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the Message Continues ... 11/102




Newsletter for February 2010


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What is osteoporosis?

Osteoporosis (say: ost-tee-oh-pore-oh-siss) occurs when the inside of the bones become porous from a loss of calcium (see the picture below). This is called losing bone mass. Over time, this weakens the bones and makes them more likely to break.

Once total bone mass has peaked ó around age 35 ó all adults start to lose it. However, women are more likely to develop osteoporosis than men. This is due to several factors. Women have less bone mass than men, tend to live longer and take in less calcium. In women, the rate of bone loss speeds up after menopause, when estrogen levels fall. Since the ovaries make estrogen, faster bone loss may also occur if both ovaries are removed by surgery.

If men live long enough, they are also at risk of getting osteoporosis later in life.

What are the signs of osteoporosis?

You may not know you have osteoporosis until you have serious signs. Signs include frequent broken bones or fractures, low back pain or a hunched back. You may also get shorter over time because osteoporosis can cause your vertebrae (the bones in your spine) to collapse. These problems tend to occur after a lot of bone calcium has already been lost.

What are the risk factors for osteoporosis?

The following things put you at increased risk for osteoporosis. The more of these that apply to you, the higher your risk is. Talk to your family doctor about your risk factors.
  • Early menopause (before age 45)
  • Family history of osteoporosis
  • Surgery to remove ovaries before menopause
  • Fair skin (caucasian or Asian race)
  • Not getting enough calcium
  • Sedentary lifestyle (not getting enough exercise)
  • Smoking or tobacco use
  • Alcohol abuse
  • Eating disorders such as anorexia nervosa
  • Thin body and small bone frame
  • Fair skin (caucasian or Asian race)
  • Hyperthyroidism, either from an overactive thyroid or from taking too much medicine to treat hypothyroidism.
  • Long-term use of corticosteroids, which are medicines prescribed to treat inflammation, pain and chronic conditions such as asthma and rheumatoid arthritis.

How is osteoporosis diagnosed?

If you doctor suspects osteoporosis, he or she may suggest you have a bone scan. A common test that measure bone density is called a dual energy X-ray absorptiometry (DEXA). This test measures the density of the bones in your hips, spine and wrist, which are all places likely to be affected by osteoporosis.

Your doctor may also order an ultrasound or a computerized tomography (CT) scan to help check the density of your bones.

What is ibandronate sodium?

Ibandronate sodium (brand name: Boniva) is a new drug that is taken once a month. It is not a hormone, but it slows bone loss and increases bone density. Some of the possible side effects include upset stomach, heartburn, nausea and diarrhea.

How is osteoporosis treated?

Treatment for osteoporosis starts with changes to your diet. You want to take in more calcium. Your doctor will suggest ways to get more calcium through food, drink and possibly a calcium supplement. He or she may also suggest you take a vitamin D supplement, which helps your body process calcium.

Your doctor will also suggest that you increase your physical activity, especially weight-bearing exercise. This helps increase bone density. Examples of weight-bearing exercise include walking, jogging and climbing steps.

There are medicines available to treat osteoporosis. They include the following:

Biophosphonates. These medcines help redece the risk of breaks and fractures, as well as increase bone density in the hips and spine. They can be taken in orally (in pill form) of intravenously (with an injection). Side effects include nausea, abdominal pain and irritation of the esophagus (the tube that connects the mouth to the stomach). People who cannot take biophosphonates include people who have kidney disease, low levels of calcium in their blood and women who are pregnant or nursing.

Calcitron. This is a hormone that helps slow the breakdown of bone. It is available as injection or nasal spray. Side effects include irritation of the lining of the nose and headache (with use of the nasal spray) and diarrhea, abdominal pain, nausea and vomiting (with use of the injection).

Raloxifene. This medicine is used to prevent and treat osteoporosis in women by increasing bone density. It is not a hormone, but it mimics some of the effects of estrogen. Side effects may include hot flashes and a risk of blood clots.

Teriparatide. This medicine is a synthetic form of parathyroid hormone and helps new bone to grow. It comes in an injectable form, and is injected once a day in the thigh or abdomen. It can be used in both women and men for the treatment of osteoporosis. Common side effects may include nausea, abdominal pain, headache, muscle weakness, fatigue and loss of appetite.

Alendronate and Risedronate. These medicines are used to help prevent and treat osteoporosis. These drugs help reduce the risk of fractures by decreasing the rate of bone loss. They are taken orally in pill form. Their most common side effect is an upset stomach.

Ibandronate. This medicine helps to slow bone loss and increases bone density. It is available both as a pill or as an injection. If you take the pill, you have 2 options: a daily pill or a monthly pill (the pill you take each month has a greater dose of ibandronate than the pill you take daily). If you take the injection, your doctor or nurse will give you a shot every 3 months. Some of the possible side effects include lower back or side pain, shortness of breath, tightness in the chest, and bloody or cloudy urine.

How much calcium do I need?

Before menopause, you need about 1,000 mg of calcium per day. After menopause, you need 1,000 mg of calcium per day if you're taking estrogen and 1,500 mg of calcium per day if you're not taking estrogen. You should also aim for 800 international units (IU) of vitamin D each day to help your body absorb the calcium.

Itís usually best to try to get calcium from food. Nonfat and low-fat dairy products are good sources of calcium. Other sources of calcium include dried beans, pink salmon, spinach and broccoli.

About 300 mg of calcium are in each of the following: 1 cup of nonfat or low-fat yogurt, 1 1/2 cups of white beans, 5 ounces of salmon, 1/2 cup of spinach or 2 cups of broccoli.

If you donít get enough calcium from the food you eat, your doctor may suggest taking a calcium supplement. Take it at meal time or with a sip of milk.

Tips to keep bones strong

  • Exercise.
  • Eat a well-balanced diet with at least 1,000 mg of calcium a day.
  • Quit smoking. Smoking makes osteoporosis worse.
  • Talk to your doctor about hormone therapy (HT) or other medicines to prevent or treat osteoporosis.


Written by editorial staff.

American Academy of Family Physicians









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