Rates of Marijuana Use (AUDIO) Washington University School of Medicine Your browser does not support the audio element. Caption Marijuana use is on the rise in the United States, just not quite as much as previously reported. Last fall, a team of researchers reported that marijuana use had doubled among adults in the last decade, as had problems related to the drug. But now, a team from Washington University School of Medicine in St. Louis is reporting that although more adults are using marijuana, the jump in use is smaller, and the number of problems related to the drug doesn't seem to be rising at all. Jim Dryden has more on the story... Credit Washington University BioMed Radio Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.