Synthetic cannabis is a chemically engineered substance similar to THC, the active ingredient in marijuana. It is typically herbs sprayed with chemicals and gives a similar high to marijuana. Popular brands include K2, Spice, and others. Synthetic cannabis is sold at gas stations, smoke shops, and online, though some states have banned it. Reported side effects include feeling disoriented, tense, and like doing cocaine. While the high is similar to marijuana, it does not last as long. Synthetic cannabis has already been banned in several states and countries due to safety concerns.