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Medications > Etanercept | Brenzys > Etanercept (Brenzys) – Detailed Information


What is Brenzys?

Brenzys is a biologic agent specifically engineered to treat inflammation. It is used for the treatment of Rheumatoid arthritis, Psoriatic arthritis, Ankylosing spondylitis, Juvenile inflammatory arthritis, and other types of arthritis.

How does Brenzys work?

In some people with arthritis, a protein called Tumour Necrosis Factor (TNF) is present in the blood and joints in excessive amounts where it increases inflammation (pain & swelling). Brenzys is another type of protein called a TNF blocker which blocks the action of TNF. By blocking TNF, Brenzys works by suppressing the body’s immune system. Although this suppression can make it slightly harder for you to fight off infections, it also helps to stabilize an overactive immune system.

Why am I taking Brenzys?

Your doctor has prescribed this medicine to help with the following:

  • Reduce the pain and swelling (inflammation) in your joints.
  • Improve your day to day function.
  • Prevent any long-term damage from the joint inflammation.

What is the usual dose of Brenzys?

  • Brenzys is taken by injection under the skin ONCE TO TWICE PER WEEK.
  • The standard dose of each injection is 25-50 mg.

How often do I take Brenzys?

Brenzys is taken ONCE TO TWICE A WEEK.

Who should NOT take Brenzys?

  • Patients who have had a previous serious allergic reaction to Brenzys.
  • Women who are pregnant, planning on becoming pregnant in the near future, or currently breast feeding.
  • Possibly patients who have cancer or have had a past history of certain cancers.
  • Patients who have severe or uncontrolled congestive heart failure.
  • Patients who have multiple sclerosis.
  • Patients with active infections (such as tuberculosis).

When will I start to feel the effects of Brenzys?

Brenzys will take about 2 weeks before you start to feel the effects. It may take 4 to 12 weeks before you feel the maximum effect.

What should I AVOID while taking Brenzys?

You should discuss all vaccinations with your doctor as some vaccines are not advisable while you are taking Brenzys.

If you are scheduled for surgery, please tell your doctor.

When should I NOT TAKE my Brenzys?

You should contact your doctor before missing a dose of Brenzys. However, in the following situations, it would be advisable to stop the Brenzys:

  • If you have a fever.
  • If you have or think you have an infection.
  • If you think you are pregnant.

Which Medications are safe to take with Brenzys?

Your rheumatologist may decide to add other medications to treat your arthritis. Most medications may be taken safely with Brenzys. For example, some of the other medications which may be safely added to Brenzys include: Acetaminophen (Tylenol), Prednisone, and Other DMARDs (i.e. Methotrexate)

What are the side-effects of Brenzys?

MORE COMMON side-effects include:

  • Mild skin reaction at the injection site (itchiness, redness, and mild swelling).
  • Headaches
  • Upper respiratory tract infections (such as sinusitis).

RARE side-effects include:

  • Blood Counts – Brenzys can cause a drop in the numbers of white blood cells (which are needed to fight infection) or red blood cells (which carry oxygen). This is very rare and it is unusual for this to be a serious problem.
  • Infection – There have been serious infections associated with the use of Brenzys. Any infections or fevers should be taken very seriously and reviewed by your doctor.
  • Nervous System – There have been rare reports of some patients developing disorders that affect the nervous system (multiple sclerosis, seizures, or inflammation of the nerves of the eye) while taking Brenzys. Fortunately, these reports are exceedingly rare.
  • Heart – Inform your doctor if you have congestive heart failure as Brenzys may make it worse.
  • Malignancy – When used for long periods of time, Brenzys may be associated with a small increased risk of lymphoma.

How can I help to minimize the side-effects of Brenzys?

Take your Brenzys as prescribed by your doctor.

Do I need to have regular blood tests while taking Brenzys?

Blood tests are not routinely required while you are taking Brenzys. However, your doctor will likely order periodic blood tests to check your blood counts and follow the activity of your arthritis.

How do I stop the Brenzys?

You do not need to wean yourself off the Brenzys. It can simply be stopped. However, your arthritis will likely “flare” after you stop the medicine.

What should I do if I miss a dose of Brenzys?

If you forget to take your Brenzys contact your doctor to find out when to take your next dose.

Is Brenzys safe in pregnancy?

Brenzys is a new medication and it is unknown if it is safe to use in pregnancy. Therefore, you should AVOID PREGNANCY while on Brenzys.

  • All women of child bearing potential taking Brenzys must use reliable contraception.
  • If you become pregnant while taking Brenzys NOTIFY YOUR DOCTOR IMMEDIATELY.
  • You should not breast feed while taking Brenzys.