Alaspan

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Medically reviewed

Laura Arias

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Alaspan

The pharmaceutical product Alaspan is a medicine used for the symptomatic relief of allergic conditions, formally classified as a second-generation antihistamine. Its core function is to intervene in the biological process that releases the chemical mediator, histamine. The drug is clinically recognized for its long-acting and non-sedating profile.

Property Description
Active ingredient Loratadine
Form Tablet, Syrup, Suspension
Pharmacological class H1-receptor antagonist
Common use Allergic conditions
Origin Synthetic organic compound

Defining Alaspan: Classification and Core Identity

Alaspan is defined by its active ingredient, Loratadine, a potent, long-acting, and selective H1-receptor antagonist. It is officially grouped within the antiallergic pharmacological class and recognized as a non-sedating agent. This specialized classification confirms that Loratadine operates by targeting specific receptors outside the central nervous system, making it suitable for routine management of allergy manifestations.

Loratadine is a synthetic organic compound, which is characterized by its specific chemical structure as a tricyclic derivative. This selective antagonistic action is central to its identity as a second-generation antihistamine, positioning it as a highly specific tool for controlling the body's unwanted reaction to common allergens, such as seasonal pollen exposure.


Composition, Origin, and Available Forms

The composition of Alaspan centers on the Loratadine molecule, which the body further metabolizes into its active compound, Desloratadine. Alaspan is primarily manufactured as a single-ingredient medicine, though the active molecule is also found in combination formulations, such as Alaspan AM, which integrates a nasal decongestant. The over-the-counter (OTC) status in many regions underscores its established safety profile.

For the oral route of administration, Alaspan is readily available in several essential dosage forms. These typically include the standard tablet form and liquid formats, such as a syrup or suspension, ensuring flexible delivery across patient groups, including children. The syrup, often available with a specific flavor profile, represents a distinct feature designed for improved pediatric compliance.


General Therapeutic Role and Mechanism Principle

The general therapeutic role of Alaspan stems directly from its function as a selective peripheral H1-receptor antagonist. This action provides the general benefit of the medicine by directly interrupting the effects of histamine, which is released by the immune system in response to an allergen. By chemically blocking these H1 receptors, Loratadine prevents the physiological response that leads to allergic symptoms. This targeted principle enables the drug to deliver effective symptomatic relief for the physical signs of allergy, such as irritation and inflammation, without the pronounced depressant effects on the nervous system associated with earlier antihistamines.

Regulatory References

  1. Loratadine: MedlinePlus Drug Information
  2. Loratadine - DailyMed (NIH)

What side effects are possible with Alaspan?

The official safety profile for Alaspan (Loratadine) is standardized across regulatory documents, classifying possible side effects by how frequently they are reported and which body system they affect.

Frequency-Classified Adverse Reactions

Adverse reactions are formally grouped into categories based on reporting frequency in adults and adolescents. Common effects, reported in more than 1 in 100 people, include Headache, Somnolence (drowsiness), Insomnia, and Increased Appetite. For children aged 2 to 12 years, the most common reported effects are Headache, Nervousness, and Fatigue. Effects such as Tachycardia, Convulsion, Abnormal hepatic function, and Hypersensitivity reactions (including Angioedema and Anaphylaxis) are classified as Very Rare.


System-Organ-Class and Serious Reactions

Adverse reactions are organized by System-Organ Class (SOC), including Nervous System Disorders (e.g., dizziness, convulsion), Cardiac Disorders (e.g., palpitation), Gastrointestinal Disorders (e.g., dry mouth, nausea), and Hepato-biliary Disorders. Serious adverse reactions, though very rare, specifically include severe Hypersensitivity reactions and documented cases of Abnormal hepatic function.


Safety Considerations and Restrictions

Population-Specific Safety: Safety has not been established in children younger than 2 years of age. Caution is advised for individuals with Severe Hepatic Impairment as the drug’s clearance may be reduced. Use is not recommended during breast-feeding. Additionally, some formulations contain phenylalanine (as aspartame), requiring caution for individuals with Phenylketonuria (PKU).

Restrictions: The medicine should be discontinued for approximately 48 hours prior to allergy skin testing, as it may interfere with the test results. Although classified as non-sedating, the label notes that very rarely, reduced alertness may occur.

Overdose and Emergency Response

The official regulatory documentation for Alaspan (Loratadine) details specific manifestations and required emergency actions in the event that too much medicine is taken. The most commonly documented clinical presentations of an overdose include somnolence (drowsiness), tachycardia (rapid heartbeat), and headache, alongside the potential for increased anticholinergic symptoms.

