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Arsenic Trioxide Injection

What is this medication?

ARSENIC TRIOXIDE (AR se nik trye OX ide) treats leukemia. It works by slowing down the growth of cancer cells.

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This medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions.

COMMON BRAND NAME(S): Trisenox

What should I tell my care team before I take this medication?

They need to know if you have any of these conditions:

  • Alcohol use
  • Heart disease
  • Heart failure
  • High or low levels of electrolytes, such as magnesium or potassium, in your blood
  • Irregular heartbeat or rhythm
  • Kidney disease
  • Liver disease
  • Slow heartbeat
  • An unusual or allergic reaction to arsenic, other medications, foods, dyes, or preservatives
  • If you or your partner are pregnant or trying to get pregnant
  • Breastfeeding

How should I use this medication?

This medication is infused into a vein. It is given by your care team in a hospital or clinic setting.

Talk to your care team about the use of this medication in children. While it may be prescribed for children as young as 4 years for selected conditions, precautions do apply.

Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once.

NOTE: This medicine is only for you. Do not share this medicine with others.

What if I miss a dose?

Keep appointments for follow-up doses. It is important not to miss your dose. Call your care team if you are unable to keep an appointment.

What may interact with this medication?

Do not take this medication with any of the following:

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  • Dengue vaccine
  • Dronedarone
  • Ketoconazole
  • Levoketoconazole
  • Pimozide
  • Thioridazine
  • Ziprasidone

This medication may also interact with the following:

  • Diuretics
  • Other medications that cause heart rhythm changes
  • Steroid medications, such as prednisone or cortisone

This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.

What should I watch for while using this medication?

Your condition will be monitored carefully while you are receiving this medication.

This medication may make you feel generally unwell. This is not uncommon as chemotherapy can affect healthy cells as well as cancer cells. Report any side effects. Continue your course of treatment even though you feel ill unless your care team tells you to stop.

You may need blood work done while you are taking this medication. Your care team may also give you a test called an electrocardiogram (ECG) to check your heart before and during treatment.

Talk to your care team about your risk of cancer. You may be more at risk for certain types of cancer if you take this medication.

Talk to your care team if you or your partner may be pregnant. Serious birth defects can occur if you take this medication during pregnancy and for 6 months after the last dose. You will need a negative pregnancy test before starting this medication. Contraception is recommended while taking this medication and for 6 months after the last dose. Your care team can help you find the option that works for you.

If your partner can get pregnant, use a condom during sex while taking this medication and for 3 months after the last dose. Tell your care team right away if you think your partner might be pregnant. This medication can cause serious birth defects.

Do not breastfeed while taking this medication and for 2 weeks after the last dose.

This medication may cause infertility. Talk to your care team if you are concerned about your fertility.

What side effects may I notice from receiving this medication?

Side effects that you should report to your care team as soon as possible:

  • Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat
  • Dizziness, loss of balance or coordination, confusion or trouble speaking
  • Fever, cough, dizziness, feeling faint or lightheaded, shortness of breath, bone pain, sudden weight gain, swelling of the ankles, hands, or feet, which may be signs of differentiation syndrome
  • Heart rhythm changes—fast or irregular heartbeat, dizziness, feeling faint or lightheaded, chest pain, trouble breathing
  • High white blood cell level—fever, fatigue, trouble breathing, night sweats, change in vision, weight loss
  • Infection—fever, chills, cough, sore throat, wounds that don't heal, pain or trouble when passing urine, general feeling of discomfort or being unwell
  • Liver injury—right upper belly pain, loss of appetite, nausea, light-colored stool, dark yellow or brown urine, yellowing skin or eyes, unusual weakness or fatigue
  • Uncontrollable eye movements
  • Unusual bruising or bleeding

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Side effects that usually do not require medical attention (report these to your care team if they continue or are bothersome):

  • Constipation
  • Diarrhea
  • Fatigue
  • Headache
  • Nausea
  • Stomach pain
  • Vomiting

This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Where should I keep my medication?

This medication is given in a hospital or clinic. It will not be stored at home.

NOTE: This sheet is a summary. It may not cover all possible information. If you have questions about this medicine, talk to your doctor, pharmacist, or health care provider.

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Note: Introduction and Additional Common Questions written and medically approved by Cleveland Clinic professionals.

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