Final answer:
Bradycardia should be included as a contraindication for using metoprolol to treat hypertension.
Step-by-step explanation:
When reinforcing teaching about using metoprolol to treat hypertension, the nurse should include bradycardia as a contraindication for this medication.
Metoprolol is a beta-blocker that works by blocking beta-1 receptors, thereby slowing the heart rate. Bradycardia is a condition characterized by a slow heart rate, and using metoprolol in patients with bradycardia can further decrease the heart rate to dangerous levels.
Therefore, if a patient already has bradycardia, it is contraindicated to use metoprolol as it can exacerbate the condition and lead to serious cardiovascular complications.