Sara Moniuszko Thu, September 14, 2023 Overdose deaths in the U.S. involving fentanyl and stimulants have increased more than 50-fold since 2010, a new study found. Published in the peer-reviewed journal Addiction Thursday, researchers say 235 deaths due to this mix of drugs occurred in 2010 (0.6%) compared with 34,429 deaths in 2021 (32.3%). “We’re...