A patient is to receive a beta agonist. Before administration of this medication, which assessment finding would most concern the nurse?

Choice A reason: Pulse oximetry of 95% is near normal and not a major concern for beta agonist administration. Tachycardia is more critical due to cardiac stimulation, so this is incorrect. Choice B reason: A respiratory rate of 22 is slightly elevated but acceptable in respiratory conditions. Beta agonists target airways, but tachycardia is a greater risk, making this incorrect. Choice C reason: Blood pressure of 100/60 mm Hg is low, but beta agonists primarily affect heart rate. A pre-existing tachycardia is more concerning contraindication, so this is incorrect. Choice D reason: A heart rate of 120 beats/min is concerning, as beta agonists increase heart rate, risking arrhythmias. This requires evaluation before administration, making it the correct concern.