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The Basics of Osteoarthritis
Arthritis is a general term that means inflammation in joints. Osteoarthritis, also called degenerative joint disease, is the most common type of arthritis. It is associated with a breakdown of cartilage in joints and can occur in almost any joint in the body. It most commonly occurs in the weight bearing joints of the hips, knees, and spine. It can also affect the fingers, thumb, neck, and large toe. It usually does not affect other joints unless previous injury or excessive stress is involved.
Cartilage is a firm, rubbery material that covers the ends of bones in normal joints. Its main function is to reduce friction in the joints and serve as a "shock absorber." The shock-absorbing quality of normal cartilage comes from its ability to change shape when compressed (flattened or pressed together).
Osteoarthritis causes the cartilage in a joint to become stiff and lose its elasticity, making it more susceptible to damage. Over time, the cartilage may wear away in some areas, greatly decreasing its ability to act as a shock absorber. As the cartilage deteriorates, tendons and ligaments stretch, causing pain. If the condition worsens, the bones could rub against each other.
Who Gets Osteoarthritis?
Osteoarthritis affects nearly 21 million Americans. The chance of developing the disease increases with age. Most people over age 60 have osteoarthritis to some degree, but its severity varies. Even people in their 20s and 30s can get osteoarthritis. In people over 50, more women than men get osteoarthritis.
What Are the Symptoms of Osteoarthritis?
Symptoms of osteoarthritis most often develop gradually and include:
- Joint aching and soreness, especially with movement.
- Pain after overuse or after long periods of inactivity.
- Bony enlargements in the middle and end joints of the fingers (which may or may not be painful).
- Joint swelling and joint fluid accumulation.
What Causes Osteoarthritis?
There are several factors that increase a person's chances of developing osteoarthritis. These include:
-
Heredity. Some people have an inherited defect in one of the genes
responsible for making cartilage. This causes defective cartilage, which leads
to more rapid deterioration of joints. People born with joint abnormalities are
more likely to develop osteoarthritis, and those born with an abnormality of
the spine (such as scoliosis or curvature of the spine) are more likely to
develop osteoarthritis of the spine.
-
Obesity. Obesity increases the risk for osteoarthritis of the knee
and hip. Maintaining ideal weight or losing excess weight may help prevent
osteoarthritis of the knee and hip or decrease the rate of progression once
osteoarthritis is established.
-
Injury. Injuries contribute to the development of osteoarthritis.
For example, athletes who have knee-related injuries may be at higher risk of
developing osteoarthritis of the knee. In addition, people who have had a
severe back injury may be predisposed to develop osteoarthritis of the spine.
People who have had a broken bone near a joint are prone to develop
osteoarthritis in that joint.
- Joint Overuse. Overuse of certain joints increases the risk of developing osteoarthritis. For example, people in jobs requiring repeated bending of the knee are at increased risk for developing osteoarthritis of the knee.
WebMD Medical Reference provided in collaboration with the Cleveland Clinic
ORENCIA® (abatacept) Important Safety Information
Indication and Usage
ORENCIA® (abatacept) is a prescription medicine that reduces signs and symptoms in adults with moderate to severe rheumatoid arthritis (RA), including those who have not been helped enough by other medicines for RA. ORENCIA may prevent further damage to your bones and joints and may help your ability to perform daily activities.
Important Safety Information About ORENCIA® (abatacept)
Before you receive treatment with ORENCIA, a lyophilized powder for intravenous infusion, you should tell your doctor about all your medical conditions, including if you:
- have any kind of infection even if it is small (such as an open cut or sore) or an infection that is in your whole body (such as the flu).
- have an infection that will not go away or a history of infections that keep coming back.
- have had tuberculosis (TB), a positive skin test for TB, or if you recently have been in close contact with someone who has had TB. If you get any of the symptoms of TB (a dry cough that doesn’t go away, weight loss, fever, night sweats), call your doctor right away. Before you start ORENCIA, your doctor may examine you for TB or perform a skin test.
- have or have had viral hepatitis. Before you use ORENCIA, your doctor may examine you for hepatitis.
- have a history of chronic obstructive pulmonary (lung) disease (COPD).
- are scheduled to have surgery.
- are allergic to any of the following ingredients in ORENCIA: abatacept, maltose, monobasic sodium phosphate, or sodium chloride for administration.
- recently received a vaccination or are scheduled for any vaccination.
- have diabetes and use a blood glucose monitor to check your sugar levels. The infusion of ORENCIA contains maltose, a sugar that can give falsely high blood glucose readings with some monitors on the day you receive your infusion. Your doctor may tell you to use a different way to monitor your blood sugar levels.
- are pregnant, planning to become pregnant, or are thinking about becoming pregnant. It is not known if ORENCIA can harm your unborn baby.
- are breast-feeding. You will need to decide to either breast-feed or receive treatment with ORENCIA, but not both.
- take any other kinds of medicine, including prescription and nonprescription medicines, vitamins, and herbal supplements.
- are taking other biologic medicines to treat RA such as: Enbrel® (etanercept), Humira® (adalimumab), Remicade® (infliximab), Kineret® (anakinra) or Rituxan® (rituximab). You may have a higher chance of getting a serious infection if you take ORENCIA with other biologic medicines.
Possible Side Effects of ORENCIA® (abatacept)
ORENCIA can cause serious side effects including:
- Serious infections. Patients receiving ORENCIA have a higher chance of getting infections including pneumonia, and other infections caused by viruses, bacteria, or fungi. Call your doctor immediately if you feel sick or get any of the following signs of infection: fever, feel very tired, cough, feel flu-like, or warm, red or painful skin.
- Allergic reactions. Allergic reactions can happen on the day of treatment or the day after receiving ORENCIA. Tell your doctor or get emergency medical help right away if you have hives, swollen face, eyelids, lips, tongue, throat, or trouble breathing.
- Cancer (malignancies). Certain kinds of cancer have been reported in patients receiving ORENCIA. It is not known if ORENCIA increases your chance of getting certain kinds of cancer.
- Vaccinations. You should not receive ORENCIA with certain types of vaccines. ORENCIA may cause some vaccinations to be less effective.
- Respiratory problems in patients with COPD. You may get certain respiratory problems more often if you receive ORENCIA and have COPD, including: worsened COPD, pneumonia, cough, or trouble breathing.
The more common side effects with ORENCIA are headache, upper respiratory tract infection, sore throat, and nausea.
Please read the Patient Information in the Full Prescribing Information below.
ORENCIA is a registered trademark of Bristol-Myers Squibb Company.
All other trademarks are property of their respective companies.
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