Levonis

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Levonis

Treatment option: Asthma, Bronchospasm

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 Levonis

Levonis is a medicine classified as a corticosteroid, defined by its sole active component, Flunisolide. This compound is a synthetic fluorinated steroid analog designed for powerful, localized anti-inflammatory and anti-allergic activity.


Quick Facts About Levonis

Property Description
Active ingredient Flunisolide (INN)
Form Nasal spray, Nasal solution, Inhalation aerosol
Pharmacological class Glucocorticoid (Corticosteroid)
General purpose Anti-inflammatory and anti-allergic agent
Origin Synthetic (fluorinated steroid analog)

What Type of Medicine is Levonis? (Identity and Class)

Levonis, containing Flunisolide, is a single-ingredient product categorized definitively within the glucocorticoid pharmacological class. The substance is a chemical derivative manufactured through synthesis, confirming its status as a synthetic steroid rather than a naturally sourced compound. Flunisolide has an established role as a highly effective topical corticosteroid for mucosal application.

Flunisolide's Composition and Form (Structure and Delivery)

The core composition of Levonis consists of the active Flunisolide ingredient combined with an appropriate base, which is typically an aqueous medium or specialized propellants and excipients. The product is formulated for targeted application in two main dosage forms: an aqueous nasal solution or nasal spray for intranasal administration, and an oral inhalation aerosol for use in the lungs. A key differentiating feature is that Flunisolide is often utilized in concentrations specifically optimized for pediatric patients (children 6 years of age and older) and adults. The delivery of Flunisolide via nasal spray or inhaler is intended to maximize its effect on the mucosal lining while limiting systemic exposure.

General Purpose of Levonis (Core Benefit)

The general purpose of Levonis is to serve as a potent anti-inflammatory and anti-allergic agent in the breathing passages. By utilizing the properties of the Flunisolide corticosteroid, the medicine is recognized for its ability to reduce chronic swelling and tissue hyper-reactivity. This function provides a prophylactic therapy designed to maintain stability in the nasal or pulmonary tissues, helping to mitigate the discomfort and irritation associated with long-term inflammatory conditions, such as those caused by seasonal environmental factors.

Regulatory References

  1. National Institutes of Health (NIH) MedlinePlus Flunisolide Nasal Spray

What side effects are possible with Levonis?

Possible Side Effects and Safety Information

The regulatory safety profile for Levonis is characterized by warnings of serious and potentially permanent adverse reactions. Official documentation from government health authorities structures these risks into distinct categories.

Key Serious Adverse Reactions

Official prescribing information includes a strong, mandatory warning regarding the risk of disabling and potentially irreversible adverse reactions that can occur together. These serious events involve:

  • Tendons and Musculoskeletal System: Tendinitis and tendon rupture (tearing), which can affect all ages, with increased risk in older patients or those taking corticosteroids.
  • Nervous System: Peripheral neuropathy, which may include symptoms like pain, burning, tingling, or weakness in the extremities, and may become permanent.
  • Central Nervous System (CNS): Effects such as anxiety, confusion, seizures, hallucinations, depression, and tremors.

Adverse reactions may have a delayed onset, occurring hours to weeks after starting the medicine, and may persist for extended periods after the medicine is stopped.

Common Adverse Reactions

Reactions reported as common (occurring in 1 in 10 to 1 in 100 patients) include nausea, diarrhea, headache, insomnia, constipation, and dizziness.

Safety-Related Restrictions

Regulatory agencies have restricted the use of this medicine for certain uncomplicated bacterial infections (e.g., acute bacterial sinusitis, acute bacterial exacerbation of chronic bronchitis, uncomplicated urinary tract infections). In these cases, Levonis should be reserved for patients who have no alternative treatment options available.

Population-Specific Warnings

Use is generally avoided in pediatric patients due to the risk of musculoskeletal problems. Caution is advised in older patients (typically over 60 years of age) due to an increased risk of tendon rupture and QT interval prolongation. It is also contraindicated in patients with a known history of myasthenia gravis as it may exacerbate muscle weakness.

