Contraindications and Precautions for Dipyridamole and Dobutamine

Introduction to Contraindications

The American Heart Association recommends that dipyridamole should not be used in patients with known or suspected bronchoconstrictive or bronchospastic disease, recent use of dipyridamole or dipyridamole-containing medications, or use of methylxanthines within 12 hours 1, 2
The American College of Cardiology suggests that dipyridamole is contraindicated in patients with significant arrhythmias, such as ventricular tachycardia or second or third-degree atrioventricular block 2
The American Heart Association advises that dipyridamole should not be used in patients with sinus bradycardia less than 45 bpm, significant hypotension, high-risk unstable angina, complicated acute coronary syndrome, or acute myocardial infarction less than 2 days old 1, 2
The American College of Cardiology recommends that dipyridamole is contraindicated in patients with severe systemic arterial hypertension, acute illness, or other conditions that may increase the risk of adverse effects 1, 2

The American College of Cardiology states that dobutamine is contraindicated in patients with critical aortic stenosis, hemodynamically significant left ventricular outflow tract obstruction, or uncontrolled hypertension 3, 4
The American Heart Association suggests that dobutamine should not be used in patients with serious ventricular arrhythmias, high-risk unstable angina, active acute coronary syndrome, or acute myocardial infarction less than 2 days old 2, 5
The American College of Cardiology recommends that dobutamine is contraindicated in patients with uncontrolled heart failure, uncontrolled atrial fibrillation, or atrioventricular block 1, 2, 5, 6

Monitoring for hypotension is essential with both medications, especially in elderly patients or those on other medications with hypotensive effects, as recommended by the American Geriatrics Society 7
The American College of Cardiology suggests that if one agent is contraindicated, the other may be considered as an alternative, but never together 1, 2