Final answer:
A patient with HTN and asthma taking propranolol is most at risk of developing bronchospasm as a side effect.
Step-by-step explanation:
When a patient with hypertension and asthma is taking propranolol, they are at the highest risk of developing bronchospasm as a side effect. Propranolol is a non-selective beta-blocker, which means it can block the beta2 receptors in the lungs, causing constriction of the airways and bronchospasm. This can be particularly problematic for patients with asthma, as it can worsen their symptoms and potentially trigger an asthma attack.
It is important for the patient to monitor their symptoms closely while taking propranolol and consult with their healthcare provider if they experience any difficulty breathing or worsening of their asthma symptoms. Other side effects of propranolol can include insomnia, but bronchospasm poses a greater risk for this particular patient.