What are the possible side effects of methenamine (Hiprex, Mandelamine, Urex)?
If you experience any of the following serious side effects, stop taking methenamine and seek emergency medical attention or contact your doctor immediately:
- an allergic reaction (shortness of breath; closing of the throat; swelling of the lips, face, or tongue; or hives;
- lower back or side pain;
- blood in urine; or
- increasingly painful or difficult urination.
Other, less serious side effects may be more likely to occur. Continue to take methenamine and talk to your doctor if you experience
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What are the precautions when taking methenamine hippurate (Hiprex)?
Before taking methenamine, tell your doctor or pharmacist if you are allergic to it; or to formaldehyde; 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.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: kidney problems, liver problems, dehydration.
Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.
This drug passes into breast milk and the effect on a...
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