Azomyr

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Azomyr

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Medically reviewed

Rosario Oropesa

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 Azomyr

What is Azomyr?

Azomyr is a medication used to relieve symptoms associated with allergic rhinitis, which is an inflammation of the nasal passages caused by an allergy, such as hay fever or dust mite allergy. These symptoms typically include sneezing, a runny or itchy nose, itching of the palate, and itchy, red, or watery eyes.

Additionally, Azomyr is used to relieve the symptoms of urticaria, a skin condition characterized by itching and hives.

How it Works

The active substance in Azomyr is desloratadine. Desloratadine is an antihistamine that works by blocking the receptors for histamine, a chemical in the body that causes allergic symptoms. By preventing histamine from binding to its receptors, the medication helps to reduce or eliminate the allergic response.

Characteristics

Azomyr is a non-sedating antihistamine, meaning it is designed to provide relief from allergy symptoms without causing significant drowsiness in most individuals. It has a long-lasting effect, which allows for consistent symptom management over a 24-hour period.

Regulatory References

  1. U.S. National Library of Medicine (NLM/NIH)

What side effects are possible with Azomyr?

Possible Side Effects and Safety Information

The official safety profile for Azomyr (Desloratadine) is established by regulatory documents, which categorize potential adverse reactions based on frequency and the physiological system affected. The most frequently reported adverse reactions in adults and adolescents are classified as Common.

Frequency-Classified Adverse Reactions

Classification Examples (as listed in official sources)
Common (Reported 1/100, <1/10) Headache, Dry mouth, Fatigue
Very Rare (Reported <1/10,000) Seizures, Hepatitis, Hallucinations, Tachycardia, Nausea, Diarrhoea
Frequency Not Known QT prolongation, Aggression, Weight gain, Abnormal behaviour

Adverse reactions are formally grouped by the body system affected, including Nervous System Disorders, Gastrointestinal Disorders, Hepatobiliary Disorders, and Cardiac Disorders.

Serious and Population-Specific Safety

Reactions documented as Very Rare include severe hypersensitivity (Anaphylaxis), Seizures, and Hepatitis. A potentially serious cardiac safety concern, QT prolongation, is also listed with a frequency of Not Known.

The label includes specific considerations for special populations. Increased systemic exposure to Desloratadine has been documented in individuals with severe renal or hepatic impairment. For the pediatric population, specific common reactions reported in children aged 1 to 2 years include Diarrhoea, Fever, and Insomnia. Additionally, regulatory documents note that the most common reactions may be more frequently observed at the start of treatment.

Safety constraints noted in the label include the general contraindication for known hypersensitivity and a caution for patients with a medical history or family history of seizures.

Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory information describes the presentation of an overdose of Azomyr (Desloratadine) based on observed clinical experience and trials. The adverse event profile associated with an acute overdose is similar to that seen with standard therapeutic doses, though the magnitude of the effects can be higher.

Documented Overdose Manifestations

Symptoms reported in clinical trials involving high doses included somnolence (drowsiness). Other frequent adverse reactions, such as fatigue, dry mouth, and headache, may also present with increased intensity. Regulatory trials involving single daily doses up to 45 mg over ten days reported no clinically relevant effects in volunteers and confirmed no significant prolongation of the QTc interval, a measure of heart function.

Required Emergency Actions

In the event of a suspected overdose, it is essential to contact a doctor, pharmacist, or nurse immediately. Official guidance confirms there is no specific antidote known for Desloratadine. Therefore, treatment is focused on providing symptomatic and supportive care.

Healthcare professionals may consider standard measures to remove any unabsorbed active substance. It is documented in official labeling that Desloratadine is not eliminated by haemodialysis. The adverse event profile for the paediatric population is similar to adults, but the potential for a higher magnitude of effects also exists.

Therapeutic Uses of Azomyr

Azomyr (Desloratadine) is used to offer supportive symptomatic relief across key allergic domains, particularly when symptoms interfere with daily comfort. It is generally applied in clinical settings marked by increased discomfort driven by heightened physiological activity. Azomyr is indicated for the relief of symptoms associated with allergic rhinitis and chronic urticaria.

The medication is commonly used to help address symptom clusters that may become intense or disruptive, such as those related to Allergic Rhinitis (including hay fever and perennial forms) and Chronic Idiopathic Urticaria (CIU). It is applied across domains where additional symptomatic support is needed.


Managing Allergic Rhinitis: Nasal and Ocular Symptoms

This use targets the difficult combination of symptoms, specifically sneezing, rhinorrhea (runny nose), and nasal itching, alongside eye symptoms like tearing, itching, and redness. Supportive relief is generally intended to help patients cope more steadily with these often seasonal or continuous episodes.

