diltiazem vs sotalol
Side-by-side comparison of diltiazem and sotalol. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
minor Known Drug Interaction
7.2 Negative Chronotropes Digitalis glycosides, diltiazem, verapamil, and beta-blockers slow atrioventricular conduction and decrease heart rate.
Recommendation: Your doctor should monitor your heart rate and pulse closely to make sure they do not become too slow.
Diltiazem is a medicine that helps lower high blood pressure and prevent chest pain. It belongs to a class of drugs called calcium channel blockers.
Sotalol is a medicine that helps keep your heart beating regularly. It can treat dangerous fast heartbeats and help prevent irregular heartbeats from coming back.
Diltiazem is used to treat high blood pressure. It can be used alone or with other blood pressure medicines. Diltiazem also helps manage chronic stable angina (chest pain) and angina caused by spasms in the heart's blood vessels.
Sotalol is used to treat life-threatening fast heartbeats in the lower chambers of the heart. It is also used to help keep a normal heart rhythm in people with atrial fibrillation or flutter, which are types of irregular heartbeats in the upper chambers of the heart. Sotalol is for people who have very bothersome symptoms from their atrial fibrillation or flutter.
Diltiazem works by relaxing blood vessels, which lowers blood pressure. It also reduces the heart's workload, which can prevent chest pain. This medicine blocks calcium from entering heart and blood vessel cells.
Sotalol works by slowing down the electrical signals in your heart. It has two actions: it blocks beta receptors (like a beta-blocker) and it prolongs the action potential duration in the heart. This helps to stabilize your heart rhythm and prevent irregular heartbeats.
- • Swelling in your ankles or feet
- • Headache
- • Dizziness
- • Slow heart rate
- • Constipation
- • Feeling tired
- • Slow heart rate (less than 50 bpm)
- • Shortness of breath
- • New or worsening irregular heartbeats
- • Weakness
- Shortness of breath 3,200
- Tiredness 2,637
- Feeling sick to your stomach 2,372
- Discomfort 2,364
- Feeling lightheaded 2,089
- Irregular heartbeat 1,178
- Shortness of breath 912
- Tiredness 867
- Feeling lightheaded 734
- Loose stool 719
Diltiazem can interact with other heart medications. Tell your doctor if you take beta-blockers or digoxin. Using diltiazem with these drugs can cause heart problems. Your doctor may need to adjust your dosages.
Sotalol can cause life-threatening irregular heartbeats. To lower this risk, you will start or restart sotalol in a hospital where your heart can be monitored. If your QT interval (a measure on your heart tracing) gets too long (500 msec or greater), your doctor may lower your dose or stop the medicine. Your doctor will check your kidney function to decide the right dose for you.
Tell your doctor if you are pregnant, plan to become pregnant, or are breastfeeding. It is not known if diltiazem will harm your unborn baby. Diltiazem passes into breast milk, so talk to your doctor about breastfeeding while taking this medicine.
Sotalol can harm your unborn baby, so talk to your doctor if you are pregnant or plan to become pregnant. Sotalol can pass into breast milk and may harm a nursing infant, so do not breastfeed while taking sotalol.
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How to Read This diltiazem vs sotalol Comparison
diltiazem is classified in the Calcium Channel Blocker drug class, while sotalol sits within the Class III Antiarrhythmic / Beta-Blocker class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, diltiazem has 12,662 submissions while sotalol has 4,410. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known minor interaction flagged in FDA labeling, attributed to both of these medicines slow down your heart rate and the electrical signals that travel through your heart.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between diltiazem and sotalol - always consult your physician or pharmacist first.
Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.