ON THE STREET THEY CALL IT Grievous Bodily Harm. That ominous nickname may be lousy shorthand for gamma hydroxybutyrate (GHB), but it's a tragically accurate description of the nation's hot new party ...

GHB seems to "constantly keep reinventing itself" and attract new groups of users, said Dr. Alex Stalcup, an addiction specialist in Concord, Calif., who first noticed in the late 1980s that habitual ...