"According to the Medical Expenditure Panel Survey, the annual share of US adults who were prescribed opioids decreased from 12.9 percent in 2014 to 10.3 percent in 2016, and the decrease was concentrated among adults with shorter-term rather than longer-term prescriptions. The decrease was also larger for adults who reported moderate or more severe pain (from 32.8 percent to 25.5 percent) than for those who reported lessthan-moderate pain (from 8.0 percent to 6.6 percent).

"Of the 70,237 drug overdose deaths in the United States in 2017, approximately two thirds (47,600) involved an opioid (1). In recent years, increases in opioid-involved overdose deaths have been driven primarily by deaths involving synthetic opioids other than methadone (hereafter referred to as synthetic opioids) (1). CDC analyzed changes in age-adjusted death rates from 2017 to 2018 involving all opioids and opioid subcategories* by demographic characteristics, county urbanization levels, U.S. Census region, and state.

"Objective: To examine the effect on the trade in opioids through online illicit markets (“cryptomarkets”) of the US Drug Enforcement Administration’s ruling in 2014 to reschedule hydrocodone combination products.

"Design: Interrupted time series analysis.

"Setting: 31 of the world’s largest cryptomarkets operating from October 2013 to July 2016.

"With a total of 38 different opioids reported, the number of synthetic opioids has grown rapidly in Europe since the first substance was reported in 2009. In fact, most of these substances have been reported for the first time during the past two years, with 9 reported in 2016 and 13 during 2017.

"In this nationwide study of commercially insured adolescents, LTOT [Long Term Opioid Therapy] was relatively uncommon. The estimated incidence of LTOT receipt was 3.0 per 1000 adolescents within 3 years of filling an initial opioid prescription. Although adolescents with a wide range of preexisting mental health conditions and treatments were modestly more likely than adolescents without those conditions or treatments to receive an initial opioid, the former had substantially higher rates of subsequent transitioning to LTOT.

"Over the 15-year study period, 335,123 opioid-related deaths in the United States met our inclusion criteria, with an increase of 345% from 9489 in 2001 (33.3 deaths per million population) to 42,245 in 2016 (130.7 deaths per million population). By 2016, men accounted for 67.5% of all opioid-related deaths (n = 28,496), and the median (interquartile range) age at death was 40 (30-52) years.

According to the United Nations Office on Drugs and Crime:

In the United States in 2015 (the most recent year for which data are available), the wholesale price of black tar heroin ranged from $12,000 to $100,000 per kilogram; the wholesale price of South American heroin ranged from $10,000 to $100,000 per kilogram and the price of southwest Asian heroin ranged from $50,000 to $85,000 per kilogram.

In Mexico in 2015 (the most recent year for which data are available), the wholesale price of heroin was $35,000 per kilogram.

"Among the 42 249 opioid-related overdose deaths in 2016, 19,413 involved synthetic opioids, 17,087 involved prescription opioids, and 15,469 involved heroin. Synthetic opioid involvement in these deaths increased significantly from 3007 (14.3% of opioid-related deaths) in 2010 to 19,413 (45.9%) in 2016 (P for trend <.01). Significant increases in synthetic opioid involvement in overdose deaths involving prescription opioids, heroin, and all other illicit or psychotherapeutic drugs were found from 2010 through 2016 (Table).

"The use of MC [Medical Cannabis] as an alternative to POMs [Prescription Opioid Medications] for pain management warrants additional empirical attention as a potential harm reduction strategy. NASEM (2017) recommends more clinical trials to elucidate appropriate MC forms, routes of administration, and combination of products for treating pain, but access to MC products to fully evaluate these questions is challenging due to federal regulations.

"The opioid epidemic is a public health crisis that is at least partially driven by harms associated with POM [Prescription Opioid Medication] use. States are passing laws allowing use of MC [Medical Cannabis] and patients are using MC, but currently there is little understanding of how this influences POM use or of MC-related harms. This literature review provides preliminary evidence that states with MC laws have experienced reported decreases in POM use, abuse, overdose, and costs.