High blood pressure is one of the most common health problems in the world. Millions of people take daily medicine to control it and reduce the risk of heart attacks and strokes.
These medicines are usually considered safe and effective. However, a new study from Europe has raised concerns about one widely used drug and its possible link to a serious heart condition.
The condition is called sudden cardiac arrest. This happens when the heart suddenly stops pumping blood properly. When this occurs, the brain and other vital organs do not receive enough oxygen. A person can quickly lose consciousness and stop breathing normally. Without immediate help, such as CPR or a defibrillator, death can happen within minutes.
Sudden cardiac arrest is more common than many people think. In Europe, it is responsible for about half of all heart-related deaths and around one in five natural deaths. It often happens without warning, although some people may feel symptoms like chest pain, shortness of breath, or nausea shortly before it occurs.
In this new study, researchers focused on two common drugs used to treat high blood pressure and chest pain. These drugs are nifedipine and amlodipine. Both belong to a group of medicines called calcium channel blockers. They work by relaxing blood vessels, which helps lower blood pressure and improve blood flow to the heart.
These drugs have been used for many years and are taken by millions of people around the world. Because of their long history, they are generally seen as safe. However, the researchers wanted to take a closer look at whether these medicines could be linked to sudden cardiac arrest.
To do this, they studied data from 2,503 people who had experienced sudden cardiac arrest. They compared these patients with 10,543 healthy individuals from a large health database in Amsterdam. By comparing the two groups, the researchers aimed to see if certain medications were more common among those who had suffered the condition.
The results showed something unexpected. People who were taking a high dose of nifedipine, defined as 60 milligrams per day, had a higher risk of sudden cardiac arrest compared to those who were not taking the drug. In contrast, the other drug, amlodipine, did not show the same increased risk.
To make sure their findings were reliable, the researchers repeated the analysis using data from another large group in Denmark. This second group included 8,101 patients who had experienced sudden cardiac arrest and 40,505 healthy individuals. The results were similar. Again, high doses of nifedipine were linked to a higher risk, while amlodipine was not.
This finding is surprising because nifedipine has been used for a long time without major safety concerns. One reason this risk may not have been noticed before is that sudden cardiac arrest is very difficult to study. It happens quickly and often leads to death, which makes it hard for researchers to collect detailed information.
The researchers believe that more studies are needed to fully understand this link. They do not suggest that people should stop taking nifedipine right away. Instead, they recommend that patients talk with their doctors before making any changes to their medication.
Doctors may need to carefully consider the dose of nifedipine they prescribe, especially for patients who may already have a higher risk of heart problems. In some cases, it may be possible to use a lower dose or switch to another medication, such as amlodipine, depending on the patient’s condition.
This study is an important reminder that even well-known medicines can have risks that are not fully understood. Medical knowledge continues to grow over time, and new research can help improve how we use treatments safely.
For patients, the key message is to stay informed and communicate openly with healthcare providers. Managing blood pressure is very important for long-term health, but it is also important to make sure that the chosen treatment is the safest option available.
The study was carried out by European researchers and published in the European Heart Journal. It adds new insight into the safety of a commonly used drug and highlights the need for careful use, especially at higher doses.
As more research is done, doctors and patients will be better able to make informed decisions. Until then, awareness and discussion are the best tools for reducing risk and protecting heart health.
If you care about high blood pressure, please read studies about breakfast for better blood pressure management, and the gut feeling that lowers blood pressure.
For more health information, please see recent studies about how the dash diet helps lower blood pressure, and how to eat your way to healthy blood pressure.
Copyright © 2026 Knowridge Science Report. All rights reserved.
