In the movie “Blow,” Johnnie Depp’s character snorted a LOT of cocaine. Despite their reputations, it’s clear that an actor could not inhale the real stuff in take after take. So what do they use?
This site says Depp used powdered milk in that movie. (look at the news for 4/5/01)
as Zipper says, powdered milk is the most common but there are substitutes for vegans or lactose intelorant actors. I believe I read that soda has been used or cornstarch. Powdered milk was laso what was used in Boogie Nights (according to the audio commentary everyone in that scene got really sick).
Sometimes, with a little camera trickery, they don’t have to snort anything- shot of guy rolling up a bill, CU on the end of the bill sucking up powder, guy leans back and wipes his nose.