Can Entresto (sacubitril/valsartan) cause bradycardia?
Entresto’s labeled effects focus on heart failure and blood-pressure lowering. Bradycardia (slow heart rate) is not typically described as a common direct side effect of Entresto itself. However, slow heart rate can still happen indirectly in people taking Entresto—especially if they also take other medications that slow the heart (such as beta-blockers, ivabradine, digoxin, or certain antiarrhythmics), or if blood pressure drops enough to worsen overall cardiac function.
Why would someone on Entresto develop a slow heart rate?
Several mechanisms can contribute when bradycardia shows up after starting or increasing Entresto:
Low blood pressure with reflex changes: Entresto lowers blood pressure in many patients. If blood pressure falls significantly, people may experience dizziness, fatigue, or lightheadedness, and heart-rate patterns can become abnormal in some individuals.
Drug interactions with heart-rate–lowering meds: The most common real-world driver of bradycardia is often the combined effect of multiple rate-slowing drugs taken alongside Entresto.
Underlying conduction system disease or progression of heart failure: Patients with existing conduction abnormalities (for example, AV block) may be more vulnerable to clinically significant bradycardia when their overall cardiac status changes.
What symptoms should trigger urgent care?
Seek urgent medical attention if bradycardia is accompanied by any of the following: fainting or near-fainting, severe dizziness, chest pain, shortness of breath at rest, confusion, or signs of shock (cold/clammy skin, severe weakness). Symptomatic bradycardia can require immediate evaluation and treatment.
Could Entresto worsen heart block or atrioventricular (AV) conduction?
Entresto is not known as a primary “AV block–causing” drug in the way some other cardiac medications are. Still, in practice, clinicians pay close attention to conduction issues because bradycardia can reflect an evolving conduction problem, especially in patients with baseline rhythm disorders or those on multiple cardiac drugs.
What should you do if you notice bradycardia after starting Entresto?
Discuss it promptly with the prescriber. Clinicians typically:
Review the full medication list for other bradycardia-inducing drugs.
Check blood pressure and symptoms.
Confirm the rhythm with an ECG and assess electrolytes (for example, potassium and magnesium) and overall heart status.
Adjust dose or timing if needed, and address any contributing medication.
Is bradycardia a reason to stop Entresto?
Do not stop Entresto on your own. If bradycardia is symptomatic or the rhythm is concerning, the prescribing team may reduce the dose, pause it temporarily, or change other heart-rate–affecting medications while monitoring the patient.
What changes in heart rate are expected after Entresto?
Entresto can reduce cardiac strain and improve heart failure physiology, but it does not usually cause a predictable “slow heart rate” pattern like drugs specifically built to lower heart rate. If bradycardia appears after a dose change, it raises the likelihood of medication overlap, conduction disease, or blood-pressure-related effects that warrant evaluation.
What other heart failure drugs can cause bradycardia more directly?
In many patients, bradycardia is more commonly linked to:
Beta-blockers (like metoprolol, carvedilol, bisoprolol)
Ivabradine
Digoxin
Some antiarrhythmics
If you’re trying to pinpoint the cause, the timing relative to dose changes of these agents is often more informative than the timing relative to Entresto.
If you tell me your situation, I can help narrow the likely cause
If you share your age, current doses of Entresto and any other heart medicines, your resting heart rate range, whether you have symptoms (dizziness, fainting), and any ECG history (like AV block or bundle branch block), I can help map the most likely contributors and what to ask your cardiologist.