I controlled substances , a category reserved for unsafe , highly abused substances with no medical usage . The DEA announced in November it was taking action to temporarily ban five chemicals . Hide Caption 1 of 11 Photos: The DEA says use of synthetic pot has led to physical and behavioral problems . Fake pot has already been banned in 18 states .
The DEA announced in November it was taking action to temporarily ban five chemicals . Hide Caption 1 of 11 Photos: The DEA says use of synthetic pot has led to physical and behavioral problems . Fake pot has already been banned in 18 states .