A client receiving frequent nebulized albuterol for a severe asthma exacerbation develops marked tremor and palpitations. The heart rate is 142/min and potassium is 2.8 mEq/L. Which action should the nurse take?
1Give an extra albuterol treatment because tachycardia confirms inadequate beta-2 stimulation.
2Notify the provider, maintain cardiac monitoring, and anticipate treatment-plan and potassium reassessment.✓ Correct answer
3Change to oral albuterol because it causes fewer systemic effects than inhaled therapy.
4Administer a sedative and delay evaluation until the asthma exacerbation has resolved.
Explanation
High-dose or excessive beta-2 agonist exposure can cause marked tachycardia, tremor, arrhythmias, and hypokalemia through intracellular potassium shift. The nurse should notify the provider promptly, continue cardiac and respiratory monitoring, and anticipate reassessment of albuterol exposure, electrolytes, and prescribed potassium treatment. More albuterol, oral substitution, sedation, or delayed evaluation can worsen or conceal toxicity.
Clinical reasoning Beta-2 stimulation shifts potassium into cells and can produce systemic adrenergic effects. A heart rate of 142/min plus symptomatic potassium 2.8 mEq/L creates an arrhythmia risk during intensive bronchodilator therapy.
Decision rule Escalate significant tachycardia and hypokalemia during frequent albuterol therapy, maintain monitoring, and coordinate bronchodilator and electrolyte management rather than adding unreviewed doses.
Scenario 32-year-old male in status asthmaticus receiving back-to-back albuterol nebulizers × 3. Now HR 145, fine tremor, serum K+ 2.9 mEq/L, on continuous cardiac monitor.
Beta-2 agonist hypokalemia — A transcellular potassium shift caused by beta-2 stimulation that can lower serum potassium and increase cardiac risk.
Albuterol systemic effects — High exposure can cause tremor, nervousness, tachycardia, palpitations, arrhythmias, glucose changes, and hypokalemia.
Potassium replacement — IV KCl indicated when K <3.0 with symptoms; max peripheral rate 10 mEq/hr.