Pronunciation: meh-TOLE-uh-ZONE
Generic Name: Metolazone
Brand Name: Zaroxolyn
Zaroxolyn is used for:
Treating high blood pressure. It may be used with other high blood pressure medicines. It may also be used for other conditions as determined by your doctor.
Zaroxolyn is a quinazoline diuretic with actions similar to thiazide type diuretics (eg, hydrochlorothiazide). It works by causing the kidneys to eliminate certain chemicals, which in turn allow large amounts of water to be eliminated.
Do NOT use Zaroxolyn if:
- you are allergic to any ingredient in Zaroxolyn
- you are unable to urinate
- you have precoma or are in a coma caused by severe liver disease
Contact your doctor or health care provider right away if any of these apply to you.
Before using Zaroxolyn:
Some medical conditions may interact with Zaroxolyn. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:
- if you are pregnant, planning to become pregnant, or are breast-feeding
- if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
- if you have allergies to medicines, foods, or other substances
- if you have lupus, kidney or liver disease, low blood sodium or potassium levels, or gout
Some MEDICINES MAY INTERACT with Zaroxolyn. Tell your health care provider if you are taking any other medicines, especially any of the following:
- Nonsteroidal antiinflammatory drugs (NSAIDs) (eg, ibuprofen, naproxen) because they may decrease Zaroxolyn's effectiveness
- Angiotensin-converting enzyme (ACE) inhibitors (eg, enalapril), diazoxide, ketanserin, loop diuretics (eg, furosemide), NSAIDs (eg, ibuprofen, naproxen) because side effects, such as kidney problems, may occur
- ACE inhibitors (eg, enalapril), allopurinol, amantadine, antineoplastic agents (eg, cyclophosphamide), diazoxide, digitalis glycosides (eg, digoxin), ketanserin, lithium, loop diuretics (eg, furosemide), or nondepolarizing muscle relaxants (eg, vecuronium) because the risk of their side effects may be increased by Zaroxolyn
This may not be a complete list of all interactions that may occur. Ask your health care provider if Zaroxolyn may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.
How to use Zaroxolyn:
Use Zaroxolyn as directed by your doctor. Check the label on the medicine for exact dosing instructions.
- Take Zaroxolyn by mouth with or without food. If stomach upset occurs, take with food to reduce stomach irritation.
- Zaroxolyn may increase the amount of urine or cause you to urinate more often when you first start taking it. To keep this from disturbing your sleep, try to take your dose before 6 pm.
- If you miss a dose of Zaroxolyn, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.
Ask your health care provider any questions you may have about how to use Zaroxolyn.
Important safety information:
- Zaroxolyn may cause drowsiness, dizziness, blurred vision, or lightheadedness. These effects may be worse if you take it with alcohol or certain medicines. Use Zaroxolyn with caution. Do not drive or perform other possibly unsafe tasks until you know how you react to it.
- Zaroxolyn may cause dizziness, lightheadedness, or fainting; alcohol, hot weather, exercise, or fever may increase these effects. To prevent them, sit up or stand slowly, especially in the morning. Sit or lie down at the first sign of any of these effects.
- Zaroxolyn may cause you to become sunburned more easily. Avoid the sun, sunlamps, or tanning booths until you know how you react to Zaroxolyn. Use a sunscreen or wear protective clothing if you must be outside for more than a short time.
- Do not change brands of Zaroxolyn without talking to your doctor. Products made by other companies may not work as well for you.
- Check with your doctor before you use a salt substitute or a product that has potassium in it.
- Lab tests, including liver function, kidney function, and complete blood cell counts, may be performed while you use Zaroxolyn. These tests may be used to monitor your condition or check for side effects. Be sure to keep all doctor and lab appointments.
- Zaroxolyn should be used with extreme caution in CHILDREN; safety and effectiveness in children have not been confirmed.
- PREGNANCY and BREAST-FEEDING: If you become pregnant, contact your doctor. You will need to discuss the benefits and risks of using Zaroxolyn while you are pregnant. Zaroxolyn is found in breast milk. Do not breast-feed while taking Zaroxolyn.
Possible side effects of Zaroxolyn:
All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:
Abnormal skin sensations; constipation; diarrhea; dizziness; feeling of a whirling motion; headache; impotence; joint pain; lightheadedness; loss of appetite; nausea; purple patches under the skin; skin sensitivity to sunlight; stomach bloating; stomach pain.
Seek medical attention right away if any of these SEVERE side effects occur:
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); chest pain/discomfort; depression; drowsiness; dry mouth; fainting; gout attacks; lightheadedness when rising from a seated position; muscle pain or cramps; rapid or irregular heartbeat; restlessness; unusual thirst; unusual tiredness or weakness; vomiting; yellowing of the skin or eyes.
This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. To report side effects to the appropriate agency, please read the Guide to Reporting Problems to FDA.
See also: Zaroxolyn side effects (in more detail)
If OVERDOSE is suspected:
Contact 1- 800-222-1222 (the American Association of Poison Control Centers), your local poison control center, or emergency room immediately. Symptoms may include dizziness; drowsiness; dry mouth; excessive urination followed by a decrease in amount of urine; fainting; irregular or weak heartbeat; lightheadedness when rising from a seated position; muscle cramps.
Proper storage of Zaroxolyn:
Store Zaroxolyn at room temperature, between 68 and 77 degrees F (20 and 25 degrees C). Store away from heat, moisture, and light. Do not store in the bathroom. Keep Zaroxolyn out of the reach of children and away from pets.
General information:
- If you have any questions about Zaroxolyn, please talk with your doctor, pharmacist, or other health care provider.
- Zaroxolyn is to be used only by the patient for whom it is prescribed. Do not share it with other people.
- If your symptoms do not improve or if they become worse, check with your doctor.
- Check with your pharmacist about how to dispose of unused medicine.
This information is a summary only. It does not contain all information about Zaroxolyn. If you have questions about the medicine you are taking or would like more information, check with your doctor, pharmacist, or other health care provider.
More Zaroxolyn resources
- Zaroxolyn Side Effects (in more detail)
- Zaroxolyn Use in Pregnancy & Breastfeeding
- Drug Images
- Zaroxolyn Drug Interactions
- Zaroxolyn Support Group
- 1 Review for Zaroxolyn - Add your own review/rating
- Zaroxolyn Advanced Consumer (Micromedex) - Includes Dosage Information
- Zaroxolyn Concise Consumer Information (Cerner Multum)
- Zaroxolyn Monograph (AHFS DI)
- Zaroxolyn Prescribing Information (FDA)
- Metolazone Professional Patient Advice (Wolters Kluwer)
- Metolazone Prescribing Information (FDA)
- Mykrox Prescribing Information (FDA)
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