Description
Comprehensive Guide to Levolin 0.63mg Respules (Levosalbutamol)
Levolin 0.63mg Respules is an inhalation solution manufactured by Cipla Ltd. Each single-dose plastic unit (respule) contains:
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Levosalbutamol (also known as Levalbuterol): 0.63 mg in 2.5 mL normal saline solution
Levolin belongs to the pharmacological class of short-acting beta-2 adrenergic receptor agonists (SABAs). It is prescribed as a fast-acting bronchodilator (reliever medication) for the prevention and treatment of bronchospasm in patients aged 6 years and older with reversible obstructive airway diseases, primarily Asthma and Chronic Obstructive Pulmonary Disease (COPD).
Unlike racemic salbutamol (which contains an equal mixture of R- and S-isomers), Levolin contains exclusively the purified (R)-enantiomer (levosalbutamol). This selective single-isomer formulation delivers bronchodilation at lower doses while reducing cardiovascular side effects often caused by the inactive (S)-isomer.
Quick Product Fact Sheet
| Feature | Details |
| Brand Name | Levolin 0.63mg Respules |
| Active Ingredient | Levosalbutamol / Levalbuterol (0.63 mg per 2.5 mL) |
| Manufacturer | Cipla Ltd. |
| Therapeutic Class | Respiratory agent / Fast-acting bronchodilator |
| Pharmacological Class | Short-Acting Beta-2 Adrenergic Agonist (SABA) |
| Dosage Form | Inhalation solution (single-dose plastic respules) |
| Administration Route | Inhalation via a jet nebulizer (never swallow or inject) |
| Onset of Action | 10 to 17 minutes (peak effect within 1.5 hours) |
| Duration of Action | Approximately 5 to 6 hours (up to 8 hours in select patients) |
| Packaging | Pack of 5 or 6 respules (2.5 mL each) in protective foil pouches |
How Levolin 0.63mg Works
During an asthma exacerbation or COPD flare, the smooth muscles surrounding the bronchial airways constrict. This bronchospasm, combined with local inflammation and mucus production, narrows the air passages and restricts airflow.
[Inhalation of Levosalbutamol Aerosol via Nebulizer]
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[Binds Selectively to Beta-2 Adrenergic Receptors in Airway Smooth Muscle]
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[Stimulates Adenylyl Cyclase Enzyme]
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[Converts Intracellular ATP into Cyclic AMP (cAMP)]
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[Activation of Protein Kinase A (PKA)]
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┌────────────────┴────────────────┐
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[Inhibits Myosin Phosphorylation] [Decreases Intracellular Calcium]
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└────────────────┬────────────────┘
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[BRONCHIAL SMOOTH MUSCLE RELAXATION]
• Rapid airway opening (bronchodilation) within 10-15 minutes
• Eases airflow in and out of the lungs
• Relieves wheezing, chest tightness, coughing, and shortness of breath
The (R)-Enantiomer Advantage
Standard albuterol/salbutamol is a racemic 50:50 mixture of two optical isomers: (R)-salbutamol and (S)-salbutamol.
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(R)-Salbutamol (Levosalbutamol): Binds to beta-2 receptors with roughly 100-fold higher affinity than the (S)-isomer, driving almost all beneficial bronchodilator activity.
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(S)-Salbutamol: Historically regarded as inert, the (S)-isomer is cleared more slowly from the body and can promote airway hyper-reactivity, paradoxical bronchoconstriction, and systemic side effects.
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Levolin Benefit: By delivering only the pure active (R)-isomer, Levolin 0.63mg provides bronchodilator relief at approximately half the dose of racemic salbutamol, minimizing palpitations, tremors, and tachycardia.
Approved Medical Indications
Levolin 0.63mg Respules is indicated for adult and pediatric patients (6 years of age and older) for:
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Acute Bronchospasm Relief in Asthma: Immediate treatment of sudden airway constriction, wheezing, breathlessness, and chest tightness during acute asthma episodes.
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Chronic Obstructive Pulmonary Disease (COPD): Reversible airway obstruction relief in chronic bronchitis and emphysema.
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Prevention of Exercise-Induced Bronchospasm (EIB): Inhaled shortly before exertion to protect airways against exercise-triggered narrowing.
Important Note: Levolin is a reliever (rescue) medicine, not a controller. It does not treat the underlying chronic inflammation of asthma or COPD. Patients with persistent asthma must use a daily anti-inflammatory controller (such as an inhaled corticosteroid) alongside their rescue bronchodilator.
Standard Dosage and Administration Guidelines
Levolin 0.63mg Respules must be administered strictly through a medical jet nebulizer connected to an air compressor or an ultrasonic nebulizer.
