A 35-year-old man with moderate persistent asthma on inhaled beclomethasone 200 mcg twice daily presents with a 2-week history of increased cough, wheezing, and dyspnea despite good inhaler technique. He denies fever or upper respiratory symptoms. Peak expiratory flow (PEF) is 65% of his personal best. Chest X-ray is unremarkable. What is the most appropriate immediate management?

Explanation

## Clinical Assessment of Acute Asthma Exacerbation **Key Point:** This patient has an acute asthma exacerbation characterized by: - Acute worsening over 2 weeks despite baseline controller therapy - Objective evidence of airflow obstruction (PEF 65% of personal best = moderate exacerbation) - No infectious trigger identified - Normal chest X-ray (excludes pneumonia, pneumothorax) ## GINA Management of Acute Exacerbations ```mermaid flowchart TD A[Acute Asthma Exacerbation]:::outcome --> B{PEF or FEV₁ severity?}:::decision B -->|Mild-Moderate: 50-80%| C[Increase ICS dose]:::action B -->|Mild-Moderate: 50-80%| D[Add short-course OCS]:::action B -->|Severe: <50%| E[Urgent hospitalization]:::urgent C --> F[Consider LABA addition]:::action D --> F F --> G[Reassess in 1-2 weeks]:::decision ``` **High-Yield:** Acute exacerbations require **both** increased ICS dose AND a short course of oral corticosteroids (OCS) to suppress airway inflammation rapidly. ## Why Oral Corticosteroids? 1. **Systemic anti-inflammatory effect:** Oral corticosteroids penetrate throughout the lungs, not just the site of inhaler deposition 2. **Faster onset:** OCS reduce exacerbation duration and prevent hospitalization 3. **Evidence-based:** GINA and BTS guidelines recommend OCS for all exacerbations with PEF 50–80% of personal best 4. **Typical dosing:** Prednisolone 40–50 mg daily for 5–7 days (no taper required for short courses) **Clinical Pearl:** Doubling the ICS dose alone is insufficient for acute exacerbations. The systemic route is necessary to achieve adequate anti-inflammatory control. ## Step-Up Strategy After Exacerbation | Current Therapy | Exacerbation Response | Next Step | | --- | --- | --- | | Low-dose ICS | Exacerbation | Medium-dose ICS + LABA | | Medium-dose ICS | Exacerbation | High-dose ICS + LABA | | ICS/LABA | Exacerbation | Add LTRA or LAMA; consider biologic | **Mnemonic:** **OCS-ICS** = Oral Corticosteroids + Increased Inhaled Corticosteroid dose for acute exacerbations ## Expected Timeline - **Days 1–3:** OCS + increased ICS reduce inflammation - **Days 3–7:** PEF improves; symptoms resolve - **Week 2:** Reassess; if controlled, maintain new ICS dose; if not, escalate to ICS/LABA - **Week 4:** Review trigger identification and asthma action plan