Darzalex treats a form of blood cancer (multiple myeloma) in patients who have received at least three prior treatments. It is the first monoclonal antibody approved for treating multiple myeloma.

Darzalex Overview

Reviewed: November 16, 2015

Darzalex treats multiple myeloma in patients who have received at least three prior treatments or have not responded to two specific types of treatments. 

It belongs to a group of drugs called monoclonal antibodies. These work by helping certain cells in the immune system attack cancer cells.

This medication is available as an injection to be infused by a healthcare professional.

Common side effects of Darzalex include infusion-related reactions and fatigue.

Patient Ratings for

How was your experience with ?

First, a little about yourself

Tell us about yourself in a few words?

What tips would you provide a friend before taking ?

What are you taking for?

Choose one
  • Other

How long have you been taking it?

Choose one
  • Less than a week
  • A couple weeks
  • A month or so
  • A few months
  • A year or so
  • Two years or more

How well did work for you?

Did you experience many side effects while taking this drug?

How likely would you be to recommend to a friend?

Darzalex Cautionary Labels


Uses of Darzalex

Darzalex treats multiple myeloma (a form of blood cancer that occurs in a type of white blood cells) in patients who:

  • have received at least three prior treatments to treat multiple myeloma, including a proteasome inhibitor and an immunomodulatory agent OR
  • did not respond to a proteasome inhibitor and an immunomodulatory agent

It is not known if Darzalex is safe and effective in children.

This medication may be prescribed for other uses. Ask your doctor or pharmacist for more information.


Darzalex Drug Class

Darzalex is part of the drug class:

Side Effects of Darzalex

Serious side effects have been reported with Darzalex. See the “Darzalex Precautions” section.

Common side effects of Darzalex include the following:

  • infusion-related reactions
  • fatigue
  • nausea
  • back pain
  • fever
  • cough
  • cols-like symptoms such as respiratory infection
  • low blood counts (low white blood cells, low red blood cells (anemia) and/or low levels of blood platelets 

This is not a complete list of Darzalex side effects. Ask your doctor or pharmacist for more information.

Tell your doctor if you have any side effect that bothers you or that does not go away.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

Darzalex Interactions

No drug interactions studies have been performed by the manufacturer. However, you should tell your doctor about all the medicines you take including prescription and non-prescription medicines, vitamins, and herbal supplements. Not all drug interactions are known or reported and new drug interactions are continually being reported.

Darzalex Precautions

Serious side effects have been reported with Darzalex including the following:

  • Infusion reactions. Infusion reactions can occur with this medication. Your doctor may give you certain medications before and after the infusion to help prevent developing a reaction. Tell your doctor or get medical help right away if you get any of these symptoms during or after an infusion this medication:

    • rash or hives (red itchy welts)
    • itching
    • swelling of your lips, tongue, throat or face
    • sudden cough
    • shortness of breath, difficulty breathing, or wheezing
    • nausea or vomiting
    • dizziness or feel faint
    • headache
    • runny or stuffy nose
  • Changes in blood tests. Darzalex can change the results of certain blood tests that determine your blood type. Darzalex can affect these results for up to 6 months after you finish taking it. Your doctor will perform blood tests to determine your blood type before starting you on treatment with Darzalex. Tell all of your healthcare providers that you are taking Darvalex prior to receiving any blood transfusions.

Do not take Darzalex if you are allergic to Darzalex or any of its ingredients.


Darzalex Food Interactions

Medications can interact with certain foods. In some cases, this may be harmful and your doctor may advise you to avoid certain foods. In the case of Darzalex, there are no specific foods that you must exclude from your diet when receiving this medication.

Inform MD

Before taking Darzalex, tell your doctor about all of your medical conditions. Especially tell your doctor if you:

  • currently have or have previously had any problems with your breathing
  • have had shingles (herpes zoster)
  • are pregnant or plan to become pregnant
  • are breastfeeding or plan to breastfeed

Tell your doctor about all the medicines you take including prescription and non-prescription medicines, vitamins, and herbal supplements.

Darzalex and Pregnancy

Tell your doctor if you are pregnant or plan to become pregnant.

There have been no studies in humans or animals with Darzalex and therefore it is not known how this medication can affect unborn babies. However, monoclonal antibodies such as Darzalex cross the placenta and may cause harm to an unborn baby. Females who are able to become pregnant should use an effective method of birth control during treatment with Darzalex and for at least 3 months after you finish taking Darzalex. Talk to your healthcare provider about which birth control methods are right for you.

Darzalex and Lactation

Tell your doctor if you are breastfeeding or plan to breastfeed.

It is not known if Darzalex crosses into human milk. Because many medications can cross into human milk and because of the possibility for serious adverse reactions in nursing infants with use of this medication, a choice should be made whether to stop nursing or stop the use of this medication. Your doctor and you will decide if the benefits outweigh the risk of using Darzalex.


Darzalex Usage

Use Darzalex exactly as prescribed.

Darzalex comes in an injectable form to be infused directly into a vein (IV) by a healthcare professional in a medical setting. It is usually given once a week for the first 8 weeks, then once every 2 weeks for 16 weeks, then once every 4 weeks after that. Your healthcare provider will determine how many treatments you need to receive.

The infusion should be completed within 15 hours. Your doctor will give you other medicines before you receive Darzalex and for the first and second day after you receive Darzalex to help lower your risk of having a reaction to the infusion. If you experience a reaction, your doctor may slow down the infusion or stop Darzalex completely.

If you miss an appointment to receive a dose of Darzalex, call your doctor as soon as possible to reschedule. 

Darzalex Dosage

The dose of Darzalex you receive will be based on your weight. The recommended dose of Darzalex is 16 mg per kg of body weight, given weekly for 8 weeks, then every 2 weeks for 16 weeks, then every 4 weeks after that. 

Darzalex Overdose

If Darzalex is administered by a healthcare provider in a medical setting, it is unlikely that an overdose will occur. However, if overdose is suspected, seek emergency medical attention.

Other Requirements

Make sure to keep all your appointments with your healthcare providers and laboratory.