“…Among those with cocaine use disorders, 31% reported previous suicide attempts ( Darke & Kaye, 2004), and the prevalence of cocaine use is reported as 20% in completed suicides in New York City (Marzuk et al, 1992). Methamphetamine-dependent individuals are reported to have high rates of depression and suicidal ideation (Kalechstein et al, 2000;Zweben et al, 2004), and in one study of suicide completers done in Utah, the prevalence of methamphetamine found by toxicology screens was 9% in youth and 8% in adults (Callor et al, 2005). Studies have also implicated polysubstance use and intravenous drug use as predictors of a higher prevalence of suicidal behavior as compared to nonintravenous drug or alcohol use disorders (Havens, Sherman, Sapun, & Strathdee, 2006;Wilcox, Conner, & Caine, 2004).…”