There is considerable evidence linking perpetrators' substance use with unfavorable outcomes among victims of intimate partner violence. Little is known, however, about the relationship between substance use by both the perpetrators and the victims and the victims' outcomes. Using interview data from 117 women who have experienced abuse by their partners, this study examines the association of both perpetrators' and victims' substance use with victim outcomes through a series of hierarchical multiple regressions. Substance use by both perpetrators and victims was not significantly related to increased risk of victims' physical injuries, but was significantly associated with poorer victim functionality after an intimate partner violence incident. Tables, references, and appendixes (Published Abstract)