Reversair is prescribed for:
Long-term management and prevention of asthma.
Acute prevention of Exercise-Induced Bronchoconstriction (EIB).
Relief of symptoms of allergic rhinitis (both seasonal & perennial).
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Class: Selective Leukotriene Receptor Antagonist
Montelukast specifically blocks CysLT1 receptors, preventing the action of leukotrienes (LTC4, LTD4, LTE4).
This inhibition reduces airway edema, smooth muscle contraction, and inflammatory cell activation.
Clinical benefit: improves asthma control and relieves allergic rhinitis symptoms.
Adults & Adolescents (≥15 years): 10 mg once daily.
Children 6–14 years: 5 mg once daily.
Children 2–5 years: 4 mg once daily (chewable tablet).
Children 6 months–5 years: 4 mg oral granules once daily (directly or mixed with cold water/soft food).
Elderly, renal impairment, mild-moderate hepatic impairment: No dose adjustment needed.
Common: Headache, diarrhea, fever, GI upset, nausea, URI, skin reactions.
Uncommon: Anxiety, dizziness, abnormal behavior, arthralgia, irritability, sleep disturbance.
Rare/Severe: Angioedema, hallucinations, hepatic dysfunction, pulmonary eosinophilia, suicidal ideation.
Generally safe with commonly used asthma therapies and drugs such as theophylline, steroids, digoxin, warfarin, and oral contraceptives.
Phenobarbital & rifampin: Reduce plasma levels (~40%) due to hepatic enzyme induction → monitor clinically.
No major interactions reported with thyroid hormones, NSAIDs, benzodiazepines, decongestants, etc.
Hypersensitivity to Montelukast or any component of the formulation.
Not for acute asthma attacks or status asthmaticus → patients must carry a rescue inhaler.
Can be continued during asthma exacerbations but should not replace corticosteroids abruptly.
Not to be used as sole therapy for exercise-induced bronchospasm.
Patients with aspirin-sensitive asthma must still avoid aspirin/NSAIDs.
Caution in pregnancy & lactation—use only if clearly needed.
Store below 30°C, in a cool, dry place away from moisture and light.
Keep out of reach of children.
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