Understanding the dangers of the fake marijuana called 'Spice' or 'K2'

Jeffery Moran and colleagues note that synthetic marijuana, often marketed as "natural incense," "potpourri," Spice or K2, is a significant public health concern, and 1 in 9 high school seniors admit recent use. The products appear across the United States and Europe, and are the second most popular drug after real marijuana for many American teens and young adults. The substances produce a "high," but also can cause a wide range of dangerous side effects including seizures, hallucinations, severe kidney damage, psychotic behavior and heart attacks. Scientists are quickly playing catch-up to understand how these fake pot products work in order to identify them in users' urine and to treat the devastating health effects, which, in some cases, plague users for months after they initially take it.

To gain insight into the effects of designer marijuana products, Moran's team developed a new method and used it to study how the body processes two popular forms in Spice and K2, known as JWH-018 and AM2201. Urine samples from 15 people who tested positive for use showed significant differences in how the individuals' bodies processed the drugs. This finding could help explain why some people experience more severe effects from the drugs than others.