Overview
Beclomethasone is a synthetic corticosteroid used primarily as an inhaled medication for the management of asthma and other respiratory conditions. It acts locally in the lungs to reduce inflammation and swelling, with minimal systemic absorption when used correctly. It is also available in nasal and topical formulations for other indications.
Mechanism of Action
Beclomethasone is a glucocorticoid receptor agonist. It binds to intracellular glucocorticoid receptors, leading to the synthesis of anti-inflammatory proteins and inhibition of pro-inflammatory mediators (e.g., cytokines, leukotrienes). This reduces airway inflammation, edema, and mucus secretion in the lungs, improving respiratory function with minimal systemic effects due to low oral bioavailability and high first-pass metabolism.
Indications
- Maintenance treatment of asthma (prevention of symptoms)
- Allergic rhinitis (nasal spray formulation)
- Chronic obstructive pulmonary disease (COPD) maintenance in some cases
- Topical treatment of inflammatory skin conditions (dermatological formulations)
Dosage
Dosage varies by formulation and indication. For asthma (inhaled): Adults: 40-320 mcg twice daily; Children: 40-160 mcg twice daily, adjusted based on severity and response. For allergic rhinitis (nasal spray): 1-2 sprays per nostril once or twice daily. Always follow specific product instructions and healthcare provider guidance. Rinse mouth after inhalation to reduce oral thrush risk.
Contraindications
- Hypersensitivity to beclomethasone or any component of the formulation
- Primary treatment of status asthmaticus or acute asthma attacks (requires rescue medication)
- Untreated fungal, bacterial, or viral respiratory infections (for inhaled/nasal use)
- Active or quiescent tuberculosis of the respiratory tract
Side Effects
- Common: Oral candidiasis, hoarseness, throat irritation, cough
- Less common: Headache, nasal congestion (nasal spray), skin rash
- Rare but serious: Adrenal suppression, hypercorticism, osteoporosis, glaucoma, cataracts, hypersensitivity reactions
- Systemic effects are more likely with high doses or improper use
Interactions
- Strong CYP3A4 inhibitors (e.g., ketoconazole, ritonavir) may increase systemic exposure and risk of adverse effects
- Concurrent use with other corticosteroids may increase risk of systemic effects
- No significant interactions with common asthma medications like short-acting beta-agonists, but monitor overall therapy