acebutolol vs atenolol
Side-by-side comparison of acebutolol and atenolol Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
Sectral
Tenormin
Acebutolol is a medicine that helps lower blood pressure and control irregular heartbeats. It belongs to a class of drugs called beta-blockers.
Atenolol is a medicine that lowers blood pressure. It can also help with chest pain and after a heart attack.
Acebutolol is used to treat high blood pressure in adults. It can be used alone or with other blood pressure medicines. Acebutolol is also used to manage irregular heartbeats called ventricular arrhythmias. It helps to reduce the number of these irregular beats.
Atenolol is used to treat high blood pressure (hypertension). Lowering blood pressure reduces the risk of strokes and heart attacks. Atenolol is also used long-term for chest pain (angina) caused by narrowed arteries. It can also help people who have had a heart attack.
Acebutolol works by blocking the effects of certain natural chemicals in your body, like adrenaline, on the heart and blood vessels. This helps to slow down the heart rate and lower blood pressure. It also helps to make the heart beat more regularly.
Atenolol is a beta-blocker that mainly affects the heart. It works by blocking the effects of certain chemicals in your body that raise heart rate and blood pressure. This helps your heart beat slower and with less force, lowering blood pressure.
No common side effects listed.
- • Dizziness
- • Tiredness
- • Fatigue
- • Diarrhea
- • Nausea
- Problems with thinking or memory 620
- Falling down 615
- Low blood pressure when standing up 573
- Problems with balance 568
- Difficulty passing stools 565
- The medicine is not working 7,900
- Feeling sick to your stomach 7,812
- Feeling very tired 7,573
- Loose, watery stools 6,995
- Difficulty breathing 6,277
You should not take acebutolol if you have a very slow heart rate, second- or third-degree heart block, heart failure, or cardiogenic shock.
You should not take atenolol if you have a very slow heart rate, a serious heart block, cardiogenic shock, or heart failure. Atenolol can make these conditions worse. Tell your doctor right away if you feel dizzy or lightheaded, or if your heart rate becomes very slow.
Tell your doctor if you are pregnant or plan to become pregnant. It is not known if acebutolol will harm an unborn baby. Talk to your doctor about the risks and benefits of taking acebutolol while breastfeeding.
Tell your doctor if you are pregnant or plan to become pregnant. It is not known if atenolol will harm your unborn baby. Talk to your doctor about the risks and benefits of taking atenolol while pregnant or breastfeeding.
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How to Read This acebutolol vs atenolol Comparison
acebutolol is classified in the Beta-1 Selective Blocker with ISA drug class, while atenolol sits within the Beta-1 Selective 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, acebutolol has 2,941 submissions while atenolol has 36,557. Those figures reflect cumulative reporting volume — not per-patient risk — so older, widely dispensed drugs typically look worse on count alone. No direct interaction between these two drugs is listed in our FDA-derived dataset, though co-prescription still warrants pharmacist review. 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 acebutolol and atenolol — 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.