Aldactone Medication Information:

Price Break On Aldactone
Generic is available for less money: Generic Spironolactone

Aldactone medication comes in several different strengths; click on the strength you need to view prices from pharmacies competing to earn your business.

Aldactone 25 mg
Aldactone 50 mg
Aldactone 100 mg

About Aldactone

What Aldactone is used for

  • Fluid retention (edema) caused by various conditions, including heart disease, cirrhosis of the liver and nephrotic syndrome;

  • High blood pressure;

  • Hyperaldosteronism (the body produces too much aldoterone, a naturally occurring hormone);

  • Low potassium levels in the blood (hypokalemia).

What Aldactone does

Spironolactone is in a class of medications called aldosterone receptor antagonists. It causes the kidney to eliminate unneeded water and sodium from the body into the urine, but reduces the loss of potassium from the body.

When Aldactone should not be used

You should not use this medicine if you have had an allergic reaction to spironolactone, or if you have certain kidney diseases, high levels of potassium in your blood (hyperkalemia), or if you are pregnant or unable to urinate.

What the medicinal ingredient is


What the important nonmedicinal ingredients for Aldactone are

Each ALDACTONE 25 mg and 100 mg tablet contains: calcium sulfate, corn starch, magnesium stearate, peppermint flavouring, povidone, hypromellose, polyethylene glycol 400, carnauba wax, stearic acid, opaspray M-1-2042 (25 mg only) and opaspray M-1-2668 (100 mg only).

What dosage forms Aldactone comes in


Each light yellow, round, biconvex, film-coated tablet, debossed “ALDACTONE” and “25” on one face and “SEARLE” and “1001” on the other face and with peppermint odour contains Spironolactone 25 mg.


Each peach, round, biconvex, scored, film-coated tablet, debossed “ALDACTONE” and “100” on one face and “SEARLE” and “1031” on the other (scored) face and with peppermint odour contains Spironolactone 100 mg.

ALDACTONE tablets are available in strengths of 25 mg and 100 mg in bottles of 100.

Warnings and Precautions

Avoid potassium supplements and foods containing high levels of potassium including salt substitutes.

Before taking ALDACTONE,

  • tell your doctor and pharmacist if you are allergic to spironolactone, sulfa drugs, or any other drugs;

  • tell your doctor and pharmacist what prescription and nonprescription medications you are taking, especially aspirin; lithium; medications for arthritis, diabetes, or high blood pressure; potassium supplements; and vitamins;

  • tell your doctor if you have or have ever had diabetes, gout, or kidney or liver disease;

  • tell your doctor if you are pregnant, plan to become pregnant, or are breast feeding. If you become pregnant while taking spironolactone, call your doctor immediately;

  • if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking spironolactone;

  • you should know that this drug may make you drowsy or dizzy. Do not drive a car or operate machinery, or do anything else that could be dangerous if you are not alert until you know how this drug affects you. Remember that alcohol can add to the drowsiness caused by this drug.

Dietary Restrictions

Follow your doctor's directions for a low-salt or low-sodium diet and daily exercise program. Avoid potassium-containing salt substitutes. Limit your intake of potassium-rich foods (eg, bananas, prunes, raisins, and orange juice). Ask your doctor for advice on how much of these foods you may have.

Interactions with Aldactone

Drugs that may interact with ALDACTONE include: aspirin, lithium, digoxin, antipyrine, cholestyramine, and medications for arthritis, diabetes, or high blood pressure.

Proper Use of Aldactone

Usual dose

ALDACTONE comes as a tablet to take by mouth. Take it exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor. It usually is taken once a day in the morning with breakfast or twice a day with breakfast and lunch. Carefully follow your doctor's instructions about any special diet.

Missed dose

Take the missed dose as soon as you remember it. If it is almost time for your next dose, wait until then to take the medicine and skip the missed dose. Do not take a double dose to make up for a missed one.

Side Effects for Aldactone and What to Do About Them

Although side effects from ALDACTONE are not common, they can occur. Tell your doctor if any of these symptoms do not go away:

  • upset stomach

  • abdominal pain

  • frequent urination

  • dryness of mouth, thirst

Serious Side Effects, How Often They Happen and What to Do About Them
Symptom/Effect Talk with your doctor or pharmacist Stop taking drug and call your doctor or pharmacist
Only if severe In all cases
Enlarged or painful breasts    
Irregular menstrual period    
Muscle weakness or cramps    
Rapid, excessive weight loss    
Rapid, slow or irregular heartbeat    
Shortness of breath    
Unusual bruising or bleeding    
Yellowing of the skin or eyes    
Skin rash    
Vomiting blood    

This is not a complete list of side effects. If you have any unexpected effects after receiving ALDACTONE, contact your doctor or pharmacist.


Technical Information