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Azacitidine Side Effects

Medically reviewed by Drugs.com. Last updated on Feb 17, 2025.

Applies to azacitidine: oral tablet.

Other dosage forms:

Precautions

It is very important that your doctor check your progress at regular visits to make sure this medicine is working properly. Blood tests may be needed to check for unwanted effects.

Using this medicine while you are pregnant can harm your unborn baby. If you are a woman who can bear children, your doctor may give you a pregnancy test before you start using this medicine to make sure you are not pregnant. This medicine may also cause birth defects if the father is using it when his sexual partner becomes pregnant. Female patients should use an effective form of birth control during treatment with this medicine and for at least 6 months after the last dose. Male patients who have female partners should use effective birth control during treatment with this medicine and for at least 3 months after the last dose. If you think you have become pregnant or your partner has become pregnant while using this medicine, tell your doctor right away.

Cancer medicines can cause nausea or vomiting in most people, sometimes even after receiving medicines to prevent it. Ask your doctor or nurse about other ways to control these side effects.

This medicine can temporarily lower the number of white blood cells in your blood, increasing the chance of getting an infection. It can also lower the number of platelets, which are necessary for proper blood clotting. If this occurs, there are certain precautions you can take, especially when your blood count is low, to reduce the risk of infection or bleeding:

If you plan to have children, talk with your doctor before using this medicine. Some men and women using this medicine have become infertile (unable to have children).

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or non-prescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.

Serious side effects of azacitidine

Along with its needed effects, azacitidine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking azacitidine:

More common side effects

  • black, tarry stools
  • bleeding gums
  • blood in urine or stools
  • chest pain or tightness
  • chills
  • cough
  • decreased appetite
  • diarrhea
  • difficulty in moving
  • dizziness
  • fever
  • lack or loss of strength
  • lower back or side pain
  • muscle pain or stiffness
  • nausea
  • pain in the arms or legs
  • pain in joints
  • painful or difficult urination
  • pale skin
  • pinpoint red spots on skin
  • sneezing
  • sore throat
  • stomach pain
  • trouble breathing
  • ulcers, sores, or white spots in the mouth
  • unusual bleeding or bruising
  • unusual tiredness or weakness
  • vomiting

Other side effects of azacitidine

Some side effects of azacitidine may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common side effects

For healthcare professionals

Applies to azacitidine: injectable powder for injection, oral tablet, subcutaneous powder for injection.

General adverse events

Most common adverse reactions (greater than 30%) by subcutaneous route are: nausea, anemia, thrombocytopenia, vomiting, pyrexia, leukopenia, diarrhea, injection site erythema, constipation, neutropenia, and ecchymosis. Most common adverse reactions by IV route also included petechiae, rigors, weakness, and hypokalemia.

Most common adverse reactions (greater than 10%) by oral route included nausea, vomiting, diarrhea, fatigue or asthenia, constipation, pneumonia, abdominal pain, arthralgia, decreased appetite, neutropenia, respiratory tract infection, thrombocytopenia, leucopenia, febrile neutropenia, dizziness, back pain and pain in extremity.[Ref]

Hematologic

Other

Local

Dermatologic

Respiratory

Pneumonia include pneumonia, bronchopulmonary aspergillosis, lung infection, Pneumocystis jirovecii pneumonia, atypical pneumonia, pneumonia bacterial, and pneumonia fungal.

Respiratory tract infection include upper respiratory tract infection, respiratory tract infection, and respiratory tract infection viral.[Ref]

Musculoskeletal

Nervous system

Metabolic

Oncologic

Cardiovascular

Ocular

Psychiatric

Renal

Urinary tract infection include urinary tract infection, urinary tract infection bacterial, Escherichia urinary tract infection, and cystitis.[Ref]

Hepatic

Hypersensitivity

Immunologic

Gastrointestinal

Abdominal pain include abdominal pain, abdominal pain upper, abdominal discomfort, and gastrointestinal pain.[Ref]

See also:

References

1. (2004) "Product Information. Vidaza (azacitidine)." Celgene Corporation

2. Cerner Multum, Inc. "UK Summary of Product Characteristics."

3. Cerner Multum, Inc. "Australian Product Information."

Further information

Azacitidine side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.