Standard Dosage Framework
| Patient Group | Recommended Dosing Schedule | Daily Maximum |
| Adults and Adolescents (12 years and older) | One 0.63mg respule (2.5 mL) administered by nebulization three times daily, every 6 to 8 hours as needed. | Up to 1.25 mg three times daily under specialist guidance for severe obstruction. |
| Children (6 to 11 years of age) | One 0.31mg or 0.63mg respule administered by nebulization three times daily. | Do not exceed 0.63 mg three times daily in this age group. |
| Children under 6 years of age | Safety and clinical efficacy have not been formally established. | Use only under direct pediatric pulmonology direction. |
Step-by-Step Nebulizer Administration Guide
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Clean Hands: Wash hands thoroughly with soap and water before handling the respule and nebulizer.
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Open the Foil Pouch: Remove a single plastic respule from the protective foil strip. Keep remaining respules in the foil pouch to protect them from light.
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Inspect the Solution: Check the liquid inside. It should be clear and colorless. Do not use if the solution is discolored, cloudy, or contains particles.
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Open the Respule: Hold the body of the respule upright and twist off the top tab completely.
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Fill the Chamber: Squeeze the entire 2.5 mL liquid contents directly into the nebulizer medication cup. Do not mix or dilute with other medicines unless explicitly instructed by your physician.
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Assemble and Inhale: Connect the medication cup to the mouthpiece or face mask, attach the tubing to the compressor, turn on the machine, and breathe calmly through your mouth until the mist stops (typically 5 to 15 minutes).
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Rinse and Clean: Discard the empty plastic vial immediately. Rinse your mouth with water after inhalation to prevent throat dryness, and clean the nebulizer cup according to the manufacturer’s directions.
[Twist Off Top] ──► [Squeeze Entire 2.5mL into Cup] ──► [Nebulize 10-15 Mins] ──► [Discard Respule]
Critical Safety Warning: Frequency of Use Check
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Rule of Threes: If you find yourself needing to use Levolin Respules more than 2 to 3 times per week for daytime asthma symptoms, or if a single treatment does not provide relief lasting at least 3 to 4 hours, your asthma is not well controlled.
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Do Not Double the Dose: Increasing bronchodilator frequency instead of using anti-inflammatory therapy can mask worsening airway inflammation and increase the risk of severe, life-threatening asthma exacerbations. Contact your physician promptly to adjust your daily controller medication (inhaled steroid).
Potential Side Effects & Clinical Management
Levolin 0.63mg is generally better tolerated than older racemic salbutamol formulations, but beta-adrenergic side effects can still occur.
Common Side Effects
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Musculoskeletal: Fine skeletal muscle tremors, particularly noticeable in the hands and fingers.
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Cardiovascular: Palpitations, mild tachycardia (faster heart rate), or minor blood pressure shifts.
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Nervous System: Nervousness, mild anxiety, headache, or dizziness.
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Respiratory: Throat irritation, mild cough, or dry mouth.
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Gastrointestinal: Nausea or mild dyspepsia.
Serious Warnings (Seek Immediate Medical Care)
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Paradoxical Bronchospasm: In rare cases, inhaling a bronchodilator can trigger immediate, acute airway constriction with sudden worsening of wheezing and shortness of breath. If this occurs, stop using Levolin immediately, take an alternative fast-acting bronchodilator from a different class if available, and seek emergency care.
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Hypokalemia (Low Blood Potassium): Beta-2 agonists can shift potassium from the blood into cells, potentially causing low blood potassium levels. Symptoms include muscle weakness, leg cramps, or irregular heart rhythms.
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Cardiovascular Strain: In patients with pre-existing heart disease, high doses can cause chest pain (angina), arrhythmias, or significant blood pressure elevations.
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Immediate Allergic Reactions: Anaphylaxis, angioedema (swelling of the face, lips, or tongue), urticaria (hives), and severe skin rashes.
Precautions & Clinical Monitoring
| Test / Examination | Recommended Frequency | Purpose |
| Peak Expiratory Flow (PEF) / FEV1 | Routine home/clinic tracking | Monitors airway caliber and checks response to bronchodilator therapy. |
| Heart Rate & Blood Pressure | Baseline and periodic clinic visits | Screens for tachycardia, arrhythmias, and hypertension. |
| Serum Potassium Levels | As clinically indicated in high-risk patients | Monitors for hypokalemia, especially when combined with potassium-wasting diuretics. |
| Blood Glucose Levels | Periodic checks in diabetic patients | Beta-agonists can transiently increase blood sugar levels via hepatic glycogenolysis. |
Drug Interactions & Substance Warnings
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Non-Selective Beta-Blockers (e.g., Propranolol, Timolol eye drops): Beta-blockers directly counteract the therapeutic effects of levosalbutamol, blocking beta-2 receptors and potentially triggering severe, life-threatening bronchospasm in asthmatic individuals. Concurrent use is generally contraindicated.