When to Seek Immediate Help

If overdosage occurs, individuals must immediately seek medical help or contact a Poison Control Center right away, or contact the nearest casualty department at once, as explicitly mandated by government health authorities. Overdose may present with increased severity of somnolence particularly in patients with pre-existing hepatic impairment, renal impairment, or the elderly.

Overdose Management and Monitoring

Management of Alaspan overdose involves the institution of general symptomatic and supportive measures. Procedural steps such as gastric lavage or the administration of activated charcoal as a slurry with water may be considered by healthcare professionals. It is officially stated that no specific antidote is known for Loratadine. Due to this, and the fact that the substance is not removed by haemodialysis, continued medical monitoring of the patient is required following initial emergency treatment to manage the documented clinical signs.

Therapeutic Uses of Alaspan

What Alaspan Treats: Main Uses and Benefits

Alaspan is commonly used in cases where additional symptomatic support is needed for allergic rhinitis (hay fever) and chronic idiopathic urticaria (hives). This medication is used for symptomatic management, supporting patients during episodes of heightened discomfort.

It helps address symptom clusters that may appear suddenly or fluctuate, such as repetitive sneezing, runny nose, itchy nose, and the related ocular manifestations of watering eyes and irritation. For the skin, it is relevant for managing symptoms that create noticeable functional strain, including pervasive itching, rash, and localized swelling.

This supportive therapy is often used during phases when symptoms become more noticeable and is generally applicable across relevant age groups. As a patient-centered benefit, this treatment supports individuals during episodes of discomfort by easing distress, which may assist with maintaining functional stability and alertness throughout the 24-hour day.


Quick Fact: Relief for Itching and Nasal Symptoms

Alaspan is applied in settings that involve acute or unstable symptom patterns, supporting comfort and easing the burden of inflammatory or irritative states affecting the skin and upper airways.

Regulatory References

  1. NIH MedlinePlus Drug Information

Eligibility and Restrictions for Use

Who Can and Cannot Use Alaspan?

The population eligibility for Alaspan (Loratadine) is defined by official regulatory documentation, which outlines approved age groups, contraindications, and restrictions based on physiological status.


Age-Based and Absolute Contraindications

Classification Official Regulatory Status
Approved Use Adults and children 6 years of age and older (for tablets/capsules) and children 2 years of age and older (for liquid formulations).
Use Not Established Children younger than 2 years of age; safety and efficacy have not been formally established.
Contraindicated Patients with known hypersensitivity to Loratadine, its active metabolite, or any of the product's excipients.

Condition-Based Restrictions

Restricted Use is required for patients with certain clinical states, necessitating specialized consideration:

  • Severe Organ Impairment: Patients with severe liver impairment or severe renal insufficiency (glomerular filtration rate < 30 mL/min) are recommended a lower initial dose, such as every other day.
  • Pregnancy: Use is preferably avoided as a precautionary measure, although official data indicates no malformative toxicity.
  • Lactation: Use is not recommended in breast-feeding women because Loratadine is excreted into breast milk.
  • Comorbidities: Formulations containing lactose are contraindicated for patients with rare hereditary problems like galactose intolerance. Formulations containing aspartame are restricted for patients with Phenylketonuria (PKU).

Regulatory documents define eligibility through these specific exclusions and conditional use statements, which must be observed before initiating use.

What should I know about interactions with other medicines?

The official regulatory profile for Alaspan (Loratadine) centers on pharmacokinetic interactions with documented inhibitors of metabolic enzymes. The specific medicines listed that interact include Ketoconazole, Erythromycin, and Cimetidine. Co-administration with these agents, which inhibit CYP3A4 and/or CYP2D6, results in a substantial increase in the plasma concentrations (AUC) of loratadine and its active metabolite. This pharmacokinetic outcome is officially associated with a potential for an increase in adverse events due to the resulting elevated systemic exposure. No combination of these medicinal products is formally classified as contraindicated due to an interaction risk in the regulatory labels.

The regulatory documents also define constraints concerning substance use. The ingestion of food is documented to increase the overall AUC of loratadine by approximately 48% and to delay the time required to reach its peak plasma concentration. Conversely, a key pharmacodynamic finding is that Alaspan administered with alcohol is officially reported to have no potentiating effects on psychomotor function in controlled studies. Furthermore, the official profile includes population-specific cautions: patients with severe hepatic impairment or chronic renal impairment may exhibit documented reduced clearance of loratadine.

Mechanism of Action

Alaspan (Loratadine) is a selective compound that primarily acts by modulating key signaling pathways associated with heightened physiological responses. It engages selective mechanisms to regulate these dysregulated processes at a molecular level.


