Skip to content
My WebMD Sign In, Sign Up

Heart Failure Health Center

Font Size

Heart Failure Treatment With Potassium and Magnesium Supplements

Potassium and magnesium are important in controlling blood pressure. They are often prescribed to heart patients taking diuretics, or ''water pills.'' They replace fluids lost through increased urination caused by diuretics.

Potassium supplements include:

Recommended Related to Heart Failure

Edema Overview

Edema is the medical term for swelling. It is a general response of the body to injury or inflammation. Edema can be isolated to a small area or affect the entire body. Medications, infections, pregnancy, and many medical problems can cause edema. Edema results whenever small blood vessels become "leaky" and release fluid into nearby tissues. The extra fluid accumulates, causing the tissue to swell.

Read the Edema Overview article > >

  • Kaochlor 10%
  • Kaon CL
  • Kay Ciel
  • K-Lor
  • Klotrix
  • K-Lyte
  • Slow-K
  • K-Dur

Magnesium supplements include:

  • Mag-Ox
  • Uro-Mag

How Do I Take Potassium and Magnesium Supplements?

Take potassium and magnesium supplements right after meals or with food. Follow the label directions on how often to take it. The number of doses you take each day, the time allowed between doses, and how long you need to take it will depend on the type of medication prescribed, as well as your condition.

What Are the Side Effects of Potassium and Magnesium Supplements?

Possible side effects of potassium and magnesium supplements include:

  • Nausea, vomiting, diarrhea, and abdominal discomfort.; take the medication with food or right after meals with a full glass of water or fruit juice. If these side effects continue, contact your doctor. If you take controlled-release tablets or capsules and experience severe vomiting or vomit blood and abdominal pain or swelling, stop taking the medication and contact your doctor right away.
  • Black, tarry, or bloody stools (signs of stomach bleeding); contact your doctor right away.
  • Confusion; irregular or slow heartbeat; numbness or tingling in hands, feet, or lips; shortness of breath or difficult breathing; unexplained anxiety; unusual tiredness, or weakness. Contact your doctor right away.

Should I Avoid Certain Foods or Drugs While Taking Potassium and Magnesium?

If you are taking magnesium or potassium supplements, let your doctor know if:

  • You are using a salt substitute; many salt substitutes contain potassium. 
  • You are using ACE inhibitors or certain diuretics
  • You have a kidney disorder

 

Other Guidelines for Taking Potassium and Magnesium

  • While taking potassium or magnesium, have your blood pressure checked regularly, as advised by your doctor.
  • Keep all appointments with your doctor and the lab so that your response to the drug can be monitored.

 

 

WebMD Medical Reference

Reviewed by Thomas M. Maddox, MD on June 09, 2012

Today on WebMD

Compressed heart
Article
Salt Shockers
Slideshow
 
Inside A Heart Attack
Slideshow
lowering blood pressure
SLIDESHOW
 

Mechanical Heart
Article
Omega 3 Overview Slideshow
Slideshow
 
Atrial Fibrillation Guide
Slideshow
Simple Steps to Lower Cholesterol
Slideshow
 

Compressed heart
Article
FAQ Heart Failure
Article
 
Cholesterol Confusion
Health Check
Resolved To Quit Smoking
Slideshow
 

WebMD Special Sections