Medications to Avoid with Bradycardia

Primary Medications to Avoid

The American College of Cardiology recommends avoiding beta-blockers, non-dihydropyridine calcium channel blockers, digoxin, and certain antiarrhythmic drugs in patients with bradycardia, as they can further slow heart rate or worsen conduction 1, 2
Non-dihydropyridine calcium channel blockers, such as verapamil and diltiazem, can cause significant bradycardia, heart block, and sinus node dysfunction 1
Digoxin can cause bradycardia and heart block, especially in patients with pre-existing conduction system disease, and its dose should be reduced by 30-50% when administered with amiodarone 1, 4
Class IC agents, such as flecainide and propafenone, can cause bradycardia and are contraindicated in patients with sinus or AV conduction disease 1, 5
Class III agents, such as amiodarone, sotalol, and dofetilide, can cause significant bradycardia and QT prolongation 1, 5
Ivabradine directly inhibits the sinoatrial node and is contraindicated in patients with bradycardia 5, 6

Amiodarone can increase serum levels of digoxin by 30-50%, requiring dose adjustment 1, 6
Certain anticancer drugs, such as ceritinib, crizotinib, and vemurafenib, can induce bradyarrhythmias, especially when combined with AV nodal blocking agents 7
Heart transplant patients may have paradoxical responses to atropine, making management of drug-induced bradycardia more challenging 2

Atropine is first-line therapy for symptomatic bradycardia, but may be ineffective in severe cases 3
Isoproterenol can be used when atropine is ineffective, but should be avoided in settings of coronary ischemia 3, 2
Temporary pacing may be required for severe, symptomatic bradycardia unresponsive to medical therapy 2

ACE inhibitors or ARBs can be used instead of beta-blockers or calcium channel blockers for hypertension 4
Dihydropyridine calcium channel blockers, such as amlodipine and nifedipine, have less effect on heart rate than non-dihydropyridines 7
Cautious use of digoxin at lower doses with close monitoring can be considered for patients with bradycardia who require rate control 4
Catheter ablation can be considered for patients with symptomatic atrial fibrillation who cannot tolerate rate-controlling medications 7
Nitrates can be used instead of beta-blockers or calcium channel blockers for angina 4
Ranolazine has minimal effect on heart rate and can be used for angina 6