… of Unused Medications Prevents Drug Thefts, Abuse, and Overdoses SAN FRANCISCO - Addictive prescription drugs that … prescription drugs, particularly opioid painkillers. 6.4 million Americans age 12 and over-2.4 percent of the … 350,000 pounds of unused medication. Nationwide, over 7.1 million pounds-more than 3,500 tons-of pills have been …