What is the maximum total dose of atropine in bradycardia management?

• A. 1 mg
• B. 3 mg
• C. 5 mg
• D. Atropine 1 mg IV, repeat PRN every 3-5 minutes (max dose 3 mg)

Answer: (D)

The key idea is the maximum total dose allowed when using atropine for symptomatic bradycardia. Atropine works by blocking parasympathetic (vagal) input to the heart, which helps raise the heart rate by increasing SA node firing and AV conduction. In practice, it’s given as small IV boluses and repeated every 3–5 minutes until there’s a response, with a safety ceiling of 3 mg total in adults. This makes the option that describes giving 1 mg IV and repeating every 3–5 minutes up to a maximum of 3 mg the best choice, because it conveys both the dosing rhythm and the correct cumulative limit. Doses up to 5 mg would exceed the recommended maximum and aren’t necessary, while using only 1 mg without reaching the ceiling could under-treat.