“This medicine is commonly used to help address symptom clusters that may become intense or disruptive.”


Control of Chronic Idiopathic Urticaria (Hives)

Azomyr is relevant in conditions characterized by recurrent or persistent skin reactions, such as CIU. It is applied in scenarios where symptoms create noticeable functional strain, aiming to provide supportive therapeutic benefit by managing the distressing manifestations of widespread itching (pruritus) and generally applied to help manage the physical manifestation of wheals (hives). This use supports general well-being and may assist with maintaining functional stability during symptomatic phases.

Quick Fact: Relief for Key Symptoms Description
Symptom Axes Nasal congestion, itching (skin/nose/eyes), and wheal reduction.
Typical Context Seasonal flare-ups and recurrent chronic skin reactions.
Core Benefit Contributes to easing the overall symptom load for 24 hours.

Regulatory References

  1. European Medicines Agency (EMA) product information

Eligibility and Restrictions for Use

The eligibility for Azomyr (Desloratadine) is strictly defined by official regulatory criteria, detailing which population groups can and cannot use the medicine.

Eligibility Scope: Who Can and Cannot Use Azomyr

Category Eligibility Status as Stated in Label
Contraindications Hypersensitivity to Desloratadine, Loratadine, or any formulation excipients.
Age-Related Eligibility Approved for adults and adolescents (≥ 12 years) (tablets); efficacy is not established for infants under 6 or 12 months.
Conditional Eligibility Requires caution and a mandatory dose adjustment in adults with severe renal impairment or hepatic impairment.
Physiological Status Not recommended during pregnancy or lactation.
Comorbidity Limitations Contraindicated in specific metabolic disorders like Galactose Intolerance (for tablets) or Phenylketonuria (for ODT).

Official Eligibility Classifications

Official regulatory documents classify use based on categories like Contraindicated, Not Recommended, and Use Not Established. These classifications are based on parameters like the patient's age, specific organ function status, and hypersensitivity profile. This structure ensures that use is limited to the populations for which sufficient supporting data is available.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Regulatory documents define the interaction profile of Azomyr (Desloratadine) through documented pharmacokinetic changes and specific substance cautions, while noting a general lack of clinically relevant interactions with tested compounds.


Documented Pharmacokinetic Outcomes

Co-administration with Ketoconazole (an antifungal) and Erythromycin (an antibiotic) leads to formally measured increased plasma concentrations (Cmax and AUC) of desloratadine. Despite these measured increases in drug exposure, clinical studies cited in regulatory dossiers found these changes to be not clinically relevant in terms of the product's overall safety profile, including cardiac assessments.


Interactions with Ingested Substances and Clearance

Substance Official Interaction Statement
Food or Grapefruit Juice Has no documented effect on the bioavailability of desloratadine. Tablets may be taken with or without food.
Alcohol Clinical studies show no potentiation of alcohol's performance-impairing effects. However, a caution is recommended due to post-marketing reports of alcohol intolerance and intoxication.

Population-Specific Considerations

Patients with severe renal impairment or hepatic impairment exhibit significantly increased systemic exposure to desloratadine (up to a 2.5-fold increase in AUC), which reflects altered drug clearance in these populations. This pharmacokinetic change is noted in regulatory labels.

Mechanism of Action

Selective Pharmacodynamic Mechanism

Desloratadine's mechanism of action is defined by its selective engagement with the Peripheral Histamine H1-Receptor. The molecule functions as an inverse agonist, binding to the receptor and stabilizing its inactive conformation. This action not only competitively blocks the binding of the endogenous mediator, histamine, but also actively suppresses the receptor's constitutive activity, thereby interrupting the H1-receptor signaling sequence that regulates immediate inflammatory and vascular responses.


Anti-Inflammatory Pathway Modulation

Beyond receptor blockade, Desloratadine provides a distinct non-receptor inhibitory effect on key immune cells, including mast cells and basophils. This action limits the release of various pro-inflammatory mediators, such as specific leukotrienes (LTC4) and cytokines (IL-4, IL-6). The suppression of this downstream mediator release results in the modulation of the generalized inflammatory response and influences the duration of the drug's physiological action.


Vascular and Tissue Consequence

The peripheral H1-receptor blockade prevents histamine from initiating signaling on the vascular endothelium. This physiological stabilization limits the leakage of fluid and proteins from the bloodstream into the surrounding tissues, which is the foundational physiological mechanism for inhibiting histamine-induced tissue fluid accumulation and the associated increase in vascular permeability.

Dosage and Administration Information

How Azomyr is Used: Official Administration Guidelines

Azomyr (Desloratadine) is administered strictly via the oral route, consistent across all official dosage forms, which include the 5 mg film-coated tablet, oral solution (0.5 mg/mL), and orodispersible tablets.


