The use of a drug called spice--a synthetic substance that mimics the effects of marijuana--has sparked a troubling rise in visits to emergency departments and calls to poison control, the New York Times reports. Though the American Association of Poison Control Centers has seen a four-fold increase of spice-related cases this year compared to 2014, the number of reports has ramped up even further in recent weeks. Experts aren't sure whether the recent increase is due to more widespread use of spice or the rise of more potent versions, according to the Times. Due to the rise of the drug's popularity, however, one expert told the newspaper that many EDs have become familiar with the effects of certain varieties of spice and how to handle those cases. Article