Use of and barriers to access to opioid analgesics: a worldwide, regional, and national study.

BACKGROUND: Despite opioid analgesics being essential for pain relief, use has been inadequate in many countries. We aim to provide up-to-date worldwide, regional, and national data for changes in opioid analgesic use, and to analyse the relation of impediments to use of these medicines. METHODS: We calculated defined daily doses for statistical purposes (S-DDD) per million inhabitants per day of opioid analgesics worldwide and for regions and countries from 2001 to 2013, and we used generalised estimating equation analysis to assess longitudinal change in use. We compared use data against the prevalence of some health disorders needing opioid use. We surveyed 214 countries or territories about impediments to availability of these medicines, and used regression analyses to establish the strength of associations between impediments and use. FINDINGS: The S-DDD of opioid analgesic use more than doubled worldwide between 2001-03 and 2011-13, from 1417 S-DDD (95% CI -732 to 3565; totalling about 3.01 billion defined daily doses per annum) to 3027 S-DDD (-1162 to 7215; totalling about 7.35 billion defined daily doses per annum). Substantial increases occurred in North America (16,046 S-DDD [95% CI 4032-28,061] to 31,453 S-DDD [8121-54,785]), western and central Europe (3079 S-DDD [1274-4883] to 9320 S-DDD [3969-14,672]), and Oceania (2275 S-DDD [763-3787] to 9136 S-DDD [2508-15,765]). Countries in other regions have shown no substantial increase in use. Impediments to use included an absence of training and awareness in medical professionals, fear of dependence, restricted financial resources, issues in sourcing, cultural attitudes, fear of diversion, international trade controls, and onerous regulation. Higher number of impediments reported was significantly associated with lower use (unadjusted incidence rate ratio 0.39 [95% CI 0.29-0.52]; p<0.0001), but not when adjusted for gross domestic product and human development index (0.91 [0.73-1.14]; p=0.4271). INTERPRETATION: Use of opioid analgesics has increased, but remains low in Africa, Asia, Central America, the Caribbean, South America, and eastern and southeastern Europe. Identified impediments to use urgently need to be addressed by governments and international agencies. FUNDING: International Narcotics Control Board, UN.

Trends in the consumption of opioids for the treatment of severe pain in Europe, 1990-2016.

BACKGROUND: Over the last decades, consumption of opioids for the treatment of pain increased steadily in the United States, Australia, and a few European countries. To date, no study has analysed time trends in opioid consumption across Europe. METHODS: We analysed data provided by International Narcotics Control Boards on the consumption of fentanyl, oxycodone, morphine, hydromorphone and pethidine in 40 European countries over the last decade. Trends in total opioid consumption from 1990 to 2016 in 22 selected European countries, the European Union (EU) as a whole, and, for comparison purpose, the United States, were analysed using the joinpoint regression analysis. RESULTS: In 2014-2016, opioid use was >10,000 defined daily doses for statistical purposes (s-DDD) per 1,000,000 inhabitants die in Western/Northern countries, whereas it was <1000 s-DDD in Southern/Eastern ones. In most European countries, opioid consumption increased to a great extent between 2004-2006 and 2014-2016; it rose from 6,477 to 8,967 s-DDD (+38.4%) in the EU, and from 14,598 to 16,491 s-DDD (+13%) in the United States. The increase in opioid use was steady since the early to mid-1990s in most European countries and it slowed down after the mid- to late 2000s. In Denmark, Finland, France, Ireland, Switzerland, Poland and the EU, opioid use levelled off or declined over most recent years. CONCLUSIONS: Consumption of opioid analgesics sharply increased in most of European countries since the early to mid-1990s. This notwithstanding, in the mid-2010s there was still a more than 10-fold difference between the highest consumption in Western/Northern countries and the lowest one in Southern/Eastern countries. SIGNIFICANCE: This study provides an updated and comprehensive analysis of time trends and geographic variations in opioid consumption use across European countries over the last three decades.