A growing number of Californians in their 20s are ending up in the emergency room because of heroin, according to the Los Angeles Daily News.

In the first three months of last year, 412 adults ages 20 to 29 went to the emergency room in California because of heroin—double the number for the same period in 2012. While heroin-related emergency room visits increased among all ages, the largest increase was among young adults.

According to Dr. Crescenzo Pisano, an internist who specializes in addiction and addiction medicine at Providence Little Company of Mary Medical Center in San Pedro, young people start misusing prescription opioids and then turn to heroin. “People price themselves out of range,” he said. “Relatively affluent, well-to-do kids start stealing and find heroin is cheaper to use.”