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Ankylosing Spondylitis

Understanding Ankylosing Spondylitis

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What is AS?

Ankylosing spondylitis (AS) is a chronic and often progressive condition that primarily involves pain and inflammation of the joints of the spine. AS affects the joints between the vertebrae and the sacroiliac joints (the area where your spine meets your pelvis).

AS affected joints

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What are the symptoms of AS?

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AS has a wide range of symptoms that may include:

  • Lower back pain and stiffness that is worse in the morning when you get up, and improves after movement, exercise, or a hot shower

  • Pain and stiffness in your hips, causing limited range of motion

  • Pain and stiffness in your shoulders, causing limited range of motion

  • Restricted expansion of your chest

  • Stiffness in your neck

  • Tiredness

  • Inflammation of your eyes

  • Inflammation of other parts of your body

AS gets worse over time

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With AS, the ability to function gets progressively limited over time. Even when a patient's x-rays are normal, there can be a major reduction in spinal mobility. The first 10 years may be key. Most of the loss of function occurs during this time.

Who has AS?

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The prevalence of AS varies from one ethnic or racial population to another. For the Caucasian population in the United States and United Kingdom, prevalence ranges from 0.5% to 1%, and in some other populations the rate may be more than double. AS affects 5 times more men than women. Typically, it starts between the ages of 16 and 40.

What causes AS?

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The cause of AS is unknown, but scientists believe that environmental, bacterial, genetic, and immune-related factors may be involved.

How do I know if I have AS?

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Only a qualified physician can determine whether or not you have AS. Although your general practitioner may be able to diagnose your symptoms, it's a good idea to see a rheumatologist if you suspect you have AS or any other type of arthritis.

To find a rheumatologist who has experience with ENBREL, a treatment for AS, and other forms of AS treatment, visit the Rheumatologist Directory Service.

Find a rheumatologist now Find >

You may also want to use the AS Symptoms Checklist to create your own symptom profile. You can print and share your profile with your rheumatologist or other health care professional to help start the discussion about your symptoms.

Symptoms Checklist Start >

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IMPORTANT SAFETY INFORMATION

What is the most important information I should know about ENBREL?

ENBREL is a medicine that affects your immune system. ENBREL can lower the ability of your immune system to fight infections. Serious infections have happened in patients taking ENBREL. These infections include tuberculosis (TB) and infections caused by viruses, fungi, or bacteria that have spread throughout the body. Some patients have died from these infections. Your doctor should test you for TB before you take ENBREL and monitor you closely for TB while on ENBREL.

Before starting ENBREL, tell your doctor if you:
  • Think you have, are being treated for, have signs of, or are prone to infection. You should not start taking ENBREL if you have any kind of infection.
  • Have any open cuts or sores
  • Have diabetes or an immune system problem
  • Have TB or have been in close contact with someone who has had TB
  • Were born in, lived in, or traveled to countries where there is more risk for getting TB. Ask your doctor if you are not sure.
  • Live or have lived in certain parts of the country (such as, the Ohio and Mississippi River valleys, or the Southwest) where there is a greater risk for certain kinds of fungal infections, such as histoplasmosis. These infections may develop or become more severe if you take ENBREL. If you don't know if histoplasmosis or other fungal infections are common in the areas where you live or have lived, ask your doctor.
  • Have or have had hepatitis B
  • Have heart failure
  • Develop symptoms such as persistent fever, bruising, bleeding, or paleness while taking ENBREL
  • Use the medicine Kineret® (anakinra)
  • Have or develop a serious nervous disorder, seizures, any numbness or tingling, or a disease that affects your nervous system such as multiple sclerosis
  • Are scheduled to have surgery
  • Are scheduled for any vaccines. All vaccines should be brought up-to-date before starting ENBREL. Patients taking ENBREL should not receive live vaccines.
  • Are allergic to rubber or latex
  • Are pregnant, planning to become pregnant, or breastfeeding

After starting ENBREL, call your doctor right away if you have any sign of infection, including a fever, cough, flu-like symptoms, or have any open sores on your body. ENBREL can make you more likely to get infections or make any infection you have worse.

Possible side effects of ENBREL

Serious side effects include: serious infections including TB; nervous system problems, such as multiple sclerosis, seizures, or inflammation of the nerves of the eyes; rare reports of serious blood problems (some fatal); heart failure, including new heart failure or worsening of heart failure you already have; allergic reactions; immune reactions, including a lupus-like syndrome and lymphoma (a type of cancer). People with rheumatoid arthritis and psoriasis may have a higher chance for getting lymphoma.

Common side effects include: Injection site reaction, upper respiratory infections (including sinus infection), and headaches.

In a medical study of patients with JIA, infection, headache, abdominal pain, vomiting, and nausea occurred more frequently than in adults. The kinds of infections reported were generally mild and similar to those usually seen in children. Other serious adverse reactions were reported, including serious infection and depression/personality disorder.

If you have any questions about this information, be sure to discuss them with your doctor. You are encouraged to report negative side effects of prescription drugs to the FDA. Visit www.fda.gov/medwatch, or call 1-800-FDA-1088.

Please see Prescribing Information and Medication Guide.

INDICATIONS
Moderate to Severe Rheumatoid Arthritis (RA)
ENBREL is indicated for reducing signs and symptoms, keeping joint damage from getting worse, and improving physical function in patients with moderate to severe rheumatoid arthritis. ENBREL can be taken with methotrexate or used alone.

  • In medical studies, ENBREL was shown to be effective in about 2 out of 3 adults with RA who used it, and has been shown to begin working in as few as 2 weeks, with most patients receiving benefit within 3 months. In an RA medical study, 55% of patients had no progression of joint damage.

Moderate to Severe Polyarticular Juvenile Idiopathic Arthritis (JIA)
ENBREL is indicated for reducing signs and symptoms of moderately to severely active polyarticular juvenile idiopathic arthritis (JIA) in children ages 2 years and older.

  • In a medical study, ENBREL was shown to be effective in about 3 out of 4 children with JIA who used it. For these JIA patients, ENBREL has been shown to begin working in approximately 2 to 4 weeks.

Psoriatic Arthritis
ENBREL is indicated for reducing signs and symptoms, keeping joint damage from getting worse, and improving physical function in patients with psoriatic arthritis. ENBREL can be used in combination with methotrexate in patients who do not respond adequately to methotrexate alone.

  • In a medical study, ENBREL was shown to be effective in about 50% of psoriatic arthritis patients who used it. Clinical responses were apparent at the time of the first visit (4 weeks) and were maintained through 6 months of therapy.

Ankylosing Spondylitis (AS)
ENBREL is indicated for reducing signs and symptoms in patients with active ankylosing spondylitis.

  • In a medical study, ENBREL was shown to be effective in about 3 out of 5 adults with AS who used it. Clinical responses were seen at 2 weeks in 46% of patients, with 59% of patients receiving benefit within 8 weeks.

Moderate to Severe Plaque Psoriasis
ENBREL is indicated for the treatment of adult patients (18 years or older) with chronic moderate to severe plaque psoriasis who are candidates for systemic therapy or phototherapy.

  • In medical studies, nearly half of patients saw a significant improvement in their plaque psoriasis within 3 months of using ENBREL. Overall, 3 out of 4 patients saw improvement. ENBREL can work fast; many patients saw improvement within 2 months. ENBREL has been shown to be effective through 12 months of therapy.
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