Several classes of medication lower heart rate, with beta-blockers being the most commonly prescribed. The right choice depends on why your heart rate is elevated, whether you have other conditions like asthma or heart failure, and how much rate reduction you need. A normal resting heart rate falls between 60 and 100 beats per minute, and a resting rate above 100 is classified as tachycardia.
Beta-Blockers
Beta-blockers are the most widely used medications for lowering heart rate. They work by blocking the effects of adrenaline (epinephrine) and its close relative norepinephrine on the heart. Normally, these stress hormones speed up your heart’s natural pacemaker, increase how forcefully the heart contracts, and make electrical signals travel faster through the heart muscle. Beta-blockers interrupt all of that, resulting in a slower heart rate, reduced contraction force, and more time for the heart to relax between beats.
The most commonly prescribed beta-blockers for heart rate control include metoprolol, atenolol, bisoprolol, nebivolol, and acebutolol. These are “cardio-selective,” meaning they primarily target the heart rather than affecting the lungs or blood vessels. This distinction matters: non-selective beta-blockers can tighten the airways, which makes them a poor choice for people with asthma. Cardio-selective versions carry a much lower risk of triggering breathing problems, though they’re still used cautiously in people with significant lung disease.
Beta-blockers are prescribed for a wide range of conditions: high blood pressure, irregular heart rhythms, chest pain from coronary artery disease, heart failure, and sometimes anxiety-related rapid heartbeat. The main side effects to watch for are fatigue, cold hands and feet, and dizziness. Because these drugs slow the heart, taking too much can push your rate below a safe level.
Calcium Channel Blockers
Not all calcium channel blockers lower heart rate. This drug class splits into two groups, and only one of them affects heart rhythm. The non-dihydropyridine types, primarily diltiazem and verapamil, slow the heart by blocking calcium from entering the cells in your heart’s electrical system, particularly the nodes that set your heart’s pace and regulate how fast signals travel from the upper to lower chambers.
The other group, dihydropyridines like amlodipine and nifedipine, acts almost entirely on blood vessels. Their effect on the heart’s electrical system is minimal at normal doses. A useful way to remember the difference: diltiazem and verapamil slow the heart and lower blood pressure, while amlodipine and similar drugs lower blood pressure without significantly changing heart rate.
Diltiazem and verapamil are particularly useful for controlling heart rate in atrial fibrillation and other fast rhythms that originate in the upper chambers of the heart. They’re often chosen when someone cannot tolerate beta-blockers. Side effects can include constipation (especially with verapamil), swollen ankles, and dizziness. Like beta-blockers, they carry a risk of slowing the heart too much, and the two drug classes are rarely combined because the effect can compound.
Ivabradine
Ivabradine takes a different approach from every other heart rate medication. Instead of blocking adrenaline or calcium, it targets a specific electrical current in your heart’s natural pacemaker cells, sometimes called the “funny current” because of its unusual behavior. By dampening this current, ivabradine slows the rate at which pacemaker cells fire without affecting blood pressure, heart contraction strength, or the heart’s electrical conduction pathways.
This selectivity makes ivabradine appealing for people with heart failure who already have low blood pressure and can’t tolerate higher doses of beta-blockers. In practice, it’s often prescribed alongside a beta-blocker rather than as a replacement. Clinical trials have shown it reduces both illness and death in people with cardiovascular disease. It’s sold under the brand name Corlanor and is typically reserved for patients whose resting heart rate remains above a certain threshold despite other treatments.
Digoxin
Digoxin is one of the oldest heart medications still in use, derived from the foxglove plant. It lowers heart rate through a two-part mechanism. First, it stimulates the vagus nerve, which is the body’s built-in braking system for the heart. Vagal stimulation slows the rate at which the heart’s pacemaker fires and delays electrical conduction through the node connecting the upper and lower chambers. Second, digoxin dials down the sympathetic “fight or flight” nervous system while boosting the calming parasympathetic response.
Digoxin is most commonly used for rate control in atrial fibrillation and for heart failure where the heart pumps weakly. Its main limitation is a narrow safety margin. The difference between a helpful dose and a toxic one is relatively small, so blood levels need periodic monitoring. Symptoms of too much digoxin can include nausea, visual disturbances, and dangerously slow or irregular heart rhythms.
Medications Used in Emergencies
When someone arrives at a hospital with a dangerously fast heart rhythm called supraventricular tachycardia, adenosine is typically the first drug used. It’s given through an IV and works almost instantly, briefly interrupting the electrical circuit that drives the abnormal rhythm. The European Society of Cardiology recommends it as a first-line treatment alongside physical techniques like bearing down or applying cold water to the face.
Adenosine has an extremely short half-life, meaning it’s broken down by the body within seconds. This is both its strength and its limitation: side effects like flushing, lightheadedness, chest tightness, and a brief but unsettling sense of dread pass almost immediately, but the drug sometimes wears off before it fully corrects the rhythm, requiring a second dose. It’s purely a hospital medication, not something prescribed for daily use.
Fish Oil and Heart Rate
Omega-3 fatty acids from fish oil have a modest but consistent effect on heart rate. A meta-analysis of 30 randomized controlled trials found that fish oil lowered resting heart rate by about 1.6 beats per minute overall, with a larger reduction of 2.5 bpm in people whose baseline heart rate was 69 bpm or higher. In one smaller trial of men with previous heart attacks and weakened hearts, omega-3 supplements reduced resting heart rate by 5 bpm and improved heart rate recovery after exercise.
The effect appears to require time. Trials lasting longer than 12 weeks saw meaningful reductions, while shorter trials showed little change. Interestingly, the dose of fish oil didn’t seem to matter much. The reduction comes from omega-3s decreasing the electrical excitability of heart muscle cells. While this is nowhere near powerful enough to replace prescription medication for someone with tachycardia, it’s a notable finding for long-term cardiovascular health, since even small sustained reductions in resting heart rate are associated with lower risk of sudden cardiac death.
When a Heart Rate Drops Too Low
Every medication that slows the heart carries the risk of slowing it too much. Drug-induced bradycardia, where the heart rate falls well below 60 bpm, can cause dizziness, lightheadedness, chest discomfort, fatigue, and fainting. In case reports, heart rates have dropped to around 40 bpm after starting certain medications, low enough to cause significant symptoms. This risk increases when multiple rate-lowering drugs are combined, when kidney or liver function is impaired (slowing the body’s ability to clear the drug), or when doses are increased too quickly.
If you notice unusual fatigue, frequent dizziness, or near-fainting episodes after starting or adjusting a heart rate medication, those symptoms deserve prompt attention. Most cases resolve with a dose adjustment or switching to a different drug.