactions resulted in increased plasma concentrations of desloratadine, these changes were not found to be clinically relevant in terms of the drug's safety profile for most patients.

Key medications that have been studied include:

Medicine Class Examples (Active Ingredient) Observed Interaction Effect
Antifungal Ketoconazole Increased desloratadine concentration (not clinically relevant)
Macrolide Antibiotic Erythromycin, Azithromycin Increased desloratadine concentration (not clinically relevant)
H2-Receptor Antagonist Cimetidine Increased desloratadine concentration (not clinically relevant)

Alcohol and Other Central Nervous System Depressants

Desloratadine, when taken alone, does not appear to potentiate the performance-impairing effects of alcohol in clinical pharmacology trials. Nonetheless, cases of alcohol intolerance and intoxication have been reported post-marketing. As individual responses can vary, it is recommended to exercise caution regarding alcohol consumption while taking this medication. Co-administration with other central nervous system depressants (e.g., sedatives) should be discussed with a doctor, as the risk of increased sedation may exist.

Mechanism of Action

Targeting the Peripheral Histamine mathbfH1 Receptor

This mechanism operates by targeting the Histamine mathbfH1 Receptor in the body's peripheral systems, such as in vascular endothelium and nerve endings. Desloratadine acts as an antagonist, binding to the receptor to prevent the inflammatory mediator Histamine from initiating its physiological signaling cascade. This action limits the Histamine-driven activation of sensory nerves and modulates the Histamine-induced increase in capillary permeability.


Interference with Acute Histamine-Mediated Signaling

The drug's mechanism extends beyond direct receptor blockade to interfere with the broader acute inflammatory cascade. Desloratadine engages secondary pathways by inhibiting the release of certain proinflammatory cytokines and suppressing the expression of adhesion molecules, which are molecular signals for immune cell recruitment. This action interferes with the molecular process of inflammatory signaling amplification, influencing the duration of pathway modulation.


Mechanistic Basis for Peripheral Selectivity

A core mechanistic feature is the drug's limited ability to cross the blood-brain barrier. This high degree of peripheral selectivity confines the receptor antagonism to the systemic and superficial tissues where the inflammatory signals originate. By sparing the central Histamine receptors, the mechanism limits mathbfH1 receptor interaction in the central nervous system.

Dosage and Administration Information

How Aerius is Used: Official Administration Guidelines

The administration of Aerius (desloratadine) follows specific guidelines based on prescribing information. These guidelines establish the appropriate route, frequency, and dosing rules based on age and clinical factors.


Administration and Dosing Schedule

Aerius is intended for oral administration only. The drug should be taken once daily and may be administered with or without food.

Age Group Recommended Daily Dose (Once Daily) Official Form Special Instructions
Adults & Adolescents (ge 12 years) 5 mg Tablet or Oral Solution No dosage adjustment for older adults.
Children (6 to 11 years) 2.5 mg Oral Solution (Syrup) Tablet form is not suitable.
Children (12 months to 5 years) 1.25 mg Oral Solution (Syrup) Oral Solution must be measured using a calibrated device.
Infants (6 to 11 months) 1 mg Oral Solution (Syrup) Dosage for this group is established via Oral Solution.

Specific Use Instructions

  • Patients with Renal or Hepatic Impairment: For adults with severe renal or hepatic impairment, a modified starting dose of 5 mg every other day is recommended based on pharmacokinetic data.
  • Missed Dose: If a dose is missed, it should be taken as soon as the patient remembers; however, if it is nearly time for the next scheduled dose, the missed dose should be skipped, and the regular schedule resumed. Do not take a double dose.
  • Duration of Use: For patients with intermittent symptoms (present for less than four days per week or for less than four weeks), administration may be discontinued when symptoms are resolved and restarted if they reappear. For persistent symptoms, continued administration during allergen exposure may be maintained.

Recent Clinical Evidence

Overview of Clinical Research

Aerius (desloratadine) is a second-generation H1-antihistamine. Clinical trials and post-marketing surveillance studies have investigated its use for conditions associated with histamine-mediated inflammation, primarily allergic rhinitis (AR) and chronic spontaneous urticaria (CSU).

Research has specifically focused on evaluating its effect on both nasal (such as rhinorrhea, itching, and sneezing) and non-nasal (such as eye itching and watering) symptoms of allergic rhinitis.


Key Findings in Approved Indications

  • Allergic Rhinitis (AR): Studies comparing desloratadine to placebo consistently report a reduction in total symptom scores (TSS) in participants with both seasonal and perennial allergic rhinitis. Some meta-analyses suggest observed symptomatic benefits are accompanied by positive changes in objective measures, such as nasal obstruction.
  • Chronic Spontaneous Urticaria (CSU): Clinical trials indicate that desloratadine administration is associated with a significant decrease in key CSU symptoms, including pruritus (itching), the number of hives, and the size of the largest wheal. Outcomes related to improved quality of life (QoL) and reduced sleep disturbance were also observed in study participants.

Tolerability and Higher Doses

Desloratadine has been extensively evaluated for tolerability across various patient populations. In multiple trials, the incidence of adverse events (AEs), including somnolence (drowsiness) and headache, was reported to be similar between desloratadine and placebo groups.

Recent research has also investigated the use of desloratadine at doses higher than the commonly approved 5 mg daily dose for CSU in patients who did not respond adequately to the conventional dose. These studies analyzed the safety and symptom-control changes associated with the higher doses.

Frequently Asked Questions (FAQ)

Common questions about Aerius (FAQ)


Q: Is Aerius generally considered to be a non-drowsy medication?

