Chlorthalidone is a common medicine that helps many people lower their blood pressure. It works well for many, but new research from Columbia University shows that it may come with some hidden risks that patients should know about.
First, let’s understand blood pressure. Imagine your blood vessels are like roads and your blood is like cars. If the cars move too fast, they can cause damage. That’s what high blood pressure does—it puts stress on your heart, kidneys, and brain. To help slow things down, doctors often use medications, and one of them is chlorthalidone.
In a large study, researchers followed more than 730,000 people for 17 years to learn more about how safe chlorthalidone is. They compared it with another common blood pressure drug called hydrochlorothiazide.
Both drugs help prevent heart problems, but the researchers found something surprising. People who took chlorthalidone were three times more likely to develop low potassium levels in their blood. This condition is called hypokalemia.
Potassium is an important mineral in the body. It helps your muscles work, keeps your heart beating normally, and supports many body functions. If you don’t have enough potassium, you might feel weak, tired, or even have serious heart problems.
Here’s what the study found: 6.3% of people taking chlorthalidone had low potassium, compared to only 1.9% of those taking hydrochlorothiazide. That’s a big difference.
The study also found that people on chlorthalidone were more likely to have other problems, such as issues with their kidneys and electrolytes. Electrolytes are like tiny chemical messengers that help your body do its job. Your kidneys help keep those chemicals in balance. If something goes wrong, it can lead to serious health problems.
This doesn’t mean that everyone who takes chlorthalidone will get sick. The medicine can still be helpful. But it does mean that people should be careful. If you’re using this drug, it’s important to visit your doctor regularly and get your blood tested. This can help catch any problems early and keep you safe.
There are also healthy habits that can help lower blood pressure. Eating more fruits and vegetables, using less salt, avoiding alcohol, and quitting smoking can all make a difference. Exercise—like walking, dancing, or doing yoga—can also help your heart. Managing stress by relaxing or meditating is another smart move.
The researchers at Columbia University say they will continue to study chlorthalidone and other medicines. Their goal is to help people stay healthy with the safest treatments available.
So if you take chlorthalidone, think of it like a tool that helps your blood flow better. Just make sure you also watch for signs from your body and listen to your doctor. That way, you can stay on the right track and keep your heart strong.
If you care about high blood pressure, please read studies about potatoes and high blood pressure, and top 10 choices for a blood pressure-friendly diet
For more information about high blood pressure, please see recent studies about impact of vitamins on high blood pressure you need to know, and the powerful link between high blood pressure and a potassium-rich diet.
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