Peripheral Histamine H1-Receptor Antagonism

This mechanistic domain involves the drug's core action as a selective inverse agonist of peripheral histamine H1-receptors. By binding to and stabilizing the inactive state of this receptor, Alaspan blocks the ability of the inflammatory mediator histamine to activate it. This alters signal transduction associated with histamine binding, influencing localized membrane permeability and sensory signaling.


Modulation of Inflammatory Signaling Cascades

Alaspan also acts within domains that influence cellular and systemic inflammatory processes, independent of its primary anti-histamine activity. This involves mechanisms that can influence the NF-κB pathway activity and modify the release profile of specific cytokines and chemokines. This action modulates processes driven by distinct inflammatory signaling patterns and influences the activity of specific mediators within targeted pathways.

Dosage and Administration Information

How to use Alaspan

Alaspan (loratadine) is administered via the oral route across its various forms, including standard tablets, liquid solutions, and orally disintegrating tablets. This medication is intended for once-daily intake, utilizing its long-acting pharmacological profile to provide coverage over a 24-hour interval.

Official Dosing Regimens

The standard dose is stratified by age group and is not to exceed the specified daily limit.

Population Standard Daily Dose Maximum Frequency
Adults and Children 6 years and older 10 mg Once daily
Children 2 to 5 years 5 mg Once daily

Administration Conditions and Adjustments

The drug may be taken with or without food. Proper use involves adherence to form-specific handling: liquid forms are measured using a designated dosing device, and orally disintegrating tablets are placed directly on the tongue to dissolve.

An adjustment is indicated for individuals with severe hepatic or renal impairment (kidney or liver disease). In these instances, the initial dosing interval for the 10 mg dose is extended to every other day, a measure to account for potentially reduced drug clearance. If a dose is missed, it should be taken as soon as possible; however, if it is nearly time for the next scheduled dose, the missed dose is skipped to avoid doubling the amount.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Alaspan


Evidence for Use in Allergic Rhinitis (Hay Fever)

Research for Alaspan (loratadine) has primarily studied it in the context of allergic rhinitis, a condition characterized by fluctuating or episodic manifestations like sneezing, a runny nose, and itchy, watery eyes. Randomized Controlled Trials (RCTs) have been the main type of study conducted, comparing loratadine against a placebo (an inactive substance) and sometimes against other treatments in use. These studies explored research contexts involving fluctuating or unstable symptoms and enrolled both adults and children (typically aged 6 and older).

The studies monitored patient outcomes by using standardized Total Nasal Symptom Scores (TNSS) and Total Ocular Symptom Scores (TOSS). Studies report changes measured in symptom scores across short- to medium-term periods, commonly lasting 2 to 6 weeks. Specialized research settings were used to explore the onset of action (the time until initial measured symptom patterns were noted).


Evidence for Use in Chronic Idiopathic Urticaria (Hives)

The research examined Alaspan in the context of chronic idiopathic urticaria (CIU), a condition presenting with cycles of stability and flare-ups, typically involving persistent itching and hives (wheals) lasting more than six weeks. This research has primarily consisted of Randomized Controlled Trials (RCTs) and Systematic Reviews which provide consolidation of data from multiple individual trials.

In these trials, researchers examined standardized scales like the Urticaria Activity Score (UAS), which combines measurements of wheal size and the severity of itching (pruritus). Research reports how symptoms evolved in the observed populations across short-term periods, often lasting four to six weeks. The evidence explored patient-reported outcomes describing perceived discomfort and the impact of the condition on daily functioning.


What is Still Uncertain About Alaspan Research

While a substantial research base exists, evidence highlights what is known and what is still uncertain about Alaspan. One area of uncertainty relates to the onset of action, where different studies report varying times until initial symptom relief is observed. Additionally, although the evidence quality varies across studies, there is generally a lack of high-quality, long-term, direct comparative evidence against all of the newest second-generation antihistamines now available on the market. For certain groups, such as children under the age of 6, data are still emerging, and subgroup findings are uncertain.

Key Studies & References

  1. Efficacy and safety of loratadine suspension in the treatment of children with allergic rhinitis

Frequently Asked Questions (FAQ)

Common questions about Alaspan (FAQ)


Q: Do I need a prescription to get Alaspan?

In many countries, Alaspan (loratadine) is designated as an over-the-counter (OTC) medicine. This classification means it is widely available for purchase without a prescription. However, its exact status may depend on local regulations and the specific formulation or strength being considered.


Q: Is Alaspan the same thing as Claritin or Zyrtec?

Alaspan contains the active ingredient loratadine, which is the same active compound found in the commonly known brand-name medicine, Claritin. Both are classified as second-generation antihistamines. The medicine Zyrtec contains a different but similar active ingredient, cetirizine.


Q: How quickly should I expect Alaspan to start working?

