Recent Blog Articles
Can long COVID affect the gut?
When replenishing fluids, does milk beat water?
Safe, joyful movement for people of all weights
Slowing down racing thoughts
Are women turning to cannabis for menopause symptom relief?
3 ways to create community and counter loneliness
Helping children make friends: What parents can do
Can electrical brain stimulation boost attention, memory, and more?
Palliative care frightens some people: Here’s how it helps
Parents don't always realize that their teen is suicidal
Low potassium levels from diuretics
Thiazide diuretics like hydrochlorothiazide (Esidrix, HydroDIURIL, other brands) continue to be a very effective way to lower blood pressure for people with hypertension. They're inexpensive, and results from large studies have shown them to be at least as effective as other types of blood pressure drugs for most patients.
But if you're taking a diuretic, your potassium levels need to be watched. These drugs direct the kidneys to pump water and sodium into the urine. Unfortunately, potassium also slips through the open floodgates. A low potassium level can cause muscle weakness, cramping, or an abnormal heartbeat, which is especially dangerous for people with heart problems.
Potassium pills are one solution, but some tend to taste bad, so people may neglect to take them. Eating foods rich in potassium, like bananas, may help, but often that's not enough. Spironolactone (Aldactone) and triamterene (Dyrenium) are diuretics that "spare" potassium, leaving levels high, but they're pretty weak as diuretics. Dyazide (available as a generic) is an attempt to strike a balance: It's part thiazide, part potassium-sparing diuretic.
Taking a potassium-sparing diuretic may be especially important if you have heart failure. Diuretics are often used to fight or prevent swelling in people with heart failure, but taking a potassium-sparing diuretic helps people with heart failure feel better, stay out of the hospital, and live longer. Heart failure patients taking the potassium-sparing diuretic are less likely to die or be hospitalized than those taking only regular diuretics.
As a service to our readers, Harvard Health Publishing provides access to our library of archived content. Please note the date of last review or update on all articles.
No content on this site, regardless of date, should ever be used as a substitute for direct medical advice from your doctor or other qualified clinician.
Free Healthbeat Signup
Get the latest in health news delivered to your inbox!