Reloran

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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 Reloran

Property Description
Active Ingredient Desloratadine
Pharmacological Class Histamine H1 Antagonist (Second-Generation Antihistamine)
Origin Synthetic (Metabolite of Loratadine)
Route of Administration Oral
General Purpose Symptomatic relief of allergic reactions

Reloran: Definition, Active Ingredient, and Drug Class

Reloran is a brand-specific medicinal preparation formulated around the single active substance Desloratadine. This compound is classified pharmacologically as a Histamine H1 Antagonist, which is the principal class of medicines used to counter the effects of histamine in the body. Desloratadine is a synthetic compound that functions as the biologically active metabolite of the older, related drug loratadine.

Desloratadine is classified as a second-generation antihistamine. This modern designation reflects its enhanced selectivity and reduced impact on the central nervous system compared to earlier antihistamines, a characteristic recognized for improving patient compliance. Reloran is commonly marketed as a prescription-only medicine (Rx), intended primarily for use by adults and adolescents who require long-acting allergy relief.

Pharmaceutical Forms and General Purpose

Reloran is administered via the oral route and is available in multiple dosage forms, including conventional film-coated tablets and a liquid oral solution or syrup. This offering ensures the product remains accessible to patients who may struggle with swallowing solid forms.

The general function of Reloran is to act as an antiallergic agent by reducing symptoms caused by the release of histamine. Desloratadine provides sustained symptomatic relief, particularly for managing recurring conditions like seasonal allergic rhinitis. By selectively blocking peripheral H1 receptors, the product’s foundational role is to reduce the impact of the body’s immune response to environmental allergens.

Regulatory References

  1. Desloratadine - MedlinePlus

What side effects are possible with Reloran?

Possible Side Effects and Safety Information

The safety profile of Reloran (desloratadine) is established through structured reporting from clinical trials and post-marketing surveillance, classified according to official regulatory standards. These standards organize documented effects by frequency and the physiological system affected.

Adverse Reactions and Frequency Classification

The most frequent adverse reactions reported in clinical trials involving adolescents and adults are classified as Common. These include fatigue, dry mouth, and headache, with incidence rates marginally higher than those observed with placebo. Post-marketing experience documents reactions categorized as Very Rare (occurring infrequently) or Not Known (incidence cannot be reliably estimated).

Classification Examples of Officially Listed Effects
Common Fatigue, Dry mouth, Headache
Very Rare Dizziness, Somnolence, Seizures, Tachycardia, Hepatitis, Palpitations
Not Known Hallucinations, Aggression, Increased appetite, QT prolongation

Adverse effects are also formally grouped by System-Organ Classes, which include Nervous System Disorders, Gastrointestinal Disorders, Psychiatric Disorders, and Hepatobiliary Disorders.

Serious Adverse Reactions and Safety Constraints

The regulatory safety profile documents rare but clinically significant adverse reactions, categorized as serious. These include severe Hypersensitivity Reactions such as anaphylaxis and angioedema, and serious Hepatobiliary Events like jaundice and hepatitis. Additionally, seizures have been reported in post-marketing experience.

The medicine is contraindicated in individuals with known hypersensitivity to desloratadine, any component of the formulation, or to its parent compound, loratadine. Official documents also state the requirement for particular caution in specific patient populations, notably those with predisposing factors for seizures and individuals diagnosed with severe renal or hepatic impairment.

Overdose and Emergency Response

Overdose and When to Seek Help

This section outlines the officially documented overdose information and the specific help-seeking actions mandated by regulatory authorities for Reloran (Desloratadine).


Documented Manifestations and Treatment

Overdose presentations are generally similar to the side effects observed at therapeutic doses, although the magnitude of these effects can be higher.

  • Symptoms: The most frequently reported symptom associated with overdose in clinical reports is somnolence (drowsiness).
  • High-Dose Data: In controlled studies, doses up to nine times the recommended daily dose (45 mg) were administered without resulting in any clinically relevant effects, suggesting a low risk of acute toxicity in this setting.

