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Xyzal-M

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Xyzal-M

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Treatment option:

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.

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Overview of Xyzal-M

Xyzal-M is a prescription medicine formulated as a synthetic, fixed-dose combination (FDC) product, designed for oral administration. It is classified as a dual-mechanism respiratory therapeutic within the broader categories of anti-allergic agents and anti-asthmatic agents.

Property Description
Active Ingredients Levocetirizine, Montelukast
Form Film-coated tablets
Pharmacological Class Second-generation Antihistamine and Leukotriene Receptor Antagonist (LTRA)
Type Fixed-dose Combination (FDC)
Route of Administration Oral

Key Components: Levocetirizine and Montelukast

This medicine's identity hinges on its FDC design, which concurrently delivers two distinct pharmacological agents through a single oral film-coated tablet. The active ingredients are Levocetirizine Dihydrochloride and Montelukast Sodium.

Levocetirizine is a second-generation antihistamine that targets immediate allergic symptoms by histamine blockade. Montelukast is an orally active leukotriene receptor antagonist (LTRA) that prevents the binding of pro-inflammatory leukotrienes.

Concurrent administration of these two classes of agents offers a recognized approach for patients with persistent allergic symptoms compared to monotherapy.

General Purpose of the Medication

The general purpose of Xyzal-M is to provide continuous maintenance management for chronic respiratory and allergic conditions, such as persistent nasal issues and co-occurring lower airway inflammation. By engaging both mechanisms—blocking histamine and antagonizing leukotrienes—the medication achieves a synergistic effect intended to provide better overall stability and patient control over the persistent allergic state.

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What side effects are possible with Xyzal-M?

Possible Side Effects and Safety Information

The safety profile of this fixed-dose combination, containing Levocetirizine and Montelukast, is characterized by adverse reactions documented in official regulatory documents and classified by frequency and System-Organ Class (SOC).

Commonly Documented Adverse Reactions

The most frequently reported adverse reactions, classified as Common (affecting ge 1% to < 10% of patients), typically involve the Nervous System and Gastrointestinal systems. These may include somnolence (drowsiness), fatigue, headache, dry mouth, nasopharyngitis, and abdominal pain.

Serious Adverse Reactions

Official labeling documents highlight the potential for serious, though generally rare, adverse reactions. These include clinically significant Neuropsychiatric Events, such as agitation, aggression, depression, insomnia, and suicidal ideation and behavior, which are primarily associated with the Montelukast component. Severe hypersensitivity reactions, including anaphylaxis and angioedema, are also documented. In very rare instances, systemic eosinophilia, sometimes presenting as vasculitis consistent with Churg-Strauss syndrome, has been noted. Urinary retention is another documented serious adverse effect.

Safety Considerations for Specific Populations

Official restrictions apply to certain populations. This medication is contraindicated in patients with End-Stage Renal Disease (ESRD), defined as a creatinine clearance (CLCR) less than 10 mL/min. Dosage adjustments are required for patients with less severe renal impairment. Older adults and patients with conditions predisposing to urinary retention should also be considered a higher-risk group for certain adverse effects. Additionally, severe generalized pruritus (itching) has been reported upon discontinuation of long-term daily use of the antihistamine component.

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Overdose and Emergency Response

The official regulatory profile for this fixed-dose combination product is constructed from the known effects of its individual components, as specific overdose data for the combination is limited. Documented manifestations reported in overdosage may include non-specific symptoms such as abdominal pain, headache, vomiting, thirst, and sleepiness (somnolence). A more severe manifestation documented in the component profile is psychomotor hyperactivity.

The presentation of overdose differs by age: adults typically experience drowsiness, while children may exhibit initial agitation and restlessness before the onset of sleepiness.

Immediate medical attention must be sought for any suspected overdose, as treatment is strictly symptomatic and supportive. There is no known specific antidote for the levocetirizine component. Management procedures may include standard measures to remove any unabsorbed drug, such as considering gastric lavage shortly after ingestion. Dialysis is noted in regulatory sources as being ineffective for the removal of levocetirizine from the body.

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Therapeutic Uses of Xyzal-M

What Xyzal-M Treats: Main Uses and Benefits

This medication is commonly used in situations involving certain distressing symptoms of allergic disease, and may be part of symptomatic management for combined respiratory and skin manifestations. The use of this combination therapy is considered relevant for the symptomatic treatment of conditions like Allergic Rhinitis and Chronic Idiopathic Urticaria. The medication contributes to easing the overall symptom load in these conditions.