Overdose and Emergency Response

Overdose and When to Seek Help

Overdose with Levonis may be life-threatening and requires immediate emergency medical attention. The most serious and primary risk is life-threatening respiratory depression, which can lead to apnea (cessation of breathing), severe central nervous system (CNS) depression, coma, permanent brain damage, and death.

Documented Overdose Symptoms

Symptoms of a Levonis overdose generally involve severe depression of vital functions and include:

  • Respiratory System: Significantly slowed or shallow breathing (hypoventilation), respiratory arrest.
  • Central Nervous System: Extreme sleepiness, inability to wake up or respond, unresponsiveness, stupor, coma, miosis (pinpoint pupils), and muscle flaccidity.
  • Cardiovascular System: Bradycardia (slow heart rate), severe hypotension (low blood pressure), and circulatory collapse.

Overdose Risk Factors and Emergency Actions

Overdose risk is significantly increased when Levonis is taken in excessively high doses, or when combined with other CNS depressants, such as alcohol or benzodiazepines. Due to the high quantity of medication present, extended-release formulations carry an especially high risk of serious overdose and death.

When to Seek Immediate Medical Help

Call 911 or local emergency services immediately if you or someone else has taken too much Levonis, or if any of the following signs are observed:

  • Slowed, shallow, or difficult breathing.
  • Severe dizziness or inability to stay awake.
  • Inability to wake the person up, even with stimulation.

If an overdose is suspected, initial emergency treatment involves establishing a patent airway and providing ventilation, followed by the administration of an opioid antagonist, such as naloxone. Medical monitoring must be continuous, as respiratory depression can recur after initial treatment.

Therapeutic Uses of Levonis

What Levonis Treats: Main Uses and Benefits

Levonis is relevant in contexts involving heightened systemic burden across several symptomatic domains, in line with established uses for its drug class. It is relevant in clinical settings when supportive symptom management is appropriate across conditions presenting with systemic or localized discomfort.

The medication is relevant in clinical settings involving acute or disruptive symptom patterns, such as those related to lower respiratory tract discomfort, urinary tract distress, and skin and soft tissue manifestations.

Levonis helps address symptom clusters that may become intense or disruptive in these areas. The general patient-oriented benefit is that it provides support that helps ease the overall symptom burden, and supports patients during difficult episodes by easing distress.


Quick Fact: Support for Symptoms related to Systemic Imbalance

Respiratory Discomfort and Congestion

This domain involves managing symptoms related to lower respiratory tract discomfort. The therapy supports the patient during symptomatic periods, addressing symptoms like persistent cough and chest congestion, by assisting with easing the overall symptom load.

Urinary Tract and Kidney Symptom Management

Levonis is applied in contexts marked by increased discomfort due to infections affecting the urinary tract. It is used for managing symptoms that create noticeable physiological strain, like painful or frequent urination, and may assist with easing distress and supporting patients during difficult episodes.

Eligibility and Restrictions for Use

Population Eligibility and Contraindications

The eligibility profile for Levonis (Flunisolide) is defined by specific population and clinical restrictions in regulatory labeling.

Absolute Non-Eligibility

Levonis is strictly contraindicated for patients with a known hypersensitivity or allergy to flunisolide or any component of the formulation. It must not be used for the relief of acute bronchospasm or status asthmaticus.

Age Group Rules

Use is approved for adults and adolescents 12 years of age and older. The medicine is also indicated for pediatric patients from 6 to 11 years of age. Safety and efficacy have not been established in children younger than 6 years of age, and the drug is not indicated for this population.

Conditional Use and Restrictions

Use is subject to caution in patients with active or quiescent tuberculosis of the respiratory tract or other untreated systemic infections (fungal, bacterial, or viral). For the nasal form, use is restricted until healing has occurred following recent nasal surgery, trauma, or septal ulcers.

Pregnancy and Lactation

In pregnancy, the medicine should be used only if the potential benefit justifies the potential risk to the fetus. Caution is recommended during breastfeeding, as it is not known if flunisolide is distributed into human milk.

What should I know about interactions with other medicines?