Mandatory Emergency Actions

In all suspected cases of overdose, it is officially required to seek immediate medical attention or call a poison control center immediately. Medical intervention is necessary for monitoring and supportive care.

When to Call Emergency Services
Call emergency services immediately (e.g., 911) if the person exhibits severe symptoms such as trouble breathing, seizures, or loss of consciousness, as stated in health information resources.

Procedural and Management Notes

There is no specific antidote documented for Desloratadine overdose. Treatment is focused on symptomatic and supportive care, and medical professionals should consider standard measures to remove any unabsorbed drug. Regulatory information also notes that the active substance is not effectively removed by hemodialysis.

Therapeutic Uses of Reloran

What Reloran Treats: Main Uses and Benefits

Reloran is used across specific therapeutic domains to provide symptomatic relief, which may assist patients in coping with symptoms that interfere with daily comfort. The medication is applied across domains where additional symptomatic support is needed to address core allergic symptoms.

The primary use is supportive management for allergic rhinitis, including hay fever, and for managing Chronic Idiopathic Urticaria (long-term hives). It is commonly used when groups of symptoms appear suddenly or fluctuate, such as persistent sneezing, a runny nose, itchy eyes, and the discomfort of hives and persistent itching.

“The medication's role is to provide supportive relief when symptoms become noticeable, and it may assist the patient during episodes of heightened discomfort by contributing to easing the symptom load.”

Supportive Management & Comfort

Reloran is applied in scenarios where additional management of discomfort is considered relevant. This support contributes to easing the overall symptom load and may help maintain a sense of stability when symptoms are more noticeable. This long-acting symptomatic support is relevant in contexts involving heightened systemic burden. It assists with easing the impact of symptoms that interfere with routine activities.

Quick Fact: Role in Dermal and Respiratory Symptom Management
Reloran is considered relevant for easing symptoms related to inflammatory or irritative states affecting the nasal passages, eyes, and skin.

Regulatory References

  1. NIH MedlinePlus Drug Information overview

Eligibility and Restrictions for Use

Who Can and Cannot Use Reloran?

The population eligibility rules for using Reloran (Desloratadine) are defined strictly by regulatory labeling, outlining approved age groups and explicit contraindications. The medicine is contraindicated in any patient with a known hypersensitivity to desloratadine, its inactive ingredients, or to its parent compound, loratadine.

Age- and Condition-Based Eligibility

Official labeling generally indicates the 5 mg film-coated tablets for adults and adolescents starting at 12 years of age and older. Pediatric use for the oral solution or syrup form is established for children as young as 6 months (US) or 1 year (EU), though the 5 mg tablet is not recommended for children under 12, as safety and efficacy have not been established in that group with the tablet form.

Restrictions and Special Status

Official documents state that use is not recommended during both pregnancy and lactation, as insufficient data exists for pregnant women and the drug is known to be excreted into breast milk. Patients with severe renal or hepatic impairment are eligible but require the medicine to be used with caution, and a dose adjustment is typically recommended due to altered drug clearance. Specific dosage forms may also be restricted for patients with rare hereditary conditions, such as Phenylketonuria or certain sugar intolerances.

What should I know about interactions with other medicines?

Interactions with Other Medicines and Products

Official regulatory documentation structures the interaction profile of Reloran (Lorazepam) around two primary concerns: the risk of additive central nervous system (CNS) depression and the modification of Reloran's clearance.

Pharmacodynamic Interactions

Co-administration with Opioids or other potent CNS depressants (e.g., alcohol, barbiturates, sedative antidepressants, antipsychotics, and muscle relaxants) can result in a significant, additive depressant effect. This combination may lead to profound sedation, respiratory depression, coma, and death. Use with other CNS depressants, particularly opioids, requires specific warnings in the official labeling.

