Fentanyl overdose deaths are surging among seniors, particularly in cases where the powerful opioid is mixed with stimulants like cocaine or methamphetamine, a new study says. Fentanyl-stimulant overdose deaths skyrocketed by an astonishing 9,000% during the past eight years, approaching rates found in younger adults, researchers reported Saturday at an American Society of Anesthesiologists' meeting in San Antonio, Texas. "A common misconception is that opioid overdoses primarily affect younger