Standard Dosing and Frequency

Administration is generally a once-daily regimen for all approved age groups and indications. The typical dose for adults and adolescents (12+ years) is 5 mg once daily. The medication is flexible regarding intake conditions, as it may be taken without regard to meals (with or without food).

Age Group Standard Once-Daily Dose
Adults and Adolescents (12+ years) 5 mg
Children 6–11 years 2.5 mg
Children 1–5 years 1.25 mg (via oral solution/syrup)

Population-Specific Adjustments

For adults with known kidney (renal) or liver (hepatic) impairment, the regulatory guidance specifies a dose modification. The official recommendation is to initiate treatment with 5 mg every other day (every 48 hours).

Administration Protocols and Duration

Film-coated tablets must be swallowed whole with water. For the oral solution, accuracy is maintained by using a calibrated measuring device for dosing. If a dose is missed, it should be taken as soon as it is remembered, then the regular once-daily schedule should be resumed; a double dose must never be taken. The duration of use is defined by the clinical scenario: treatment can be discontinued for intermittent symptoms or continued as persistent use during prolonged exposure periods.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Azomyr


Research Evidence for Allergic Rhinitis (Hay Fever and Perennial Forms)

Clinical evaluation of Azomyr in allergic rhinitis—a condition characterized by fluctuating or episodic manifestations—has been conducted primarily through short-term, double-blind Randomized Controlled Trials (RCTs). Research examined how symptoms change over time in Adult and Adolescent populations, and to a limited extent, in children aged 6 and over. Researchers applied these studies to measure patient-reported outcomes describing perceived discomfort, such as the Total Symptom Score (TSS).

The studies focused on periods of increased symptom activity and monitored symptom measurement outcomes during defined observation intervals, typically ranging from one to four weeks. Research also reported how symptoms were monitored in the observed populations concerning quality of life measures and the interference symptoms had with daily functioning and sleep. These findings help contextualize how patients reported their experience during short-term treatment in controlled settings.

What remains uncertain is the long-term outcome of this specific research. The core regulatory trials provide limited information for long-term outcomes, and the data for the durability of the effect after the short-term study period are not fully established.


Research Evidence for Chronic Idiopathic Urticaria (Chronic Hives)

For Chronic Idiopathic Urticaria (CIU), a condition presenting with cycles of stability and flare-ups of hives, the evidence base also includes short-term Randomized Controlled Trials (RCTs). These studies were applied in research contexts involving fluctuating or unstable symptoms for Adult and Adolescent populations. The main outcomes studied were related to physical discomfort, specifically focusing on measurements of the severity and number of wheals (hives) and the intensity of itching (pruritus).

The research describes the measurements observed during these trial settings, with observation periods generally lasting two to four weeks. The studies describe how physical manifestations and patient-reported discomfort were measured in the observed populations during periods of heightened symptom activity. Findings describe patterns observed in the studies related to the measurement of wheal counts and pruritus severity over the defined, short-term research interval.


Key Limitations and Areas of Uncertainty

Research exploring use across different age groups shows patterns related to Adults and Adolescents (age 12 and over), which formed the main populations for the core short-term RCTs. However, the sample sizes were modest in some analyses for children (age 6 and over). The overall research landscape still contains gaps: comparative evidence is lacking in certain areas, particularly in direct, head-to-head trials against all similar anti-allergy medicines. Furthermore, the core evidence base only provides context for short-term changes; therefore, limited information for long-term outcomes is available.

Key Studies & References Desloratadine - Drug Information (MedlinePlus, U.S. National Library of Medicine/NIH)

Frequently Asked Questions (FAQ)

Common questions about Azomyr (FAQ)


Q: Is Azomyr the same as the generic version?

A: The active substance in Azomyr is desloratadine. Official documents confirm that generic drug products containing desloratadine are chemically identical to the brand-name formulation, meaning they contain the same active ingredient.


Q: How long does Azomyr take to start working?

A: Studies indicate that the antihistaminic effects of desloratadine can begin within one hour after it is administered. Patient reports of symptom improvement may be observed as early as the first day of starting treatment, according to regulatory information.


Q: Can Azomyr interact with pain relievers like ibuprofen?

A: Official drug interaction studies do not currently list common non-steroidal pain relievers, such as ibuprofen, as having a documented or clinically significant interaction with desloratadine. Known interactions noted in regulatory documents primarily involve certain antibiotics and antifungals.


Q: Can I take Azomyr while I'm pregnant or breastfeeding?

A: According to official drug information, the use of Azomyr is not recommended during either pregnancy or while breastfeeding. This caution is specified because there is currently insufficient data to establish its safety profile for use during these periods.


