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Bad batch refers to there being too much baking soda in the crack or drugs that are made incorrectly which forces individuals to overdose.
Boston Police say they believe a bad batch of “molly” is being sold in the Northeast after the synthetic drug was blamed for a rash of overdoses in Massachusetts and New York.

Woman in critical condition is seventh victim of particularly bad batch of drug' at Manchester's Warehouse Project club
by BeeeeTeeee November 22, 2013
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