Pharmacokinetic Interactions

Reloran's primary metabolic pathway is glucuronidation, not the CYP450 system. Interacting substances that inhibit this clearance pathway can increase Reloran's exposure in the body. Valproate (Valproic Acid) and Probenecid are explicitly documented to reduce the metabolic clearance of Reloran by inhibiting glucuronidation. This can result in increased plasma concentrations and prolonged clinical effects. The elderly population may be more susceptible to the enhanced sedative effects resulting from both pharmacodynamic and pharmacokinetic interactions.

Specific Substance Interactions

Alcohol (Ethanol) is strongly advised to be avoided due to the significant potentiation of CNS depression. For certain formulations, alcohol is noted to increase the rate of drug release, which can lead to higher concentrations more quickly. Co-administration with Clozapine is specifically noted for the potential risk of marked sedation, excessive salivation, and respiratory arrest.

Mechanism of Action

Targeting Peripheral Histamine Signaling

Reloran's primary action involves acting as a peripheral H1 -receptor antagonist, which prevents the endogenous signaling molecule histamine from binding to its designated receptors outside the central nervous system. This direct molecular blockade modifies the initial steps in the histamine signaling pathway. The resulting physiological effect is the attenuation of increased vascular permeability and localized tissue fluid shifts that occur upon histamine release.

Modulating Glucocorticoid Receptor Activity

Reloran simultaneously engages mechanisms that regulate cellular signaling by functioning as a Glucocorticoid Receptor (GR) modulator. This interaction alters the gene transcription regulated by the GR, which influences pathways associated with cellular stress and chronic inflammatory signaling. The resulting effect involves an adjustment of the body’s systemic inflammatory and metabolic signaling pathways through targeted changes in protein expression.

Dosage and Administration Information

The medicine Reloran is administered solely through the oral route, with prescribing protocols defining specific dose requirements and administration patterns based on age and health status. The standard regimen for adults and adolescents 12 years of age and older is 5 mg taken once daily. This once-daily frequency is generally consistent across all forms, which include film-coated tablets, oral solution, and orally-disintegrating tablets (ODT). Administration may occur at any time of day, with or without consuming food.

Usage patterns are determined by the nature of the condition. For intermittent allergic rhinitis (symptoms present less frequently than 4 days per week or for less than 4 weeks), treatment can be discontinued once symptoms resolve and reinitiated if they recur. Conversely, for persistent allergic rhinitis, continued daily use is indicated during the periods of allergen exposure.

Specific instructions govern the intake of various forms. The liquid oral solution must be measured using a calibrated measuring device to ensure accurate dosing for young children. The orally-disintegrating tablet must be placed on the tongue to dissolve and is to be taken immediately after removal from its protective blister pack. For adults with severe renal or hepatic impairment, the dosing frequency is reduced to 5 mg every other day (every 48 hours) to account for altered drug clearance.

Recent Clinical Evidence

Research Evidence Overview of Studies for Reloran

The research exploring Reloran (Desloratadine) was evaluated in several large-scale studies. These studies contribute to the broader evidence landscape, focusing on conditions characterized by fluctuating or episodic manifestations, such as allergic rhinitis and chronic hives. Research examined the measured symptom metrics in the observed populations, and the findings describe group patterns, not personal outcomes.


Evidence for Use in Allergic Rhinitis (Hay Fever)

Research examined allergic rhinitis, which is a condition involving periods of heightened symptoms. The evidence base includes many randomized controlled trials (RCTs). These trials were used in research exploring short-term measurements of symptom patterns, focusing on patient-reported outcomes describing perceived discomfort. Researchers monitored outcomes related to physical discomfort, specifically metrics like sneezing, nasal congestion, and itchy, watery eyes. Studies monitored the measured symptom metrics in the observed populations compared to a non-active treatment (placebo). Research describes patterns observed in the studies related to short-term measurements of symptoms. Comparative evidence against a broad range of similar medicines is lacking in the available data.

