Idarubicin (Idamycin®)

Author: OncoLink Team
Content Contributor: Allyson Van Horn, MPH
Last Reviewed: April 22, 2026

Pronounce: eye-duh-ROO-bih-sin

Classification: Anthracycline

About Idarubicin (Idamycin®)

For cancer cells to grow, DNA must be copied. Anthracyclines stop the copying of DNA which causes cancer cells to die. This slows or stops a cancerous tumor from growing. 

How to Take Idarubicin

This medication is given through intravenous (IV, into a vein) infusion or injection. It can be given alone or with other drugs. The dosage and schedule is determined by the person's size, type of cancer, and mode of administration.

This medication may cause burning or pain, even when given correctly by trained staff. Sometimes, the medication can leak out of the vein and cause damage to nearby tissue. Let your provider know right away if where your medication is (or was) given becomes red, swollen, or painful. 

Extravasation can be treated differently depending on the medication, so do not put anything on the area unless your provider tells you to.

This medication is red and your urine may appear orange or reddish in color for 1-2 days after the infusion. This is not blood. This is expected as the medication is cleared from your body. If the red urine continues past two days or if you have other urinary symptoms, such as frequency or painful urination, call your healthcare provider.

Possible Side Effects

These are some of the most common or most serious side effects of this medication. Talk with your provider about the side effects you are having and how they can be managed.

Heart Problems

This medication can cause or worsen pre-existing heart problems, like congestive heart failure, restrictive cardiomyopathy, decreased heart function, and heart attack. Symptoms may be:

  • Sudden weight gain.
  • Swelling in your ankles or legs.
  • Chest pain or pressure.
  • Pain in your left arm, back, or jaw.
  • Sweating.
  • Shortness of breath.
  • Clammy skin.
  • Nausea.
  • Dizziness or lightheadedness.

If you have any of these symptoms, call 911.

Secondary Cancers

A secondary cancer happens as a result of cancer treatment for another cancer. This is rare, but you should know your risk. Secondary cancers can be related to chemotherapy and other anti-cancer medications. Often, a secondary cancer is a blood cancer. This can happen years after treatment and is often related to repeated treatments or high doses. Your provider will watch your labs closely. They may suggest you have a blood test called a complete blood count with differential. This is often done each year if you had high risk therapies.

Low White Blood Cell Count (Leukopenia or Neutropenia)

White blood cells (WBC) help your body fight infection. While you are having treatment for cancer, your WBC count can drop, putting you at a higher risk of an infection. Tell your provider right away if you have a fever (temperature greater than 100.4°F or 38°C), sore throat or cold, shortness of breath, cough, burning with urination, or a sore that doesn't heal.

Tips for preventing infection:

  • Hand washing: both yours and your visitors is the best way to prevent the spread of infection.
  • Avoid large crowds and people who are sick (those who have a cold, fever, or cough, or live with someone with these symptoms).
  • When working outside, wear clothes that protect you, like long pants and gloves.
  • Do not handle pet waste.
  • Keep all cuts and scratches clean.
  • Shower or bathe daily. 
  • Brush your teeth at least twice a day.
  • Do not cut cuticles or ingrown nails. You may wear nail polish, but not fake nails.
  • Ask your providers before scheduling dental appointments or procedures.
  • Ask your providers before you or someone you live with has any vaccines

Low Red Blood Cell Count (Anemia)

Anemia is when your red blood cell count is lower than normal. Red blood cells carry oxygen to the tissues in your body. When your red cell count is low, you may feel tired or weak. Tell your providers if you have shortness of breath, trouble breathing, or pain in your chest. If your count gets too low, you may receive a blood transfusion.

Low Platelet Count (Thrombocytopenia)

Platelets are blood cells that help your blood clot. Thrombocytopenia is when your platelet count is lower than normal, and you are at a higher risk of bleeding. Tell your providers if you have any bruising or bleeding, including nose bleeds, bleeding gums, or blood in your urine or stool. If your count gets too low, you may receive platelets from a donor. 

  • Do not use a razor (an electric razor is fine).
  • Do not do activities that can cause injury or bleeding.
  • Talk to your provider before taking any non-steroidal, anti-inflammatory medications (NSAIDs) like Motrin/Advil (ibuprofen), Aleve (naproxen), Celebrex (celecoxib), and others. These can raise the risk of bleeding. 
  • Use a soft-bristle toothbrush to brush your teeth. Ask your provider about flossing or using toothpicks. 

Liver Toxicity

This medication can cause liver toxicity, or liver problems, which your provider may monitor for with blood tests called liver function tests. Symptoms may be:

  • Yellowing of your skin or eyes.
  • Dark or brown urine.
  • Pain in your abdomen (belly).

Tell your provider if you have any of these symptoms.

Nausea and/or Vomiting

Talk to your providers if you have nausea and/or vomiting. They can prescribe medications to help you. Making changes to your diet can also help. Avoid things that make your symptoms worse, like heavy or greasy/fatty foods and spicy or acidic foods, like tomatoes, lemons, and oranges. Try saltines or ginger ale to help your symptoms.  

Call your providers if you cannot keep fluids down for more than 12 hours or if you feel lightheaded or dizzy.