Q: Is it okay to take Azomyr right before driving?

A: While studies suggest desloratadine does not typically impair performance, individuals are advised to consider their own response before driving or operating machinery. This is because fatigue is listed as a common side effect in official safety documents, and individual responses can vary.


Q: Why is it sometimes described as a 'non-sedating' antihistamine?

A: Azomyr is chemically classified as a second-generation antihistamine. This classification indicates that the drug has a selective action and reduced ability to enter the central nervous system compared to older antihistamines. This characteristic is why it is commonly referred to as 'non-sedating'.


Q: Can I stop taking Azomyr suddenly?

A: Official documents describe treatment duration as being dependent on the symptom pattern; for example, discontinuation may occur when intermittent symptoms are resolved. Regulatory documents do not contain specific warnings about adverse effects from sudden cessation.


Q: Do people typically experience weight gain on Azomyr?

A: Weight gain is listed as a potential side effect in the official product information. However, based on the available data from clinical trials, the frequency of weight gain is officially classified as 'Not Known'.


Q: Can Azomyr cause changes in sleep patterns?

A: Sleep-related changes are noted in regulatory documents. Insomnia (difficulty sleeping) is listed as an adverse reaction. While the frequency is 'Not Known' for adults, it was reported as a common reaction in children aged 1 to 2 years.


Q: What are the potential effects of Azomyr on the heart rhythm?

A: The official safety profile documents potential effects on heart rhythm, including Tachycardia (a very rapid heart rate) and a condition called QT prolongation. These are classified as very rare or frequency not known, and are documented as part of the overall safety assessment.


Q: Does Azomyr help with asthma symptoms related to allergies?

A: The officially approved uses for Azomyr are Allergic Rhinitis and Chronic Urticaria. However, some clinical studies mentioned in official documents did include patients who had both allergic rhinitis and concurrent asthma, where symptom measurements were also reported for those populations.


Q: What makes Azomyr different from its 'parent' drug, Loratadine?

A: Azomyr (desloratadine) is described in official documents as a synthetic, biologically active metabolite of loratadine. This means that when loratadine is taken, the body converts it into desloratadine, which is the compound responsible for the anti-allergy effects.


Q: Is Azomyr the same kind of medication as Zyrtec or Allegra?

A: Azomyr belongs to the same general pharmacological class, known as second-generation antihistamines, as the active ingredients found in Zyrtec (cetirizine) and Allegra (fexofenadine). However, desloratadine is a distinct chemical compound compared to these other medicines.


Q: What is the difference between Azomyr and other allergy pills?

A: Azomyr is categorized as a selective peripheral H1-receptor antagonist. This is a functional description that means it works by specifically blocking histamine's effects outside of the brain and spinal cord, which is the defining characteristic of this type of modern anti-allergy medicine.


Q: Does Azomyr lose its effectiveness over time?

A: Clinical studies conducted over periods of up to 28 days specifically investigated this concern and reported no evidence of tachyphylaxis (a term for the loss of drug effect over time) in the observed populations.


Q: Is there a maximum length of time someone can safely use Azomyr?

A: Official documents define the duration of treatment based on the pattern of symptoms (intermittent or persistent). The product label does not specify or set a maximum safe length of time for the use of Azomyr.


Q: What did the original clinical trials for Azomyr investigate?

A: The core regulatory trials primarily measured patient-reported outcomes using symptom scoring systems, such as the Total Symptom Score for allergic rhinitis and Wheal and Pruritus Scores for chronic hives. These scores were used to measure relief over short-term observation periods.


Q: Is Azomyr safe for older adults (seniors)?

A: Dosage adjustment is generally not necessary based on age alone for adults. However, official documents emphasize that dose adjustment is required for all patients with severe renal (kidney) or hepatic (liver) impairment, conditions that can be more common in older adults.


Q: Is the active ingredient in Azomyr known to interact with antibiotics?

A: Yes, official interaction studies specifically reported that co-administration with certain antibiotics, including Erythromycin and Azithromycin, resulted in formally measured increases in the concentration of desloratadine in the blood.

How should Azomyr be stored and disposed of?

Storage and Disposal of Azomyr

Official regulatory guidelines mandate specific conditions to ensure the stability and safety of Azomyr (Desloratadine).


Storage Requirements

Azomyr must be stored at a temperature below 30 C (86 F) and kept in its original package to protect it from moisture. It is mandatory to store the medicine out of the sight and reach of children.

Disposal Instructions

Unused or expired Azomyr must not be disposed of via household waste or wastewater to prevent environmental contamination. The official instruction is to return any unused medicine to a pharmacy or an approved pharmaceutical waste disposal system, according to local requirements.

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

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