Interaction Map: Interactions with other medicines and products — official regulatory information for Levonis (Flunisolide)


Interaction Scope

  • Medicinal product categories with documented interactions: Systemic Corticosteroids, Hepatic Microsomal Enzyme Modulators (Inducers/Inhibitors).
  • Specific interacting medicines (if explicitly listed): Prednisone (as a systemic corticosteroid example); Esketamine (Nasal) (pharmacodynamic interaction).
  • Mechanistic basis of interactions (only if stated in label): Additive Glucocorticoid Effect (HPA axis risk); Enhanced Metabolism (via hepatic enzymes, leading to reduced plasma levels).
  • Timing-based interaction rules (if applicable): Co-administration of nasal corticosteroids with Esketamine (Nasal) requires timing separation.
  • Population-specific interaction notes (if applicable): None documented.
  • Interaction-related restrictions: Restriction on co-administration with other systemic corticosteroids due to the risk of HPA axis suppression.

Interaction Classifications (High-Level)

  • Interaction severity classification (as defined in official documents): Clinically significant interactions are classified as those requiring monitoring due to additive systemic effects or exposure modification.
  • Regulatory basis (EMA / FDA / etc.): U.S. Food and Drug Administration (FDA) / National Institutes of Health (NIH) DailyMed.
  • Interaction-context constraints (as defined in official documents): Constraints exist on the co-administration of any substance that carries additive glucocorticoid activity.

Resulting interaction structure

Official interaction statements:

  • Co-administration with other systemic corticosteroids increases the likelihood of Hypothalamic-Pituitary-Adrenal (HPA) axis suppression.
  • Substances that are potent inducers of hepatic microsomal enzymes may enhance the metabolism of Flunisolide, potentially reducing its plasma concentrations.
  • Potent CYP3A4 inhibitors may similarly affect hepatic metabolism, potentially increasing systemic exposure.
  • Nasal corticosteroids may decrease the therapeutic effects of co-administered Esketamine (Nasal).
  • No specific interaction is documented in regulatory labeling for co-administration with food, alcohol, or herbal products.

Connection to the overall interaction profile (2–4 sentences): The official regulatory profile for Flunisolide is defined by pharmacodynamic interactions that create an additive glucocorticoid burden and pharmacokinetic interactions concerning hepatic metabolism modulation. The documentation highlights the risk of HPA axis suppression when combined with other steroids and the potential for altered plasma concentrations with strong enzyme modulators. The profile contains no mandatory timing separation rules for most products and no documented interactions with food or alcohol.

Mechanism of Action

The Mechanism of Levonis

Levonis functions as a selective inhibitor of the Phosphoinositide 3-kinase delta ( PI3Kdelta) enzyme. This enzyme, specifically its p110delta catalytic subunit, is involved in the activation and survival signaling of specific leukocytes, including B- and T-lymphocytes. By binding directly to the enzyme's active site, Levonis prevents PI3Kdelta from converting PIP2 into the downstream signaling molecule PIP3.

This inhibition initiates an intracellular cascade block, reducing the downstream activity of kinases like AKT ( Protein Kinase B). This modification of the core signaling sequence results in the suppression of signaling activity in lymphocytes. The subsequent modulation of survival and proliferation signals within B- and T-lymphocyte populations adjusts systemic immune signaling. This mechanism limits lymphocyte proliferation and activity, thereby modulating the production of inflammatory mediators, which shapes the resulting physiological adjustments.

Dosage and Administration Information

How to Use Levonis

Levonis (Flunisolide) administration follows established protocols to ensure proper localized delivery to the nasal or bronchial mucosa. The medicine is strictly utilized via either an intranasal metered-dose spray or an oral inhalation aerosol. Administration must occur at regular intervals and is designed for consistent scheduled use rather than for immediate effect.


Official Administration Schedule

Administration Domain Official Regimen / Requirement
Route of Administration Intranasal or Oral Inhalation only.
Adult Dosing Schedule Nasal: Two sprays in each nostril twice daily (BID), not to exceed 400 mcg per day. Inhalation: 160 mcg twice daily (BID), up to a maximum of 640 mcg total daily dose.
Pediatric Use Specific schedules are approved for children aged 6 years for both nasal and inhalation forms, which specify a lower total maximum daily dose.
Preparation and Handling The nasal spray pump must be primed with test sprays before initial use or after a lapse in use. Post-inhalation, patients must rinse the mouth with water and discard the water.