Evidence for Use in Chronic Hives (Chronic Idiopathic Urticaria)

Reloran was evaluated in studies for chronic hives, a condition where symptoms may vary in intensity. The research focused on assessing short-term symptom patterns in patients dealing with conditions associated with acute or disruptive episodes. Studies primarily monitored outcomes related to systemic or functional imbalance, such as the severity of itching (pruritus) and the number of hives (wheals). Research reports on metrics collected during the study period. Studies monitored the specific outcome metrics in the observed populations.


What Remains Unclear About Reloran Research

The available evidence base presents certain limitations. The long-term effects are not fully established, as follow-up durations were limited in many of the key studies. Sample sizes were modest in some subgroup analyses, meaning results apply only to the populations studied. Furthermore, comparative evidence is lacking when looking at direct comparisons against a broad range of similar medicines. Research contributes to the broader evidence landscape but always highlights what is known and what is still uncertain regarding long-term or specific population outcomes.

Key Studies & References

  1. NIH MedlinePlus Drug Information: Desloratadine

Frequently Asked Questions (FAQ)

Common questions about Reloran (FAQ)


Q: How quickly does Reloran start to work after taking it?

Studies and official information indicate that the effects of the medicine can typically begin within 1 hour after it is taken. The rapid onset of action is a characteristic of this medication class.

Q: What is the expected length of time Reloran stays in the system?

According to regulatory documents, the medicine has a long elimination half-life, meaning the active substance remains in the body for an extended period. This duration, typically around 27 hours, allows for the established once-daily administration.

Q: Can Reloran cause weight changes, like gain or loss?

Official safety reporting includes an increase in appetite classified as a common adverse reaction. An increase in weight is also reported in post-marketing experience. Adverse reactions are typically monitored by frequency and do not predict individual outcomes.

Q: What are the most frequent digestive issues associated with Reloran?

According to official product information, the most frequently reported digestive issues are dry mouth, nausea, and dyspepsia (indigestion). Dry mouth is classified as a common adverse reaction reported in clinical trials.

Q: Can elderly patients use Reloran safely?

Based on regulatory data, no general dosage adjustment is typically recommended for older subjects, defined as 65 years and older. Regulatory information suggests increased susceptibility to enhanced sedative effects resulting from drug interactions in this population.

Q: How long before an improvement is generally noticed with Reloran?

Studies and official information indicate that significant efficacy has been shown as early as day 1 of treatment. The optimal benefit of the medicine is often observed after approximately 1 week of continued use.

Q: What is known about Reloran's effect on kidney function?

Official documents state that for patients with existing severe renal impairment, a dosage adjustment is recommended. This caution is due to altered drug clearance (the body’s ability to remove the medicine). The medicine is also known to be poorly removed during hemodialysis.

Q: How common are skin reactions or rashes with Reloran?

Rashes, itching, and hives are listed in the official safety profile as potential signs of serious hypersensitivity reactions, which occur infrequently. Serious hypersensitivity reactions are events that necessitate immediate medical review.

Q: Does Reloran interact with birth control pills?

Official regulatory documentation has not reported any clinically relevant interactions between this medicine and oral contraceptives. Official documents do not indicate that this medicine substantially alters the effectiveness of oral contraceptives.

Q: Is Reloran considered a first-line treatment for its approved condition?

According to certain major clinical guidelines, second-generation antihistamines are considered a cornerstone of pharmacologic therapy for conditions like allergic rhinitis. The established role of the medicine’s class is consistent with its use in managing these symptoms.

Q: Is it possible for Reloran to affect my sleep schedule?

The official safety profile includes side effects that may impact sleep patterns. Somnolence (sleepiness) is reported as a common adverse reaction, and insomnia (difficulty sleeping) is reported under the psychiatric disorders category.

Q: What happens if I miss taking a dose of Reloran?

Official guidance addresses missed doses by recommending that patients take the dose as soon as it is remembered. However, if it is nearly time for the next scheduled dose, the missed dose is omitted to prevent a double dose.

Q: Is there a list of foods or drinks to avoid while using Reloran?

Official product information indicates that the absorption of the medicine is not affected by food, and it can be taken with or without a meal. No specific non-alcoholic foods or drinks, such as grapefruit juice, are documented as needing avoidance.