Loss or Thinning of Scalp and Body Hair (Alopecia)

Alopecia is when your hair gets thin, brittle (breaks easily), or falls out. This may happen during the few weeks after treatment starts. Hair loss can be all of your body hair, including pubic, underarm, legs/arms, eyelashes, and nose hairs. You may want to use scarves, wigs, hats, and hairpieces. Your hair helps keep you warm in cold weather, and it can protect you from the sun, so it is important to wear a hat if you are in cold weather or in the sun. If you are going to be out in the sun, protect your scalp by using a sunscreen with SPF 30 or higher. Wash your scalp with a mild or baby shampoo. After you are done with treatment, hair often starts to grow back.

Diarrhea

Diarrhea is when you pass three or more stools in a day. Your providers can suggest medications to relieve diarrhea. Do not take any medications to manage your diarrhea without talking to your provider first, as your stool may need to be tested. To manage it, try eating foods that are low in fiber and bland, like white rice and boiled or baked chicken. Try not to eat raw fruits, vegetables, whole grain breads, cereals, and seeds. Soluble fiber is a type of fiber found in some foods that helps absorb (soak up) fluid. Foods high in soluble fiber are applesauce, bananas (ripe), canned fruit, oranges, boiled potatoes, white rice, foods made with white flour, oatmeal, cream of rice, cream of wheat, and farina. Stay hydrated by drinking 8 to 10 glasses of non-alcoholic, non-caffeinated fluid each day.

Mouth Ulcers (Mucositis)

This medication can cause sores or soreness in your mouth and/or throat, called mucositis. Tell your providers if your mouth, tongue, inside of your cheek, or throat becomes white, has ulcers, or is painful. Medications can be used to manage pain. Regular mouth care can help prevent or manage mouth sores. Some things you can do are:

  • Brush with a soft-bristle toothbrush or cotton swab twice a day.
  • Avoid mouthwashes that contain alcohol. A baking soda and/or salt with warm water mouth rinse (2 level teaspoons of baking soda or 1 level teaspoon of salt in an eight-ounce glass of warm water) can be used a few times each day.
  • If your mouth gets dry, eat moist foods, drink plenty of fluids (6 to 8 glasses), and suck on sugarless hard candy.
  • Avoid smoking and chewing tobacco, and drinking alcoholic beverages and citrus juices.

Nail and Skin Changes

It is important to keep your fingernails and toenails clean and dry. Your fingernails/toenails may become dark, brittle, or fall off. If any nails fall off, clean the nail bed well with soap and water and cover it with a band-aid. Nail polish is safe to use, but do not wear fake nails (gels, acrylics, overlay).

You may notice dry skin or changes in the color or tone of your skin. This medication can make your skin more sensitive to the sun, which can result in a severe sunburn or rash. Sun sensitivity can last even after you are done with chemotherapy. Avoid the sun between 10 am and 4 pm, when it is strongest. Wear sunscreen every day and reapply when you are in the sun. The best sunscreen is SPF 30 or higher and protects against both types of sunlight, UVA and UVB. Wear sunglasses, a hat, and long sleeves/pants to protect your skin, a lip balm with SPF of at least 30, and stay in the shade whenever possible.

Tell your providers if you develop red, painful, or itchy skin, sunburn, skin irritation, bumps, or thick, dry skin.

Fatigue

Fatigue can cause exhaustion, feeling worn out and that your body is "heavy" and hard to move, or being unable to focus. It is common when you have cancer, and it is not the same as feeling tired. You may need to adjust your schedule to manage fatigue. Plan times to rest during the day and save your energy for more important activities. Exercise can help lessen fatigue. Talk to your providers about ways to deal with this side effect.

Fertility

This medication may affect your fertility. It can cause changes to your menstrual cycle or sperm. You may want to consider sperm banking or egg harvesting if you might wish to have a child in the future. Talk about your options with your provider before treatment.

Reproductive Concerns

There is a higher risk of health problems for your baby if you are pregnant, become pregnant, or get someone pregnant while on this medication. To lower the risk of birth defects, you should use birth control (contraception) to avoid pregnancy. Talk with your provider about what kind of birth control is safest for you and your partner.

If you can become pregnant, you will need to use effective birth control during treatment and for 6.5 months after the last dose of this medication, even if your menstrual cycle has stopped or changed. If you can get someone pregnant, you will need to use effective birth control during treatment and for 3.5 months after the last dose of this medication, even if you believe you are not producing sperm. You should not breastfeed during treatment and for 14 days after the last dose of this medication.

Important but Less Common Side Effects

Radiation Recall

Radiation recall is when a medication causes a rash that looks like sunburn in an area where you had radiation treatment.

  • Redness.
  • Swelling.
  • Soreness.
  • Peeling skin.

You may be told to put a topical steroid cream on your skin, or you may need to wait to have your next scheduled dose of chemotherapy. Tell your provider if you notice any of these symptoms.

Tumor Lysis Syndrome

Tumor Lysis Syndrome (TLS) is a side effect that happens when tumor cells die too quickly, and their waste overwhelms the body. You may be given a medication (allopurinol) and IV fluids to help prevent this. TLS can affect your kidney function. Your provider will monitor your kidney function with blood work. Symptoms may be:

  • Nausea.
  • Vomiting.
  • Diarrhea.
  • Lethargy (feeling tired, drowsy, sluggish).
  • Little or no urine output.

Tell your provider right away if you have any of these symptoms.