The study examined 22 people in their 30's who had used methamphetamine for 10 years, mostly by smoking it, and 21 controls matched for age.

If people use methamphetamine, they may take too much and get sick or, rarely, die.

Ms. Carroll said she had not used methamphetamine since Jan. 7, 2003.

Or at least, these dentists said, they do not report such pain while still using methamphetamine.

But it has become increasingly clear, they say, that often the relatives, too, are cooking or using methamphetamine.

His former girlfriend Simonne Butler said he used methamphetamine from at least 2001.

The latest statistics show that more than 35 percent of the people going to Iowa prisons last year reported using methamphetamine.

And 90 percent of the people being committed to the mental health facilities in Polk County have used methamphetamine.

None of the Indians charged are accused of using or making methamphetamine.

In the Explore study, researchers also monitored drug use, and found that about 20 percent of the subjects reported using methamphetamine.