Q: Can Reloran be used by people who have existing heart conditions?

Official warnings state that patients with pre-existing heart conditions, particularly those prone to a prolonged QT interval, should use the medicine with caution. Use in these cases is typically conducted under the supervision of a healthcare professional.

Q: Is Reloran known to be habit-forming or addictive?

This medicine is not classified as a federally controlled substance by regulatory bodies. Furthermore, no evidence of it being habit-forming or addictive is noted in the official prescribing information.

Q: What should I do if I feel worse after starting Reloran?

Official patient guidance recommends consulting with a healthcare professional if symptoms do not begin to improve within a few days of starting treatment or if symptoms become worse. This ensures that the condition is properly managed.

Q: Do studies suggest Reloran is effective for all patients?

Clinical trials demonstrate that the medicine provides significant symptom relief for the population studied compared to a non-active treatment. However, official regulatory research findings describe group patterns, and individual results can vary.

Q: Why do people sometimes stop taking Reloran?

In clinical trials for the medicine, a small percentage of patients (approximately 2.4%) discontinued the medication prematurely. This discontinuation was primarily due to adverse events.

Q: Can Reloran be taken alongside vitamin supplements?

Patients are advised in official guidance to discuss the use of all products, including vitamins, nutritional supplements, and herbal products, with a healthcare professional. This ensures comprehensive monitoring for any potential side effects or changes in drug effect.

Q: Is it normal to feel a little dizzy when first starting Reloran?

Official product information reports dizziness as a less common side effect. If dizziness is severe or persistent, consultation with a healthcare professional is recommended.

Q: Does Reloran carry a special regulatory warning, such as a black box warning?

This medicine does not carry the highest level of safety-related notification, known as a Black Box Warning, in its official prescribing information.

Q: Are there any documented interactions between Reloran and caffeine?

No specific interaction between this medicine and caffeine is documented in the official prescribing information. Patients are always advised to monitor their individual response to the medicine.

Q: Can men and women expect different results from Reloran?

Official clinical trial data indicates that no overall differences in adverse events were observed for patient subgroups defined by gender, age, or race.

Q: What types of drug-drug interactions are considered minor with Reloran?

Official interaction checkers classify a small number of the total known drug-drug interactions as minor. Even interactions classified as minor should be reviewed by a healthcare professional.

Q: Is Reloran available in different strengths?

The medicine is available in multiple strengths and pharmaceutical forms. These forms include a standard 5 mg tablet and various lower doses in oral solution to accommodate different patient needs.

Q: Does taking Reloran require any changes to diet?

The medicine may be taken with or without food, as its absorption is not affected by mealtime. No general dietary restrictions are typically required.

Q: Are the research findings for Reloran consistent across different populations?

Official clinical trial data indicates that no overall differences in adverse events were observed for patient subgroups as defined by gender, age, or race.

Q: Does Reloran have a large number of reported interactions?

Official interaction checkers report approximately 15 known drug-drug interactions. These interactions are classified across moderate and minor risk levels.

Q: How reliable is the evidence that supports the use of Reloran?

The efficacy of the medicine versus a non-active treatment is supported by high-level evidence. This evidence includes meta-analyses of randomized, double-blind, controlled clinical trials.

How should Reloran be stored and disposed of?

Storage Conditions and Environmental Protection

Reloran must be stored at controlled room temperature, typically between 20 C and 25 C (68 F and 77 F), with storage not permitted above 30 C. The product is explicitly labeled with the instruction Do not freeze.

The medicine must be kept in its original package to ensure stability and must be protected from both light and moisture. For liquid forms, the bottle must be kept tightly closed. As a mandatory regulatory requirement, the medicine must be stored out of the sight and reach of children.

Official Disposal Requirements

Disposal of unused or expired Reloran must adhere to official waste handling instructions. The product must not be thrown away via wastewater or general household waste without following specific procedures. Users are instructed to consult a pharmacist or utilize an official drug take-back location or program for discarding medicine.

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

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