However, further research in older children and adults is needed.
About 89% of the cases were seen in adults over age 50.
The number increased to one in 11 adults, or 9 percent, for people 35 to 54 years old.
This drug should not be used in adults 65 years or older.
This risk may be greater in children and young adults.
It is more common in adults, with the average age being 40.
It is most often seen in adults 75 years or older.
About one in three adults can do this the first time they try it.
Often treatment is not as successful in older children and adults.
It is the second most common cause of back pain in children and young adults.
