6 doctors weighed in:

How do water pills (diuretics) work to lower blood pressure?

6 doctors weighed in
Dr. RAMESH KAUL
Internal Medicine - Pulmonary Critical Care
2 doctors agree

In brief: Diuresis

They act on the tubular part of the microscopic nephron in the kidney which filters out water and prevents reabsorption of that water in various parts of the tubule.
Then this return blood deprived of water again circulates through the skin releases a plasma and it is avid for water and sucks it back.

In brief: Diuresis

They act on the tubular part of the microscopic nephron in the kidney which filters out water and prevents reabsorption of that water in various parts of the tubule.
Then this return blood deprived of water again circulates through the skin releases a plasma and it is avid for water and sucks it back.
Dr. RAMESH KAUL
Dr. RAMESH KAUL
Thank
Dr. Joseph Roosth
Internal Medicine
2 doctors agree

In brief: Removal of fluid

Simple answer is that by removing excess fluid, the blood pressure is lowered.
Some diuretics also have effects on the blood vessel walls causing them to dilate. Imagine a baloon with a gallon of water in it. Then remove 1/2 the water. The pressure inside the baloon is less. That is an oversimplification, but not completely.

In brief: Removal of fluid

Simple answer is that by removing excess fluid, the blood pressure is lowered.
Some diuretics also have effects on the blood vessel walls causing them to dilate. Imagine a baloon with a gallon of water in it. Then remove 1/2 the water. The pressure inside the baloon is less. That is an oversimplification, but not completely.
Dr. Joseph Roosth
Dr. Joseph Roosth
Thank
1 comment
Dr. Rodolfo Pascual
Diuretics also remove sodium (salt) from the body and diuretics work better when salt intake is also restricted.
Get help from a real doctor now
Dr. Vicken Poochikian
Board Certified, Internal Medicine
38 years in practice
2M people helped
Continue
108,000 doctors available
Read more answers from doctors