Brand Names:
Fosamax
What is it?
Alendronate sodium is normally used to treat or prevent osteoporosis (thinning of the bone). The drug binds to the bones in the body and prevents them from breaking down
What’s In It For Me?
Thin bones can easily break or fracture. Alendronate sodium prevents bones from
thinning and strengthens bones that are already weak. This medication is usually
taken only once a week and can reduce your chances of having a bone break or
fracture by about a third. See our Osteoporosis page for more information.
The Good
This medication is usually taken only once per week. It has been proven to decrease the risk of fractures in women who are at high risk.
The Bad
You must be able to stand or sit upright for 30 minutes after taking alendronate sodium. The tablet needs to be taken with a full glass of water at least a half hour (preferably 2 hours) before the first food of the day. The most common side effects are upset stomach, constipation or diarrhea. Approximately 3% of people taking alendronate sodium experience muscle or bone pain.
The Controversial
Bone strength is often estimated by measuring a person’s bone mineral density (BMD). This
will determine if you have osteoporosis or not. We believe that alendronate sodium should only be prescribed after a person is diagnosed with osteoporosis and should not be used for prevention of osteoporosis.
In fact, we only recommend alendronate for patients who have a high of a fracture in the next 10 years. You can calculate your risk by using this FRAX calculator provided by the World Health Organization. Select your country and ethnicity first under calculation tools and then fill out the form. See our Osteoporosis Page for specific tratment recommendations for you.
Fact Boxes
| Type of Fracture | Typical 10 year risk w/o medication | 10 year risk w/ medication * |
|---|---|---|
| People who have NOT had a fracture | ||
| Hip | 2% | no difference |
| Vertebral | 12% | 14% |
| People who HAVE had a fracture | ||
| Hip | 4% | 2% |
| Vertebral | 20% | 14% |
For The Cynic
If you do not have osteoporosis, do not bother with taking alendronate. This medication reduces the risk of clinical fractures in women with osteoporosis but not in women with higher bone mineral density (BMD). Alendronate can decrease the risk of a major fracture by up to 6% in a patient with osteoporosis who have had a fracture. This means that if your risk of having a fracture is 20%, alendronate may decrease your risk to 14%. In other words, with alendronate your chances of NOT having a fracture would increase from 80% to 86%.
The Cost
Alendronate sodium is $9 for a month supply (4 tablets) or $24 for a 3 month supply (12 tablets) at the pharmacies that have a $4 price list. Fosamax Plus D is not available as a generic and costs about $100 for a one month supply (4 tablets). We recommend taking over the counter vitamin D supplements with generic alendronate sodium.

Alendronate is effective in reducing fractures, but should only be used by those at high risk.






