- High Blood Pressure Slideshow Pictures
- Take the Salt Quiz!
- Lowering Blood Pressure Exercise Tips Pictures
What is metolazone, and how does it work (mechanism of action)?
Metolazone is a diuretic ("water pill") used in the treatment of high blood pressure and fluid accumulation. It works by blocking salt and fluid retention by the kidneys, thereby increasing urinary output of salt and water (diuresis). Although it is not a true thiazide, metolazone is chemically related to the thiazide class of diuretics (for example, chlorthalidone [Hygroton], hydrochlorothiazide), and works in a similar manner. Zaroxolyn is the original formulation of metolazone, and Diulo is similar. The absorption of these two drugs is relatively incomplete. Mykrox has more complete absorption. Therefore, less Mykrox needs to be given to have the same effects as a larger dose of Zaroxolyn or Diulo. Metolazone was approved by the FDA in 1973.
What brand names are available for metolazone?
Is metolazone available as a generic drug?
Do I need a prescription for metolazone?
What are the side effects of metolazone?
Metolazone generally is well tolerated. Common side effects of metolazone are:
- Hypokalemia (low blood potassium),
- (low blood sodium), and
- hypomagnesemia (low blood magnesium).
- Hypercalcemia (high blood calcium)
Thiazide diuretics, which are chemically related to metolazone, are known to increase the amount of uric acid in the blood. Precipitation of gout (which is associated with high uric acid) is rare. Metolazone can increase blood sugar in people with diabetes.
What is the dosage for metolazone?
The recommended dose is 2.5 to 5 mg for hypertension and 2.5-20 mg for treating edema.
Which drugs or supplements interact with metolazone?
Metolazone can reduce blood potassium and magnesium levels. This is especially true in patients who also are taking "loop" diuretics such as furosemide (Lasix), bumetanide (Bumex), and torsemide (Demadex ). Low potassium and magnesium levels can lead to heart rhythm abnormalities, especially in patients taking digoxin (Lanoxin). Metolazone reduces excretion of lithium (Lithobid, Eskalith) by the kidneys and can lead to lithium toxicity in patients receiving lithium. Steroids (for example, hydrocortisone) and nonsteroidal anti-inflammatory agents (NSAIDs) such as ibuprofen (Motrin), naproxen (Naprosyn), and nabumetone (Relafen) can reduce the effectiveness of metolazone by interfering with the excretion of salt and water.
Latest High Blood Pressure News
Is metolazone safe to take if I'm pregnant or breastfeeding?
Metolazone should not be used during pregnancy unless absolutely necessary.
Metolazone is excreted in breast-milk. Intense diuresis using metolazone may reduce the production of milk. Otherwise metolazone is considered safe to use during nursing if required by the mother.
Metolazone (Zaroxolyn) is a medication prescribed for the treatment of high blood pressure and edema. Side effects, drug interactions, dosage, and pregnancy safety information should be reviewed prior to taking this medication.
Multimedia: Slideshows, Images & Quizzes
Related Disease Conditions
High Blood Pressure (Hypertension) Signs, Causes, Diet, and Treatment
High blood pressure (hypertension) is a disease in which pressure within the arteries of the body is elevated. About 75 million...
12 Congestive Heart Failure Symptoms, Stages, Causes, and Life Expectancy
Congestive heart failure (CHF) refers to a condition in which the heart loses the ability to function properly. Heart disease,...
Edema is the swelling of tissues as a result of excess water accumulation. Peripheral edema occurs in the feet and legs. There...
High Blood Pressure Treatment (Natural Home Remedies, Diet, Medications)
High blood pressure (hypertension) means high pressure (tension) in the arteries. Treatment for high blood pressure include...
Febrile seizures, or convulsions caused by fever, can be frightening in small children or infants. However, in general, febrile...
Treatment & Diagnosis
- Drugs: The Most Common Medication Errors
- Medication Disposal
- Dangers of Mixing Medications
- How To Reduce Your Medication Costs
- Pharmacy Visit, How To Get The Most Out of Your Visit
- Indications for Drugs: Approved vs. Non-approved
- Drugs: Buying Prescription Drugs Online Safely
- Generic Drugs, Are They as Good as Brand-Names?
Medications & Supplements
Prevention & Wellness
Health Solutions From Our Sponsors
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
FDA Prescribing Information