Use-Context and Duration

The established usage protocol dictates that the medication is not intended for immediate relief; full therapeutic effect typically requires one to two weeks of continuous, scheduled administration. Once control is achieved, it is advised to perform a downward dose titration to the lowest amount required for maintenance. Strict adherence to the total daily dose and the prescribed route of administration is required across all labeled indications.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Levonis

Levonis, which contains the medicine Flunisolide, was studied for use in conditions associated with inflammation in the breathing passages. The research was primarily conducted through highly regulated randomized controlled trials (RCTs). Research provides context but not individual predictions; findings describe group patterns related to the specific conditions under which they were conducted. Research does not determine whether an individual will respond similarly.


Evidence for Use in Allergic Rhinitis (Nasal Symptoms)

Studies monitored outcomes related to physical discomfort in adults and pediatric patients (6 years of age and older). These included the total score for nasal symptoms, such as sneezing, runny nose (rhinorrhea), and nasal congestion (stuffy nose). Some trials described patterns where changes measured during the study period differed between the active treatment group and the placebo group. Studies noted that the time required to reach the maximum change observed in symptoms may require one to two weeks of continuous use.


Evidence for Use in Maintenance Treatment of Asthma

This medicine was studied for use as a regular, preventive treatment for asthma. Studies monitored key functional outcomes, including pulmonary function measures (such as FEV1) and data show patterns related to the frequency of rescue medication use during episodes. Research describes changes in pulmonary function that were measured over the study duration. Clinical studies confirmed that this medicine is not studied for or intended for providing immediate relief from an acute asthma attack.


What is Still Uncertain About Levonis Research

Follow-up durations were limited in many primary efficacy studies, meaning that the long-term effects on disease progression are not fully established. The research provides limited information for very specific subgroups, such as the elderly. For less common indications, such as nasal polyps, comparative evidence is lacking, and certainty remains low due to smaller study sizes. The safety and effectiveness has not been established in children younger than 6 years of age.

Key Studies & References Flunisolide Nasal Solution USP, 0.025% - DailyMed (Official Prescribing Information)

Frequently Asked Questions (FAQ)

Common questions about Levonis (FAQ)


Q: What is the main condition Levonis is officially approved to treat?

According to official product information, Levonis (Flunisolide) is approved for the management of nasal symptoms associated with perennial or seasonal allergic rhinitis. It is also approved for the maintenance treatment of asthma. It is noted that Levonis is a maintenance therapy and is not intended for the relief of acute asthma attacks.

Q: Does Levonis treat the root cause or just the symptoms of the condition?

Levonis is a corticosteroid that functions as a long-term controller or prophylactic therapy. It works by decreasing swelling and irritation (inflammation) in the airways and nasal passages. The purpose is to manage the underlying inflammatory process associated with the condition rather than providing immediate symptom relief or curing the condition.

Q: Is Levonis the same as [Commonly known similar drug name]?

Levonis contains the single active ingredient Flunisolide, as described in official documents. Since it is a single-ingredient product, it is chemically distinct from any other medicine that contains a different active component. Products are named and identified by their unique active pharmaceutical ingredients.

Q: What happens if I stop using Levonis suddenly?

Official documentation describes that abrupt discontinuation of Levonis, particularly after prolonged use, is associated with specific risks. These risks may include signs of adrenal insufficiency or a worsening of the underlying condition. Regulatory instructions generally indicate that dose changes should be managed through a gradual decrease.

Q: How long can a person typically expect to use Levonis?

Levonis is intended for regular, consistent scheduled use as a maintenance or prophylactic therapy for chronic conditions. Once therapeutic control is achieved, regulatory instructions generally describe reducing the dose to the lowest effective amount needed to maintain that control. The duration of use is determined by the specific condition being managed.

