Review Article

Relationship between Nonmedical Prescription-Opioid Apply and Heroin Utilise

List of authors.
  • Wilson M. Compton, Grand.D., M.P.E.,
  • Christopher M. Jones, Pharm.D., 1000.P.H.,
  • and Grant T. Baldwin, Ph.D., One thousand.P.H.

Introduction

Figure one. Figure i. Age-Adapted Rates of Death Related to Prescription Opioids and Heroin Drug Poisoning in the Us, 2000–2014.

Data are from the Centers for Illness Control and Prevention.5

The nonmedical use of prescription opioids is a major public wellness event in the United States, both because of the overall high prevalence and considering of marked increases in associated morbidity and bloodshed.ane In 2014, a total of x.3 meg persons reported using prescription opioids nonmedically (i.east., using medications that were not prescribed for them or were taken just for the experience or feeling that they caused).2 Emergency section visits involving misuse or abuse of prescription opioids increased 153% betwixt 2004 and 2011, and admissions to substance-abuse treatment programs linked to prescription opioids more than than quadrupled between 2002 and 2012.3,4 Virtually troubling, between 2000 and 2014 the rates of death from prescription-opioid overdose nearly quadrupled (from 1.5 to 5.9 deaths per 100,000 persons) (Effigy 1).

The blueprint of nonmedical use of prescription opioids varies, from exceptional employ one time or twice per yr to daily or compulsive heavy use and habit. A fundamental underlying characteristic of the epidemic is the association betwixt the increasing rate of opioid prescribing and increasing opioid-related morbidity and mortality.6-ix Pain has also been identified as a poorly addressed clinical and public health problem for which treatment with prescription opioids may play an important function.x Taken together, these trends propose the need for counterbalanced prevention responses that aim to reduce the rates of nonmedical utilize and overdose while maintaining access to prescription opioids when indicated.

In response to these interrelated public wellness bug, federal, country, and other vested interests are implementing a variety of policies and programs aimed at curbing inappropriate prescribing.one,6,eleven-16 These efforts include educating health professionals and the public most advisable apply, implementing prescription-drug monitoring programs, taking enforcement and regulatory deportment to accost egregious prescribing (east.chiliad., eliminating "pill mills"), and developing prescription opioids that contain abuse-deterrent technologies.

Although more rigorous evaluation is needed, in that location are some indications that these initiatives are commencement to show some success. A recent study showed that the rate of opioid prescribing in the United States stabilized between 2010 and 2012, with some medical specialties showing declines in the charge per unit of opioid prescribing after consistent increases for a number of years.17 States and localities that took the most decisive action are seeing a decrease in the availability of prescription opioids coupled with a decline in the charge per unit of deaths from overdose.thirteen-15 Using national information, the Centers for Disease Control and Prevention reported that there were xvi,007 and xvi,235 overdose-related deaths in 2012 and 2013, respectively, involving opioid analgesic agents, downwardly from a meridian of 16,917 deaths in 2011; however, the 18,893 deaths reported in 2014 advise connected concerns.5 Some other study showed that abuse of prescription opioids increased between 2002 and 2010 and and then plateaued betwixt 2011 and 2013.xviii

Coinciding with these efforts to reduce nonmedical prescription-opioid utilize and overdose are reports of increases in the rates of heroin use (including both injection and noninjection routes of administration) and deaths from heroin overdose. According to national surveillance information, 914,000 people reported heroin utilize in 2014, a 145% increase since 2007,2 and mortality due to heroin overdose more than than quintupled, from 1842 deaths in 2000 to x,574 deaths in 2014.five Some researchers advise that the very policies and practices that have been designed to address inappropriate prescribing are now fueling the increases in rates of heroin use and death.16,18 This is the key question addressed in this review.

Some persons certainly apply heroin when they are unable to obtain their preferred prescription opioid; withal, whether the increases in heroin trends in the overall population are driven by changes in policies and practices regarding prescription opioids is much less articulate. As an alternative explanation, nosotros explore the complexity and reciprocal nature of this relationship and review the pharmacologic basis for heroin apply amongst people who use prescription opioids nonmedically, the patterns of heroin utilise amidst people who utilise prescription opioids nonmedically, the current trends in heroin apply and their correlates, and the effects on heroin use of policies aimed at curbing inappropriate prescribing of opioids. A clearer understanding of these relationships will help to guide clinical practice and public wellness interventions and avoid the error of simply shifting the problem from one drug to another.

