Which adjunct medication may be considered for wheezing or bronchospasm?

Which adjunct medication may be considered for wheezing or bronchospasm?

• A. Systemic antibiotics
• B. Aerosolized lidocaine
• C. Magnesium sulfate 2 g in 50 mL over 10 min
• D. Oral prednisone

Answer: (C)

When treating wheezing or bronchospasm, you want an adjunct that directly helps relax the airway smooth muscle and improve airflow quickly. Magnesium sulfate given IV over about 10 minutes fits that role. It acts as a calcium channel blocker, which relaxes bronchial smooth muscle and reduces airway resistance, making it a useful adjunct in severe bronchospasm when inhaled bronchodilators aren’t enough. The specified dose of 2 g in 50 mL over 10 minutes reflects this acute, rapid-acting effect. Systemic antibiotics don’t address the acute bronchospasm and won’t provide immediate relief. Aerosolized lidocaine isn’t a bronchodilator and could irritate airways. Oral prednisone helps inflammation but has a slower onset and isn’t as helpful for the immediate episode in the EMS setting.

When treating wheezing or bronchospasm, you want an adjunct that directly helps relax the airway smooth muscle and improve airflow quickly. Magnesium sulfate given IV over about 10 minutes fits that role. It acts as a calcium channel blocker, which relaxes bronchial smooth muscle and reduces airway resistance, making it a useful adjunct in severe bronchospasm when inhaled bronchodilators aren’t enough. The specified dose of 2 g in 50 mL over 10 minutes reflects this acute, rapid-acting effect.

Systemic antibiotics don’t address the acute bronchospasm and won’t provide immediate relief. Aerosolized lidocaine isn’t a bronchodilator and could irritate airways. Oral prednisone helps inflammation but has a slower onset and isn’t as helpful for the immediate episode in the EMS setting.