What medication should be prescribed for a 12-year-old girl weighing 34 kg who is having an acute asthma attack with a three-day productive cough?

Immediate Treatment for Acute Asthma Attack

For this 12-year-old girl (34 kg) experiencing an acute asthma attack, prescribe nebulized salbutamol 5 mg (or terbutaline 10 mg) via oxygen-driven nebulizer, plus oral prednisolone 34-68 mg (1-2 mg/kg, maximum 40 mg), along with high-flow oxygen if available. 1

Initial Assessment and Severity Classification

First, rapidly assess severity using these criteria for acute severe asthma in children 1:

Acute Severe Features:

• Too breathless to talk or feed
• Respirations >50 breaths/min
• Pulse >140 beats/min
• Peak expiratory flow (PEF) <50% predicted (if measurable)

Life-Threatening Features:

• PEF <33% predicted
• Silent chest, cyanosis, or poor respiratory effort
• Fatigue, exhaustion, or reduced consciousness
• Agitation

The productive cough with phlegm for 3 days suggests a viral trigger, which is common in acute exacerbations.

First-Line Treatment Protocol

Immediate Medications:

1. Nebulized Beta-2 Agonist 1

   • Salbutamol 5 mg OR terbutaline 10 mg
   • Deliver via oxygen-driven nebulizer
   • Can use half-dose in very young children, but at 12 years, use full adult dose
   • Alternative if nebulizer unavailable: MDI with large-volume spacer, 1 puff every few seconds up to 20 puffs

2. Oral Corticosteroids 1

   • Prednisolone 1-2 mg/kg body weight
   • For 34 kg: 34-68 mg (maximum 40 mg per guidelines)
   • Give 40 mg prednisolone orally as single dose
   • Continue daily for up to 5 days

3. Oxygen 1

   • High-flow oxygen via face mask if available
   • Target oxygen saturation >92%

Reassessment at 15-30 Minutes

After initial treatment, reassess the patient 1:

If Improving:

• Continue oxygen
• Continue prednisolone 40 mg daily
• Nebulized beta-2 agonist every 4 hours

If NOT Improving After 15-30 Minutes:

• Continue oxygen and steroids
• Increase nebulized beta-2 agonist frequency to every 15-30 minutes
• Add ipratropium bromide 100 mcg (not 250 mcg—that's adult dose) to nebulizer, repeat every 6 hours 1, 2

Hospital Admission Criteria

Immediate hospital referral is indicated if: 1

• Any life-threatening features present
• Features of acute severe asthma persist after initial treatment
• PEF remains <50% predicted after treatment
• Inability to take or parents unable to give appropriate treatment
• Severe breathlessness with increasing tiredness

Critical Pitfalls to Avoid

1. Do NOT use aminophylline in general practice or mild-moderate attacks 1. Reserve only for life-threatening attacks in hospital settings with IV administration (5 mg/kg over 20 minutes) 1

2. Do NOT use subcutaneous epinephrine as first-line 3, 2. Beta-2 agonists have superior cost/benefit ratio. Epinephrine (0.01 mg/kg of 1:1000 solution, max 0.3-0.5 mg SC) is reserved only for severe exacerbations unresponsive to initial therapy 3

3. Do NOT delay corticosteroids—early systemic steroid use reduces ED visits and hospitalizations 2, 4

4. Do NOT substitute high-dose inhaled steroids for systemic steroids 2, 4

Additional Considerations for the Productive Cough

The 3-day productive cough likely represents a viral respiratory infection triggering the asthma exacerbation. This does NOT change acute management—antibiotics are not indicated unless there's clear evidence of bacterial pneumonia. The productive cough should improve as bronchospasm resolves with appropriate asthma treatment.

If Severe or Life-Threatening (Hospital Setting Only)

For severe attacks requiring hospitalization 1, 5:

• Intravenous magnesium sulfate reduces hospital length of stay and admission risk (high-certainty evidence)
• Consider if severe attack or unresponsive to initial inhaled therapy
• IV aminophylline only for life-threatening features: 5 mg/kg loading dose over 20 minutes, then 1 mg/kg/hour maintenance

Discharge Planning (If Treated Successfully at Home)

Before allowing home management 1:

• Objective confirmation of improvement required before leaving
• Continue prednisolone for 3-5 days total
• Step up maintenance asthma therapy
• Provide written asthma action plan
• Mandatory follow-up within 48 hours
• Consider initiating or increasing inhaled corticosteroids for maintenance

The evidence strongly supports this algorithmic approach, with the British Thoracic Society guidelines 1 providing the most comprehensive pediatric-specific protocols, reinforced by more recent systematic reviews 2, 5 confirming these core interventions reduce morbidity and prevent hospitalization.