The RCMP say the drug known as N-Bomb, Smiles and Smiley Paper has been linked to overdoses and deaths in other parts of Canada.
It looks like blotter LSD and mimics the effects of the hallucinogen.
They say it was previously sold as a research chemical, but can be up to 20 times more powerful than LSD.
Police say the fake version does not break down as quickly, increasing the chance of someone possibly overdosing or experiencing drug-induced psychosis.
The Canadian Press