Q: Is Levonis considered a long-term treatment option?

Levonis is prescribed for the long-term maintenance of chronic respiratory conditions. Official information notes that long-term use is associated with specific risks, requiring regular patient monitoring to evaluate the risk profile.

Q: Can Levonis cause long-term health problems?

Long-term use of inhaled and nasal corticosteroids is described as being associated with a risk of developing certain conditions, such as cataracts or decreased bone mineral density. Official documents indicate that patient monitoring is a regulatory expectation during extended use.

Q: Can Levonis interact with over-the-counter supplements like vitamins?

Official documentation does not specifically list interactions with vitamins or non-herbal supplements. However, the product label describes a restriction on co-administration with substances that are known to affect liver enzymes, which are responsible for drug metabolism.

Q: Why do some people report feeling [Vague, non-serious side effect, e.g., slightly dizzy] when they start Levonis?

The feeling of dizziness is listed in official documentation as a less common or uncommon reported adverse reaction. Official sources document that the reaction occurs in a group of patients, but they do not always provide a specific physiological mechanism for every single reported effect.

Q: Does the research on Levonis cover specific ethnic or age groups?

The medicine is studied and approved for use in adults and in children who are six years of age and older. Official documentation contains limited information regarding use in the elderly population. The product labeling is generally silent on data specific to different ethnic groups.

Q: Is Levonis generally considered to be well-tolerated?

Official documentation provides a description of both common side effects and the potential for serious adverse reactions. The individual response to the medication varies widely among individuals. It is not possible to generalize overall tolerability based on group data.

Q: Are generic versions of Levonis available, and are they considered equivalent?

The active ingredient in Levonis, Flunisolide, is available in generic formulations. Regulatory bodies require that generic products demonstrate bioequivalence to the brand-name product. This means the generic must deliver the same amount of the active ingredient into the bloodstream over the same period to be considered therapeutically equivalent.

Q: What kind of patient monitoring is recommended while on Levonis?

Official product information describes that patient monitoring is an expectation during use. This includes observing effects related to the HPA (hypothalamic-pituitary-adrenal) axis, which is the body's natural stress response system. Monitoring also covers the potential for ocular effects or changes in bone mineral density for long-term users.

Q: What is the general safety classification of Levonis for long-term use?

The use of Levonis as a maintenance corticosteroid requires monitoring for systemic effects, such as HPA axis suppression, and local effects. The documented risk profile is assessed by regulatory agencies as acceptable for use in the labeled chronic conditions when the medication is used as directed.

Q: Why does Levonis sometimes cause [Specific common side effect]? (e.g., nausea, headache)

Common side effects like headache, nausea, and diarrhea are reported in patient groups during clinical trials. While regulatory documents list these reactions based on incidence, they typically do not specify the exact physiological mechanism for every single adverse reaction.

Q: Is it safe to use Levonis if I have [Common chronic condition, e.g., high blood pressure]?

Official documentation lists specific conditions that are contraindications (reasons to strictly avoid use) or require caution, such as certain systemic infections. However, the documentation does not list specific warnings for every common chronic condition like high blood pressure or diabetes.

Q: Is Levonis known to cause weight gain or weight loss?

Official adverse reaction reports for flunisolide inhalation list both increased appetite and weight gain as reported side effects. These effects are classified as common in the official documentation.

Q: Is Levonis a controlled substance or scheduled drug?

Levonis, which contains the corticosteroid Flunisolide, is not classified as a controlled substance under the U.S. Controlled Substances Act. It is a prescription medicine that is regulated as a non-scheduled drug.

Q: Are there any laboratory tests needed before starting Levonis?

The official product label does not mandate specific routine laboratory tests before the medicine is started. However, monitoring of HPA axis function, which may involve lab tests, is a regulatory expectation for certain patient populations, such as those being transitioned from oral corticosteroids.

Q: Can Levonis still be effective if a dose is missed?

Levonis is designed for consistent, scheduled use for optimal effectiveness, as it works to manage chronic inflammation over time. Regulatory patient information describes that if a dose is missed, a common pattern of action is to skip the missed dose and resume the normal schedule, without doubling up the dose.