A: Official documents describe this medicine as a non-sedating, second-generation antihistamine. This is because the active ingredient has minimal ability to cross the blood-brain barrier. The incidence of drowsiness in many clinical studies was reported to be similar to the rates seen with placebo.


Q: Can Aerius be taken alongside common pain relievers?

A: Clinical studies have investigated interactions between the active ingredient and specific medications. Official documents have not reported known interactions with common pain-relieving ingredients such as ibuprofen or acetaminophen. Official guidance emphasizes informing a healthcare provider about all prescription and over-the-counter medicines being taken.


Q: Can Aerius cause dry mouth or drowsiness?

A: Official safety information reports dry mouth as a common side effect, which means it may occur in up to 1 in 10 patients. Drowsiness, or somnolence, is classified as a very rare effect, occurring in less than 1 in 10,000 patients.


Q: Is Aerius available without a prescription in some places?

A: The legal availability of this medicine is determined by the specific regulations of each country or region. Therefore, the status of the medicine—whether it is available over-the-counter (OTC) or requires a prescription—can vary depending on your location.


Q: Are there any specific foods or drinks to avoid while taking Aerius?

A: Official information states that the medicine may be taken with or without food. Official guidance recommends caution regarding alcohol consumption due to post-marketing reports of alcohol intolerance or intoxication.


Q: Can Aerius be taken by people with kidney or liver issues?

A: Caution is noted in official documents for patients with severe kidney or liver impairment. For adults with these specific conditions, official guidelines describe a modified starting dose (e.g., taking the medicine every other day) based on how the body processes the drug.


Q: What should be done in the event of taking too much Aerius?

A: In the event of an overdose, the types of side effects observed are similar to those at therapeutic doses, but the effects may be more pronounced. Measures to remove unabsorbed active substance and providing symptomatic and supportive treatment are the standard medical considerations.


Q: Are there any known interactions between Aerius and herbal supplements?

A: Official labeling advises patients to inform their healthcare provider about all herbal supplements they are taking. There is generally limited specific data reported in regulatory sources regarding interactions between the active ingredient and herbal remedies.


Q: Are there any specific symptoms that indicate Aerius is not right for a person?

A: Official labeling indicates that the medicine should be stopped, and immediate medical attention sought, if certain severe symptoms occur. These may include signs of a severe allergic reaction (such as swelling of the face, lips, or throat) or other serious events like seizures or liver dysfunction (jaundice).


Q: How is Aerius different from other desloratadine products?

A: Aerius contains the active ingredient desloratadine. Other medicines containing desloratadine are often generic versions that are proven to be bioequivalent. This means they contain the same amount of active substance and are expected to produce the same effect as the brand-name product.


Q: What does official guidance say about using Aerius with other allergy medicines?

A: Official guidance notes that co-administration with other central nervous system depressants (medicines that slow brain activity) should be discussed with a healthcare provider. This is because combining certain medicines, which may include some sedating allergy medications, could increase the risk of sedation.


Q: What official information is available regarding the long-term use of Aerius?

A: For patients who experience symptoms persistently, continued administration of the medicine may be maintained during allergen exposure periods. Regulatory bodies periodically assess long-term safety; for instance, a safety review found no established link between the medicine and an abnormal heart rhythm.


Q: What does the term 'non-sedating' mean when applied to Aerius?

A: The term 'non-sedating' is used because the medicine is a selective antagonist that has a limited ability to cross the blood-brain barrier. This means its activity is largely confined to peripheral body tissues, minimizing interaction with histamine receptors in the central nervous system.


Q: Does Aerius require a dose adjustment for elderly patients?

A: Official prescribing information indicates that no specific dosage adjustment is required for older adults or the elderly. However, older patients are more likely to have co-existing kidney or liver issues, and those conditions may necessitate a dose modification.


Q: Why might a doctor prescribe Aerius instead of a first-generation antihistamine?

A: Official documents classify this medicine as a second-generation H1-antihistamine. This class of medicine is recognized for its peripheral selectivity and minimal blood-brain barrier penetration, which are associated with a reduced potential for causing sleepiness compared to some first-generation antihistamines.


Q: What are the most common reasons people stop taking Aerius?

A: Patients are instructed to stop taking the medicine if a severe allergic reaction occurs. The most common side effects reported in clinical trials that occurred more frequently than with a placebo included pharyngitis (sore throat), dry mouth, muscle pain (myalgia), and fatigue.


Q: What are the general expectations for relief when taking Aerius?

A: The medicine is intended to provide sustained relief over a 24-hour cycle from symptoms associated with allergic rhinitis and urticaria. This relief from symptoms like sneezing, itching, hives, and runny nose may help support normal daily activities and sleep.

How should Aerius be stored and disposed of?

Storage and Disposal Requirements for Aerius (Desloratadine)

Official regulatory documents define specific conditions for storing and disposing of Aerius to maintain the medicine's integrity and safety.

Storage Conditions

Requirement Official Instruction
Temperature Do not store above 30 C.
Protection Store in the original package to protect the medicine from moisture.
Child Safety Keep out of the reach and sight of children.

Handling and Stability

The medicine must remain in its original package until use. For presentations like orodispersible tablets, the dose must be taken immediately upon opening the individual blister.

Disposal Guidelines

Aerius does not carry any special hazardous-waste designation in official labeling. Unused medicine should be disposed of according to standard governmental regulations, such as through authorized take-back programs or by securing it in household trash following recommended guidelines.

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

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