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Potassium-Depleting Diuretics (e.g., Furosemide, Hydrochlorothiazide): Co-administration can compound potassium shifts, deepening hypokalemia and increasing cardiac arrhythmia risks.
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Digoxin: Beta-agonists may cause a modest decrease in serum digoxin levels (roughly 16% to 22%). Monitoring blood digoxin concentrations is advised.
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Monoamine Oxidase Inhibitors (MAOIs) & Tricyclic Antidepressants (TCAs): Co-administration within 2 weeks of taking MAOIs or TCAs can potentiate vascular and cardiovascular effects of beta-agonists.
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Other Sympathomimetic Agents: Avoid taking additional oral or inhaled short-acting bronchodilators simultaneously unless directed by a specialist, as cumulative cardiovascular toxicity can occur.
Special Population Guidance
| Population | Clinical Advice |
| Pregnancy | Use only if the potential benefit justifies potential risks to the fetus. Beta-2 agonists can interfere with uterine contractility; use during labor and delivery requires cautious clinical evaluation. |
| Breastfeeding | It is unknown whether levosalbutamol passes into human breast milk. Consult your physician before using while nursing. |
| Cardiovascular Disease | Use with caution in patients with coronary artery disease, history of arrhythmias, severe hypertension, or heart failure. |
| Hyperthyroidism & Diabetes | Use with caution. Beta-agonists can worsen tachycardia in hyperthyroid patients and can elevate blood glucose in diabetic patients. |
| Renal Impairment | Levosalbutamol is excreted primarily through the kidneys. Use caution and clinical monitoring in patients with reduced kidney filtration. |
| Pediatric Use | Approved for children aged 6 years and older. In children aged 6 to 11, the starting dose is usually 0.31 mg to 0.63 mg up to three times daily. |
Storage and Handling Protocols
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Store respules between 20°C and 25°C (68°F to 77°F). Protect from excessive heat and direct light.
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Keep unopened respules inside the original foil pouch. Once a foil pouch is opened, use the respules within the timeframe stated on the package (typically within 2 to 4 weeks).
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Each respule is designed for single use only. Use the liquid immediately after opening; discard any unused leftover solution in the vial.
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Do not freeze the solution.
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Keep strictly out of reach of children and pets.
Frequently Asked Questions (FAQs)
Q1: Can I swallow the liquid inside the Levolin Respule?
No. Levolin Respules contain a sterile solution made specifically for inhalation through a nebulizer machine into your lungs. It must never be swallowed, drunk, injected, or put into the eyes.
Q2: What is the difference between Levolin (Levosalbutamol) and Asthalin (Salbutamol)?
Asthalin contains racemic salbutamol, which is a 50:50 mix of two isomers: the active (R)-isomer and the inactive (S)-isomer. Levolin contains only the active (R)-isomer (levosalbutamol). Because the (S)-isomer is removed, Levolin requires a lower dose to open airways and tends to cause fewer heart-racing palpitations and hand tremors.
Q3: Can Levolin Respules be used in an asthma inhaler (puffer)?
No. Respules are designed only for use in nebulizer machines. If you need a portable inhaler for work or travel, your doctor can prescribe Levolin in a Metered-Dose Inhaler (MDI) or dry powder Inhaler formulation.
Q4: Can Levolin cure asthma or COPD?
No. Levolin is a bronchodilator reliever medicine. It provides rapid, temporary relief by relaxing tight airway muscles during breathing difficulties. It does not cure the underlying condition or eliminate airway inflammation. You must continue taking your regular daily controller medicines as prescribed.
Medical Disclaimer
This clinical guide is strictly for educational, informational, and professional onboarding documentation purposes and must not replace individualized medical advice, clinical diagnosis, or professional treatment. Always consult a qualified pulmonologist, allergist, or healthcare provider before initiating, modifying, or discontinuing any respiratory medication.
References
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U.S. Food and Drug Administration (FDA):Xopenex (levalbuterol inhalation solution) Full Prescribing Information.
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National Center for Biotechnology Information (NCBI):StatPearls Review: Levalbuterol Mechanism of Action, Indications, and Clinical Pharmacology.
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Global Initiative for Asthma (GINA):Global Strategy for Asthma Management and Prevention Guidelines.
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Global Initiative for Chronic Obstructive Lung Disease (GOLD):Global Strategy for the Diagnosis, Management, and Prevention of COPD.
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MedlinePlus (U.S. National Library of Medicine):Levalbuterol Oral Inhalation Drug Information & Safety Instructions.
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