Which beta blocker would be most appropriate for a patient with asthma?

Betaxolol is the most appropriate choice of beta blocker for a patient with asthma because it is a selective beta-1 adrenergic antagonist. Beta-1 selective blockers are less likely to cause bronchoconstriction compared to non-selective beta blockers, which block both beta-1 and beta-2 receptors.

In individuals with asthma, non-selective beta blockers, such as timolol, carteolol, and levobunolol, can exacerbate respiratory conditions by blocking beta-2 receptors found in bronchial smooth muscle, leading to potential bronchospasm and worsening of asthma symptoms.

In contrast, betaxolol focuses its action primarily on the cardiac beta-1 receptors, making it safer for use in patients who also have respiratory issues. This selectivity is crucial in managing eye conditions, such as glaucoma, in asthmatic patients, ensuring that the therapeutic benefits are achieved without triggering bronchial complications.