What is a common side effect of beta-blockers in dysrhythmia management?

The correct answer highlights the common side effects associated with beta-blockers, particularly bradycardia and hypotension. Beta-blockers work by blocking the action of adrenaline on beta-adrenergic receptors, which leads to a decrease in heart rate and reduction of blood pressure. Because they inhibit the natural stimulatory effects of sympathetic nervous system activity, these medications can significantly lower heart rates, leading to bradycardia, which is defined as a heart rate that is too slow (typically less than 60 beats per minute). Additionally, the reduction in cardiac output can cause hypotension, meaning lower than normal blood pressure. Both of these effects are critical considerations when using beta-blockers for managing dysrhythmias, as they can have direct implications for patient safety and medication management.

In contrast, the other options do not align with the predominant effects of beta-blockers. Increased heart rate would be counterproductive to the purpose of beta-blockers. Anxiety and insomnia can occur with some medications, but they are not primary side effects of beta-blockers. Dry mouth and constipation are more associated with other classes of medications rather than with beta-blockers, making bradycardia and hypotension the most relevant side effects in the context of dysrhythm