Definition of Diversion of Licit, Legally Prescribed Drugs: "'Drug diversion' is best defined as the diversion of licit drugs for illicit purposes. It involves the diversion of drugs from legal and medically necessary uses towards uses that are illegal and typically not medically authorized or necessary."
illicit versus licit
"In 2016, an estimated 6.2 million Americans aged 12 or older misused psychotherapeutic drugs at least once in the past month, which represent 2.3 percent of the population aged 12 or older (Figures 18 and 19). Of the four categories of prescription drugs that are presented in this report, prescription pain relievers were the most commonly misused by people aged 12 or older. The 6.2 million people aged 12 or older who misused prescription psychotherapeutic drugs in the past month included 3.3 million who misused prescription pain relievers in that period.