Mesna: Uses, Side Effects & Warnings

Pregnancy & Lactation: Risk data not available

What is Mesna?

Mesna is used to prevent bleeding in the bladder (hemorrhagic cystitis) during chemotherapy with ifosfamide (Ifex).

Mesna will not prevent other side effects caused by ifosfamide.

Mesna may also be used for purposes not listed in this medication guide.

Warnings

You should not use this medicine if you are allergic to mesna, edetate sodium, sodium hydroxide, or benzyl alcohol.

Tell your doctor if you are allergic to any medicine.

Although mesna is not expected to harm an unborn baby, ifosfamide can harm an unborn baby if the mother or the father is using this medicine.

  • If you are a woman, you may need to have a negative pregnancy test before starting this treatment with ifosfamide. Use effective birth control to prevent pregnancy while you are using ifosfamide and for at least 6 months after your last dose.
  • If you are a man, use effective birth control if your sex partner is able to get pregnant. Keep using birth control for at least 3 months after your last dose of ifosfamide.
  • Tell your doctor right away if a pregnancy occurs while either the mother or the father is using ifosfamide.

Do not breast-feed while using mesna or ifosfamide, and for at least 1 week after your last dose.

Mesna injection contains an ingredient that can cause serious side effects or death in premature or low-birthweight babies. Mesna tablets do not contain this ingredient. Mesna injection should not be given to a premature or low birth weight infant.

How should I use Mesna

Use Mesna (Mesnex) exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended.

Before and during treatment with mesna, you may need frequent urine tests.

Follow all directions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed.

Mesna injection is given as an infusion into a vein. A healthcare provider will give you this injection at the same time you receive ifosfamide.

Oral mesna is taken by mouth, usually 2 and 6 hours after you receive ifosfamide.

Mesna is given either in a series of 3 injections spaced 4 hours apart, or as a single injection followed by 2 oral doses spaced 2 and 6 hours later.

Follow your doctor's dosing instructions very carefully.

Call your doctor if you vomit within 2 hours after taking oral mesna. You may need to take another oral dose or receive a mesna injection.

Tell your doctor if you have red or pink colored urine. This may be a sign that your ifosfamide dose needs to be changed.

Drink at least 1 to 2 liters (32 to 64 ounces) of liquid each day while you are using mesna.

This medicine can affect the results of certain medical tests. Tell any doctor who treats you that you are using mesna.

Store mesna tablets at room temperature away from moisture and heat.

What should I do if I missed a dose of Mesna (Mesnex)?

Call your doctor for instructions if you miss a dose of mesna.

Mesna side effects

Get emergency medical help if you have signs of an allergic reaction or severe skin reaction:

  • fever, nausea, vomiting, joint or muscle pain;
  • hives, rash or redness, skin pain or swelling, blisters or peeling;
  • feeling light-headed, trouble breathing;
  • racing heartbeats; or
  • mouth sores, or swelling in your face or throat.

Call your doctor at once if you have:

  • chest pain, trouble breathing;
  • easy bruising or bleeding (nosebleeds, bleeding gums);
  • low red blood cells (anemia)--pale skin, unusual tiredness, feeling light-headed or short of breath, cold hands and feet; or
  • low potassium level--leg cramps, constipation, irregular heartbeats, fluttering in your chest, increased thirst or urination, numbness or tingling, muscle weakness or limp feeling.

Common side effects may include:

  • nausea, vomiting, stomach pain, loss of appetite;
  • diarrhea, constipation;
  • weakness, tiredness, drowsiness;
  • headache;
  • hair loss; or
  • fever, flu-like symptoms.

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.

What other drugs will affect Mesna?

Follow your doctor's instructions about any restrictions on food, beverages, or activity.

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