It is relevant in conditions characterized by periods of heightened symptoms and is applied across domains where symptomatic support is needed. This includes addressing symptom clusters that may become intense or disruptive, such as excessive sneezing, persistent runny nose, nasal and ocular itching, and the appearance of skin welts and itching (pruritus).

“The intent of this supportive management may be to contribute to easing the functional strain symptoms can place on overall well-being and daily stability.”

This supports patients during difficult episodes by easing distress and assists with maintaining functional stability when symptoms interfere with routine activities. It is relevant when supportive symptom management is appropriate for airway irritation associated with allergic triggers.


Quick Fact: Relief for Combined Allergic Symptoms

Xyzal-M is commonly used to help manage symptoms that affect both the nose and eyes and the skin, supporting patients during episodes of heightened discomfort.

Regulatory References

  1. FDA Philippines Product Information
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Eligibility and Restrictions for Use

Who can and cannot use Xyzal-M?

The eligibility for Xyzal-M (Levocetirizine/Montelukast FDC) is strictly defined by government regulatory labeling, focusing on populations where use is prohibited or restricted.


Contraindicated Populations (Must Not Use)

Category Non-Eligibility Condition
Hypersensitivity Known allergy to Montelukast, Levocetirizine, Cetirizine, or any excipients.
Renal Function Severe renal impairment (creatinine clearance < 10 mL/min) or patients undergoing hemodialysis.
Metabolic Certain rare hereditary problems, such as Lapp lactase deficiency or galactose intolerance.

Population Restrictions and Cautions

Age Thresholds: The FDC tablet formulation is primarily authorized for adults and older adolescents (typically 15 or 18 years of age). Use is not recommended in younger children, particularly those under 6 years, as the tablet does not permit appropriate dose adaptation.

Physiological States: Use is not recommended for pregnant women or women who are breastfeeding/lactating due to limited or absent controlled data for the combination.

Organ Function: Patients with moderate renal impairment must use the medicine with caution and may require specific medical consideration. Patients with mild to moderate hepatic impairment require no specific dose adjustment.

Comorbidities: Caution is required in patients with predisposing factors for urinary retention or a history of epilepsy or convulsions.

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What should I know about interactions with other medicines?

Interactions with other medicines and products

Regulatory documentation defines the interaction profile of Xyzal-M based on the established patterns for its two active components, Levocetirizine and Montelukast.

Pharmacokinetic and Exposure Modification

The interaction structure is partly defined by hepatic metabolic induction involving CYP enzymes 3 A4, 2 C8, and 2 C9. Specific enzyme inducers such as Rifampin and Phenobarbital are documented to substantially decrease the plasma exposure (AUC) of the Montelukast component. Conversely, co-administration with the antiviral agent Ritonavir is associated with an increased plasma exposure (AUC) and reduced clearance of the Levocetirizine component, as noted in studies of its parent drug, Cetirizine.

Pharmacodynamic and Administration Constraints

A key restriction is the additive pharmacodynamic reinforcement risk. The use of the Levocetirizine component with alcohol or other Central Nervous System (CNS) depressants is formally discouraged due to the documented potential for additional impairment of central nervous system performance. Furthermore, patients with known aspirin sensitivity are advised to continue to avoid NSAIDs while taking this medication. The official label notes that the oral bioavailability of Montelukast is not influenced by a standard meal.

Population-Specific Notes

The regulatory profile identifies that the clearance of the Levocetirizine component is reduced in individuals with renal impairment due to its primary excretion pathway.

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Mechanism of Action

Targeted Inhibition of Immediate Allergic Signaling

This mechanism is primarily driven by Levocetirizine, a molecule that acts as a highly selective antagonist of the peripheral Histamine H1 receptors ( H1 R). By blocking H1 R on effector cells, the drug functionally prevents the binding of histamine, thereby interrupting the early molecular cascade that leads to increased vascular permeability and nerve stimulation. This action contributes to the regulation of fluid extravasation and tissue edema by limiting capillary permeability.


