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Zaroxolyn Oral

Generic Name: METOLAZONE - ORAL
Pronounced: (me-TOLE-a-zone)

Zaroxolyn Oral Side Effects

Dizziness, lightheadedness, headache, blurred vision, loss of appetite, stomach upset, diarrhea, or constipation may occur as your body adjusts to the medication. If any of these effects persist or worsen, notify your doctor or pharmacist promptly.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

This medication may lead to excessive loss of body water and minerals (including potassium). Tell your doctor immediately if you have any of these unlikely but serious symptoms of dehydration or mineral loss:

  • muscle cramps or weakness
  • confusion
  • severe dizziness
  • unusual dry mouth or thirst
  • nausea or vomiting
  • fast/irregular heartbeat
  • unusual decrease in the amount of urine
  • fainting
  • seizures


Tell your doctor immediately if any of these unlikely but serious side effects occur:

  • numbness/tingling of the arms/legs
  • decreased sexual ability


Tell your doctor immediately if any of these highly unlikely but very serious side effects occur:

  • persistent sore throat or fever
  • easy bleeding or bruising
  • stomach/abdominal pain
  • persistent nausea/vomiting
  • yellowing of eyes/skin


A serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction include:

  • rash
  • itching/swelling (especially of the face/tongue/throat)
  • severe dizziness
  • trouble breathing


This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

Zaroxolyn Oral Precautions

Before taking metolazone, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have:

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