Paper II
2020 February (Supplementary) (2010 Scheme)

Question

Inhaled corticosteroids

Q33 marksShort Notes

Answer

Examples: Budesonide, Beclomethasone, Fluticasone

Mechanism of action

  • Bind to intracellular glucocorticoid receptors in airway cells, modulating gene transcription to reduce airway inflammation (reduced cytokine production, decreased inflammatory cell infiltration, reduced mucosal oedema)
  • Delivered directly to the airway, minimizing systemic absorption/side effects compared to oral corticosteroids

Uses

  • Maintenance therapy in bronchial asthma and COPD (long-term control, not for acute attacks)

Adverse effects

  • Oral candidiasis (thrush) — reduced by rinsing mouth after use
  • Dysphonia (hoarseness)
  • Minimal systemic effects at recommended doses; growth suppression in children with high-dose long-term use

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