Modulation of Chronic Inflammatory Cascades

The second primary mechanism involves Montelukast, a highly selective antagonist of the Cysteinyl Leukotriene Receptor Type 1 ( CysLT1 receptor). Leukotrienes are potent inflammatory mediators, and by blocking their binding, Montelukast suppresses their downstream physiological effects, which include airway smooth muscle contraction and the recruitment of inflammatory cells. This action modulates the consequences of dysregulated leukotriene activity on the respiratory system and other tissues by maintaining inhibition of the CysLT1 receptor.


Mechanistic Synergy and Dual-Pathway Control

The fixed combination involves dual-pathway inhibition, simultaneously engaging two distinct biological mechanisms— H1 antagonism and CysLT1 antagonism. This coordinated approach achieves a more extensive scope of mechanistic interference than either independent mechanism. The drug modifies early molecular steps that shape both the immediate and sustained systemic physiological outcomes, resulting in a downregulation of signaling in the targeted pathways.

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Dosage and Administration Information

How to Use Xyzal-M

This section outlines the general principles of administration and dosing for the Montelukast 10 mg / Levocetirizine 5 mg fixed-dose combination product.


Administration Protocol

The medicine is designed for oral intake. The standard administration pattern involves taking the tablet once daily. Administration typically occurs in the evening to align with the intended chronopharmacological effect of the components.

The film-coated tablet should be swallowed whole and can be taken with or without food.

Feature General Guideline
Route of Administration Oral
Dosing Schedule One tablet (10 mg/5 mg) once daily.
Timing in relation to meals May be taken with or without food.

Population-Specific Use and Adjustments

The standard strength tablet is generally intended for adults and adolescents aged 15 years and older. This formulation is not suitable for pediatric patients under this age as it does not allow for appropriate dose adjustment. The product is primarily used for maintenance management as part of a longer-term treatment plan.

In cases where a dose is missed, the standard approach is to skip the missed dose and take the next dose at the usual time; a double dose should not be taken to compensate.

Administration for patients with renal impairment requires special consideration and dose modification due to the elimination pathway of Levocetirizine; the product is explicitly contraindicated in patients with End-Stage Renal Disease (creatinine clearance < 10 mL/min).

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Recent Clinical Evidence

Xyzal-M: Recent Clinical Evidence

Combination Therapy Findings

Research has explored the clinical potential of the fixed-dose combination of levocetirizine (an antihistamine) and montelukast (a leukotriene antagonist) in treating allergic conditions. A primary focus of studies has been the management of perennial allergic rhinitis (PAR), particularly in patients who also have mild to moderate asthma.

A Phase 3, double-blind, randomized trial evaluated the fixed-dose combination against montelukast monotherapy. In this study, the combination demonstrated a significant reduction in mean daytime nasal symptom scores when compared to montelukast alone. The combination also showed greater improvements across other allergic rhinitis endpoints.

Tolerability and Comparative Assessment

Studies that assessed the combination generally reported a tolerability profile similar to that of montelukast alone. The most frequently observed adverse events included mild headache, dry mouth, nausea, and somnolence (drowsiness).

  • Chronic Urticaria: In trials involving chronic urticaria patients who did not fully respond to standard antihistamine doses, the addition of montelukast to a single dose of levocetirizine was assessed. The results for symptom reduction were found to be comparable between the levocetirizine/montelukast combination and a doubled dose of levocetirizine alone.
  • Safety Monitoring: Post-marketing surveillance studies have been conducted to monitor the combination's safety and effectiveness in broader patient populations following initial approvals.

Consultation with a healthcare provider is advised to discuss the findings and their personal relevance.

Key Studies & References

  1. MONTELUKAST (as Sodium) + LEVOCETIRIZINE Hydrochloride - Product Information (Regulatory Document Example)
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Frequently Asked Questions (FAQ)

Common questions about Xyzal-M (FAQ)


Q: Is it necessary to take Xyzal-M every day?

Official regulatory documents indicate that Xyzal-M is intended for maintenance management of allergic conditions. For this reason, the labeling aligns with once-daily use as part of an ongoing treatment plan.


Q: What are the most commonly reported side effects of Xyzal-M?

According to official product information, the most common adverse reactions reported in clinical trials have included feelings of sleepiness (somnolence), fatigue, dry mouth, and inflammation of the throat or nose (pharyngitis and nasopharyngitis). These common findings are summarized from clinical trial data, with further details available in the official product information.


Q: Is it common to feel a dry mouth while using Xyzal-M?

