Urex

Medical Editor: John P. Cunha, DO, FACOEP Last updated on RxList: 4/27/2022
Urex Side Effects Center

What Is Urex?

Urex (methenamine hippurate) is a urinary tract antiseptic drug used to treat and prevent urinary tract infections. Urex is available in generic form.

What Are Side Effects of Urex?

Common side effects of Urex include:

Tell your doctor if you have unlikely but serious side effects of Urex including:

Dosage for Urex

The dose of Urex for adults and children over 12 years of age is 1 tablet (1 g) twice daily, and one-half tablet or one tablet (0.5 or 1 g) twice daily for children 6 to 12 years of age.

What Drugs, Substances, or Supplements Interact with Urex?

Urex may interact with carbonic anhydrase inhibitors, sulfa drugs, diuretics (water pills), or products containing aluminum, calcium, magnesium, sodium bicarbonate, potassium or sodium citrate, or citric acid (such as antacids, vitamin or mineral pills, urinary alkalinizers, and other medications). Tell your doctor all medications and supplements you use.

Urex During Pregnancy or Breastfeeding

During pregnancy, Urex should be used only when prescribed. This drug passes into breast milk and the effect on a nursing infant is unknown. Consult your doctor before breastfeeding.

Additional Information

Our Urex (methenamine hippurate) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

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Urex Consumer Information

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have:

  • increased urination;
  • painful urination;
  • blood in your urine; or
  • swelling, shortness of breath.

Common side effects may include:

  • painful urination;
  • nausea, vomiting; or
  • rash, itching.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Read the entire detailed patient monograph for Urex (Methenamine Hippurate)

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Urex Professional Information

SIDE EFFECTS

Adverse effects of UREX (methenamine hippurate) have been reported in fewer than 3.5% of patients treated.

These reactions have included the following, in decreasing order of frequency: nausea, vomiting, and rarely puritus, rash, dysuria.

Children have received UREX (methenamine hippurate) at the recommended dosages as a prophylactic/suppressive regimen after initial treatment of acute episodes of pyuria. Side effects were encountered in only 1.1% of these children.

Read the entire FDA prescribing information for Urex (Methenamine Hippurate)

© Urex Patient Information is supplied by Cerner Multum, Inc. and Urex Consumer information is supplied by First Databank, Inc., used under license and subject to their respective copyrights.

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