Opiate is an EP by American rock band Tool. It was produced and engineered by Sylvia Massy and former Minor Threat bassist Steve Hansgen. Released in 1992, it was the result of some two years of the band playing together after their formation in 1990. Opiate preceded Tool's first full-length release, Undertow, by a year. It is named after a quote by Karl Marx: "religion ... is the opiate of the masses". As of July 7, 2010, Opiate has sold 1,155,000 copies in the US and is certified Platinum by the RIAA. The EP charted on several international charts when Tool released their catalog to online streaming in August 2019.