Yes, dry mouth has been reported as one of the common adverse reactions in clinical trials involving the levocetirizine component of this medication. This effect is consistent with the known action of the antihistamine component.


Q: Why does Xyzal-M sometimes make people feel drowsy?

The levocetirizine component of Xyzal-M is an antihistamine, a class of medicine known to sometimes cause central nervous system effects. Official documents show that this component has been associated with effects such as somnolence (drowsiness) and fatigue in some individuals.


Q: Can Xyzal-M be crushed or split?

Regulatory guidelines state that the film-coated tablet should be swallowed whole. The official prescribing information does not generally detail altering the tablet by crushing or splitting.


Q: What is the main purpose of the leukotriene receptor antagonist component in Xyzal-M?

The leukotriene receptor antagonist component (montelukast) works by blocking inflammatory chemicals called cysteinyl leukotrienes. These substances are involved in the development of allergy and asthma symptoms, helping to control the inflammatory response.


Q: Why are there two different active ingredients in Xyzal-M?

Xyzal-M is formulated as a combination of two active ingredients to target two distinct biological pathways involved in allergic conditions. The combination is designed to target both the immediate symptoms of allergy via the antihistamine and the chronic inflammatory processes via the leukotriene receptor antagonist.


Q: What is Xyzal-M actually used for?

The product is indicated for treating symptoms associated with certain allergic conditions. Official documents state its use for managing symptoms of both seasonal and perennial (all-year-round) allergic rhinitis (e.g., runny nose, sneezing) and for treating chronic idiopathic urticaria (hives).


Q: How is Xyzal-M different from other allergy pills?

Many standard allergy pills contain only one type of medicine, such as an antihistamine. Xyzal-M is a fixed-dose combination product that contains two different types: an antihistamine and a leukotriene receptor antagonist, which target separate mechanisms.


Q: How long does it usually take for Xyzal-M to start working?

Official studies indicate that the H1-receptor blocking action of the antihistamine component (levocetirizine) can begin within one hour of taking a single dose.


Q: Is Xyzal-M a type of steroid?

No, Xyzal-M is not a steroid. The active ingredients are levocetirizine, which is classified as an antihistamine, and montelukast, which is classified as a leukotriene receptor antagonist. The medication works through mechanisms different from those of steroids.


Q: Is there any research about Xyzal-M's long-term use?

Regulatory documents refer to clinical studies conducted on the components of Xyzal-M, including some trials that examined use for periods up to one year. These studies help inform the product’s use in chronic conditions like persistent allergic rhinitis.


Q: Is Xyzal-M available without a prescription?

The fixed-dose combination product containing both active ingredients is generally classified as a prescription medication in most regulatory jurisdictions. Dispensing typically requires a prescription from a healthcare provider.


Q: Can Xyzal-M cause mood changes or anxiety?

Official safety information for the montelukast component warns that it has been associated with neuropsychiatric events in some patients. These events can include feelings of agitation, anxiety, depression, and, rarely, more serious changes in behavior or mood. The official product information instructs patients to watch for any behavioral or mood changes.


Q: Does Xyzal-M help with sinus congestion?

The product is indicated for the symptoms of allergic rhinitis, and its dual-component mechanism works to reduce inflammation in the nasal passages. Since the product is indicated for allergic rhinitis, its dual components work to address the underlying inflammation in the nasal passages that contributes to congestion.


Q: Can Xyzal-M be used for sudden allergic reactions?

Regulatory labeling states that this product is intended for the maintenance management of chronic conditions. It is not indicated for treating sudden, severe allergic reactions (such as anaphylaxis) or acute breathing problems.


Q: Is Xyzal-M considered safe for pregnant individuals?

There is limited data available on the use of the combination during pregnancy. Use during pregnancy is a factor that requires careful evaluation, and the decision is typically made in a clinical setting.


Q: Does Xyzal-M cause weight gain?

Weight gain is not typically listed among the common adverse reactions reported in the primary regulatory prescribing information for the product's components.


Q: Is Xyzal-M for seasonal allergies or all-year-round allergies?

Regulatory documents state that Xyzal-M is indicated for symptoms of both Seasonal Allergic Rhinitis (SAR) and Perennial Allergic Rhinitis (PAR). Therefore, it is used for both time-limited and all-year-round allergy symptoms.


Q: What should a patient do if they experience a severe reaction to Xyzal-M?