Q: Is Levonis used in other countries for different purposes?

Official regulatory documents across major global territories define the approved uses for Levonis (Flunisolide). These approved uses generally center on the maintenance treatment of asthma and the management of allergic rhinitis across major global territories.

Q: What should be done if an official boxed warning applies to me?

Official documents state that the development or persistence of symptoms related to serious adverse reactions or warnings requires evaluation by a healthcare provider. This need for prompt evaluation is also described if the patient is exposed to specific infections like chickenpox or measles.

Q: Are there official restrictions on driving or operating machinery while using Levonis?

Official labeling does not contain an explicit regulatory warning against driving or operating heavy machinery. However, official documents describe possible central nervous system (CNS) adverse reactions, such as dizziness or confusion, which may occur during use.

Q: Is the condition Levonis treats curable or only manageable?

Levonis helps to control and manage the inflammation associated with conditions like asthma and allergic rhinitis. Official sources indicate that Flunisolide inhalation is a management therapy and does not cure these chronic conditions. It works over time to maintain stability in the tissues.

Q: Does Levonis interact with birth control pills?

Official documentation does not list a specific interaction between Levonis and oral contraceptives. However, the product label describes that interactions can occur with substances that affect the liver enzymes responsible for drug metabolism.

Q: Is Levonis safe for people with liver or kidney issues?

Levonis is largely metabolized by the liver, and official labeling recommends caution in the elderly, who are more likely to have age-related liver or kidney problems. The official documents do not list specific contraindications for general hepatic or renal impairment.

Q: Can Levonis affect a person's ability to conceive?

Non-clinical reproductive studies conducted in female animals indicated that high doses of flunisolide may impair fertility. These doses were administered by routes other than inhalation. Official documents state that the relevance of this specific finding to human fertility is currently uncertain.

Q: What is the typical time frame for the drug to clear out of the body?

The medicine Flunisolide is rapidly metabolized by the body. Official pharmacokinetic documents report that the elimination half-life of the drug has been measured to be approximately 1.8 hours to 2.5 hours.

Q: Does Levonis carry a risk of vision changes or eye problems?

Long-term administration of inhaled corticosteroids has been associated with ocular effects such as cataracts, glaucoma, or increased intraocular pressure (IOP). Official information describes that patients with a history of these conditions are subject to closer monitoring as a regulatory expectation.

Q: Does Levonis affect blood sugar levels?

The product itself is not primarily linked to blood sugar changes at labeled doses. However, official documentation regarding drug interactions states that co-administration with certain anti-diabetic medications may increase the risk or severity of high blood sugar (hyperglycemia).

Q: Does Levonis require a special doctor to prescribe it?

Levonis is only available with a doctor's prescription. Official labeling describes the medicine's indications but does not mandate that a specific type of specialist, such as an allergist or pulmonologist, is required to prescribe the medicine.

Q: Is it possible to have no side effects at all while taking Levonis?

Official documentation reports the incidence of both common and serious side effects observed in groups of patients in clinical trials. While not every individual will experience a reported side effect, official sources cannot provide a guarantee that any individual will have no side effects.

How should Levonis be stored and disposed of?

Storage and Disposal Requirements

Levonis (Flunisolide) must be stored strictly according to the conditions defined in regulatory labeling to maintain product stability and safety.

Condition Requirement (Official Statement)
Temperature Range Store at controlled room temperature, typically between 15 C and 30 C (59 F and 86 F).
Environmental Protection Keep the product out of the sight and reach of children and pets. Protect from freezing, excessive heat, and direct light.
Packaging Rules Keep in the original container and ensure it is tightly closed. Aerosol canisters must not be punctured or thrown into a fire/incinerator.
Stability / Expiry Discard the medicine after the printed expiration date. For certain presentations, the product must be discarded after a labeled number of sprays or a set period (e.g., 2 months) after opening.
Disposal Dispose of unused or expired medicine through an official drug take-back program. If not available, follow the standard guidance of mixing the drug with an undesirable substance in a sealed container before placing it in household trash. Do not flush the product.

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

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