Chlorthalidone works by increasing the amount of urine you make, especially when you first start taking it. Over time, chlorthalidone also works to relax your blood vessel walls.

Increasing the amount of urine you make lowers the amount of salt and fluid in your body. Lowering the amount of fluid pumping through your blood vessels helps to lower your blood pressure.

Relaxing your blood vessel walls allows blood to flow more easily which also leads to lower blood pressure.

Remember that high blood pressure means there is too much pressure in your body’s blood vessels. Over time, this high pressure can cause damage to your organs such as your heart, your brain, and your kidneys.

So, chlorthalidone works first by lowering the body’s salt and water. Then, over time it relaxes your blood vessels.

Less Pressure, More Health!