A patient receiving a noncardioselective beta blocker would require caution if they have which preexisting condition?

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Multiple Choice

A patient receiving a noncardioselective beta blocker would require caution if they have which preexisting condition?

Noncardioselective beta blockers block both beta-1 receptors (in the heart) and beta-2 receptors (in the lungs). Blocking beta-2 in the bronchial smooth muscle can lead to bronchoconstriction, which worsens asthma and can trigger an attack. That bronchospastic risk makes asthma a condition that requires caution or avoidance when using noncardioselective beta blockers. In contrast, cardioselective (beta-1–selective) blockers primarily affect the heart and spare the lungs at usual doses, which is why they’re preferred in patients with asthma. Hypertension, diabetes, and hyperlipidemia don’t pose the same acute respiratory risk with these drugs, though diabetes has its own considerations (like potential masking of hypoglycemia).

Noncardioselective beta blockers block both beta-1 receptors (in the heart) and beta-2 receptors (in the lungs). Blocking beta-2 in the bronchial smooth muscle can lead to bronchoconstriction, which worsens asthma and can trigger an attack. That bronchospastic risk makes asthma a condition that requires caution or avoidance when using noncardioselective beta blockers. In contrast, cardioselective (beta-1–selective) blockers primarily affect the heart and spare the lungs at usual doses, which is why they’re preferred in patients with asthma. Hypertension, diabetes, and hyperlipidemia don’t pose the same acute respiratory risk with these drugs, though diabetes has its own considerations (like potential masking of hypoglycemia).

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