Canadian border agents seize large quantity of chemical used in date rape drug Canada Border Services Agency officers in B.C. say they have seized a large shipment of restricted chemicals, including a quantity of the controlled chemical substance used to produce GHB, the so-called date rape drug. Social Sharing CBC News · Posted: May 13, 2021 12:55 PM PT | Last Updated: May 13 Canadian Border Services Agency officers seize a marine container of nearly 18,000 litres of the controlled chemical substance known to be used in the production of the so-called date-rape drug GHB.(Jeff McIntosh/The Canadian Press)