What is the initial dose of atropine for adult bradycardia in ACLS?

The initial dose of atropine for adults experiencing bradycardia, as per the Advanced Cardiovascular Life Support (ACLS) guidelines, is 0.5 mg administered as a bolus. This dosage is established for treating symptomatic bradycardia in adult patients. Atropine works by blocking the action of the vagus nerve on the heart, which increases the heart rate by inhibiting parasympathetic influences.

In the event of symptomatic bradycardia, this initial dose can be repeated every 3 to 5 minutes as needed, with a maximum total dose of 3 mg. This standard approach is designed to effectively manage the condition while minimizing potential side effects associated with higher doses of the medication.