ANSWER: Food

Lettuce

Lactucarium is the milky fluid secreted by several species of lettuce, especially Lactuca virosa, usually from the base of the stems. Lactucarium is known as lettuce opium because of its sedative and analgesic properties. It has been reported to promote a mild sensation of euphoria, but Lactuca virosa is poisonous, and at least one fatality has occurred during an attempt to use it for intoxication. Because it is a latex, Lactucarium physically resembles opium, in that it is excreted as a white fluid and can be reduced to a thick smokable solid.

Matt: WRONG
Record: 457-394