Regulatory safety information describes that symptoms like swelling of the face, tongue, or throat, or severe breathing difficulties, are signs for which emergency medical attention is necessary.


Q: Is Xyzal-M an antihistamine, or something else?

It is both. Xyzal-M is a combination medicine that contains an antihistamine (levocetirizine) to block immediate allergy symptoms and a leukotriene receptor antagonist (montelukast) to manage chronic allergic inflammation.


Q: How long do the effects of Xyzal-M last?

The product is designed to be dosed once daily, which reflects the duration of action expected from the active components. This allows the medicine to provide relief throughout a 24-hour period.


Q: Can Xyzal-M affect sleep quality?

Sleep-related issues have been reported in the official adverse event information for the components of Xyzal-M. These reports cite experiences such as increased somnolence (drowsiness), insomnia, nightmares, and, rarely, sleepwalking.


Q: Can Xyzal-M cause problems with the stomach or digestion?

Yes, some gastrointestinal issues have been reported in clinical trials. These adverse events include common complaints such as dry mouth, stomach pain, diarrhea, and upset stomach.


Q: Is it OK to take Xyzal-M for a short time only?

The product is officially indicated for the maintenance management of chronic allergic conditions, which aligns with ongoing use rather than short-term or occasional symptom relief.


Q: Does Xyzal-M work differently than Singulair?

Yes, they are different. Singulair contains only the leukotriene receptor antagonist component (montelukast). Xyzal-M contains both montelukast and the antihistamine component (levocetirizine).


Q: Are there different strengths of Xyzal-M available?

The most common fixed-dose combination available is the montelukast 10 mg / levocetirizine 5 mg tablet. While this specific combination strength is detailed, official product information for individual components or related products may describe different strengths in specific regions.


Q: Can Xyzal-M affect the results of allergy skin tests?

Yes. The levocetirizine component is an antihistamine that can interfere with the results of skin tests by suppressing the reaction. The official product labeling for the antihistamine component advises that its use may need to be stopped several days before allergy skin testing.


Q: Is Xyzal-M considered a first-generation or second-generation drug?

The antihistamine component, levocetirizine, is classified as a second-generation antihistamine. These are typically associated with a lower incidence of drowsiness compared to older, first-generation medicines.


Q: Are there any specific safety classification warnings for Xyzal-M?

Yes. The montelukast component carries warnings regarding the potential for serious neuropsychiatric events. In certain regions, the product features a prominent regulatory warning (like a Boxed Warning) advising caution.


Q: Can Xyzal-M interact with medication for depression or anxiety?

The leukotriene receptor antagonist component (montelukast) has been associated with neuropsychiatric events. Furthermore, the official label notes the potential for additive effects with other Central Nervous System (CNS) depressants, which may include certain medications for depression or anxiety.


Q: Are there any known issues with taking Xyzal-M and driving?

Official product warnings caution that due to the potential for somnolence (drowsiness) and other CNS effects, the medication may affect a person's ability to safely operate a motor vehicle or machinery. Patients are advised to know how the medicine affects them before engaging in such activities.


Q: Does Xyzal-M help with allergic asthma symptoms?

The leukotriene receptor antagonist component (montelukast) is approved for the maintenance treatment of asthma. However, the combination product (Xyzal-M) is primarily indicated by regulatory bodies for allergic rhinitis and chronic idiopathic urticaria.


Q: How is Xyzal-M regulated by health authorities?

Xyzal-M is regulated by government health authorities (such as the FDA or EMA) as a prescription medication. These agencies review and approve the medicine based on established safety, efficacy, and quality standards before it can be made available to the public.

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How should Xyzal-M be stored and disposed of?

Storage and Disposal of Xyzal-M

Storage Environment

Xyzal-M must be stored at Controlled Room Temperature, specifically maintained between 20 C and 25 C (68 F and 77 F). The medication requires protection from both moisture and light to maintain its stability and integrity. The tablets must be kept in their original package and should not be used if the container's safety seal or inner foil is found to be torn or missing.

Child Safety

Consistent with regulatory requirements, Xyzal-M must always be stored out of the sight and reach of children.

Disposal Requirements

Do not dispose of unused or expired Xyzal-M by flushing it down a toilet or throwing it into routine household waste or wastewater. For proper disposal, it is necessary to consult a pharmacist or use an authorized drug take-back program available in the community.

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

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