Studies examining the onset of action report that an antihistaminic effect typically begins within one to three hours after taking a single dose. Official information indicates the measured effect usually reaches its maximum effectiveness between 8 and 12 hours after administration.


Q: Can Alaspan make me feel sleepy or drowsy?

While Alaspan is officially classified as a non-sedating antihistamine, regulatory documents list Somnolence (drowsiness or sleepiness) as a common adverse reaction in adults and adolescents. The official product information notes that caution is advised before engaging in tasks requiring mental alertness.


Q: Is it true that Alaspan can cause weight gain?

Regulatory documents list Increased Appetite as a common side effect reported by some individuals, including adults and adolescents. Weight gain itself is not typically listed as a primary adverse reaction category in the official product information.


Q: What is the difference between Alaspan and its generic version?

The generic version of Alaspan is required by regulatory bodies to contain the exact same active ingredient, strength, and dosage form. Generic medicines must also demonstrate bioequivalence, meaning they are required to perform the same way in the body as the original brand-name drug.


Q: Is it safe to drive or operate machinery after taking Alaspan?

The official safety profile notes that, very rarely, reduced alertness may occur. Regulatory documents advise caution regarding tasks that require complete mental alertness, such as driving or operating machinery, due to the rare possibility of this effect.


Q: Does Alaspan interact with common heartburn medications like antacids?

The official drug interaction profile primarily lists specific medicines that inhibit metabolic enzymes. There is generally no specific interaction or warning listed in regulatory documents for co-administration with non-absorbable antacid products commonly used for heartburn.


Q: Can Alaspan be taken with pain relievers like ibuprofen or acetaminophen?

Official guidance and patient information state that no specific interactions have been reported between Alaspan (loratadine) and common non-prescription pain relievers such as ibuprofen or acetaminophen.


Q: Can Alaspan be used for pet allergies?

Alaspan is approved for the relief of symptoms caused by perennial (year-round) allergens, which often include triggers like dust mites, molds, and animal dander. Its approved use is for treating the symptoms of allergic rhinitis, regardless of the specific perennial trigger.


Q: If I stop taking Alaspan, will my symptoms come back immediately?

The active compound and its active metabolite have relatively long elimination half-lives. Symptoms are typically expected to return over time as the amount of medicine in the body decreases and the underlying allergic response resumes, rather than returning immediately.


Q: Is Alaspan available in a liquid or chewable form?

Alaspan (loratadine) is available for oral administration in several dosage forms, including a liquid (syrup or solution), standard tablets, and orally disintegrating or chewable tablets. These various forms are designed to offer flexibility for different patient groups.


Q: Does Alaspan help with asthma symptoms?

Regulatory documents define the medicine's approved use for symptomatic relief of allergic rhinitis (hay fever) and chronic idiopathic urticaria (hives). It is not officially indicated for the treatment of asthma symptoms.


Q: Does Alaspan have a cumulative effect in the body?

Pharmacokinetic studies indicate that the drug's absorption and clearance are not significantly altered by the duration of treatment. This indicates that the drug’s elimination from the body remains consistent and that continued use does not typically lead to the progressive accumulation of excessive levels.


Q: Are there different strengths of Alaspan available?

Alaspan is manufactured in different strengths, which are defined in the official documents for use in specific age groups. These defined strengths include 10 mg and 5 mg forms.


Q: Does Alaspan help with sinus congestion?

The medicine is officially approved to relieve the core symptoms of allergic rhinitis, such as sneezing, runny nose, and itchy eyes. The active ingredient is sometimes found combined with a nasal decongestant in other formulas to specifically address sinus congestion.


Q: What is the duration of action for Alaspan once it's taken?

Studies have shown that a single dose of Alaspan provides an antihistaminic effect that lasts for more than 24 hours. This established duration of action is the basis for its once-daily administration schedule.


How should Alaspan be stored and disposed of?

How to Store and Dispose of Alaspan (Loratadine)

Official regulatory guidelines dictate specific environmental and handling conditions to maintain the stability of Alaspan.

Storage Requirements

Condition Requirement
Temperature Store at Controlled Room Temperature, typically 20 C to 25 C (68 F to 77 F).
Protection Protect from excessive moisture, heat, and direct light. Liquid forms must be kept from freezing.
Container Keep the medicine in its original container, ensure it is tightly closed, and do not use if the seal or blister unit is compromised.
Safety Must be stored out of the sight and reach of children.

Disposal Instructions

Unused or expired Alaspan should be disposed of using an official drug take-back program. If a take-back program is unavailable, mix the medicine with an unappealing substance (such as kitty litter), place it in a sealed container, and discard it in the household trash. It must not be flushed down a toilet or poured down a sink.

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

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