Pharmacologic Similarities of Heroin and Prescription Opioids

Heroin is pharmacologically similar to prescription opioids. All these drugs produce their action through endogenous opioid systems that regulate a wide range of functions through three major types of G-protein–coupled receptors: mu, delta, and kappa, with particularly potent agonist activity at the mu receptor and weak activity at the delta and kappa receptors.19,twenty Mu-receptor activation by an agonist such as heroin or a prescription opioid triggers a complex cascade of intracellular signaling events, which ultimately lead to an increment in dopamine release in the trounce of the nucleus accumbens.19,20 The resulting burst of dopamine in this critical surface area of the reward circuitry becomes strongly coupled with the subjective "loftier" that is caused past drugs of abuse.21

The abuse liability of an opioid is determined by multiple factors, including the lipophilicity of the drug (i.e., its ability to cross the blood–brain barrier rapidly), its binding affinity for the mu receptor, and diverse pharmacokinetic and physicochemical characteristics (east.g., the ease with which it can exist abused by means of injection and insufflation routes of assistants).22,23 Thus, although prescription opioids and heroin both accept the potential to utilise similar pharmacologic mechanisms to induce euphoria (or analgesia), unlike opioid molecules have unlike euphorigenic properties and withdrawal-syndrome patterns.

These factors could likewise influence the potential for abuse of the various opioid drugs, because opioid drug–taking behavior is probable to exist influenced by the remainder between positive and negative subjective ratings engendered past a specific opioid. For example, a report involving heroin abusers showed that the reinforcing effects of oxycodone were like to those produced by morphine or heroin, simply unlike morphine or heroin, oxycodone produced no "bad" effects in the participants in the study.23 Like considerations may help explain why several prescription opioids — such as hydromorphone, fentanyl, morphine, and oxycodone — accept a potential for abuse that is similar to, and in some cases even higher than, the potential for abuse with heroin.22,23 Finally, these differential properties and effects are likely to interact with interindividual variability in powerful, circuitous, and incompletely anticipated ways, then that some persons who corruption prescription opioids could find heroin less rewarding than prescription opioids, similarly rewarding, or even more rewarding.24,25

Heroin Use among People Who Use Prescription Opioids Nonmedically

Studies that accost the patterns of heroin utilize in nonmedical users of prescription opioids are generally observational and descriptive (i.e., nonexperimental). Thus, conclusions near cause and outcome are uncertain. All the same, certain consistent findings of a positive association betwixt nonmedical employ of prescription opioids and heroin use are highly suggestive and plausible, given the common pharmacologic principles described above.

Using national-level information, Becker et al. found that heroin users were 3.9 times equally likely to study nonmedical utilize of opioids in the previous year, and ii.ix times as likely to meet the criteria for abuse or dependence on opioids, as persons who did not utilize heroin.26 Grau et al. found that nonmedical use of multiple opioids was associated with transitioning to heroin.27 Similarly, Muhuri et al. found that the incidence of heroin use among people who reported prior nonmedical use of prescription opioids was nineteen times as high equally the incidence among persons who reported no previous nonmedical utilise.28 Additional studies involving persons from various geographic, economic, and drug-using backgrounds have shown similar associations.29-33

A limited number of small studies examined the sequence of and trajectories from nonmedical employ of prescription opioids to heroin apply. In 2003, Siegal et al. were among the outset to suggest the pathway from nonmedical utilise of opioids to heroin apply.34 They found that in Ohio, fifty% of persons 18 to 33 years of age who had recently begun using heroin reported having abused opioids, primarily OxyContin, earlier initiating heroin use.34 A larger study involving immature urban people who used injected heroin in New York and Los Angeles in 2008 and 2009 showed that 86% had used opioids nonmedically before using heroin.35 Like studies conducted in San Diego, Seattle, and New York showed that xl%, 39%, and 70% of heroin users, respectively, reported that they had used prescription opioids nonmedically before initiating heroin use.36-38

Trajectory analysis of patterns of nonmedical utilise of prescription opioids suggests that persons well-nigh often start with oral nonmedical utilise of opioids. They move to more efficient routes of administration, such as insufflation, smoking, or injection, as tolerance to opioids develops and information technology becomes more costly to maintain their abuse patterns. By the time they initiate heroin use, usually through contact with drug users, sexual partners, or drug dealers, they view heroin as reliably bachelor, more than potent, easier to manipulate for nonoral routes, and more cost-effective than prescription opioids.34-36,38-41

In an effort to examine whether the findings from these small studies were consistent with findings in the broader population of nonmedical users, the sequence regarding initiation of utilise was assessed with the use of both treatment-population data and general-population information. Among heroin users inbound substance-corruption treatment programs, Cicero et al. constitute significant shifts in the pattern of the first opioid used past those with recent onset as compared with those started using opioids 40 to fifty years ago.41 Amid persons who began their opioid utilise in the 1960s, more than eighty% reported that their first opioid was heroin; conversely, in the 2000s, a total of 75% of users initiated opioid utilise with prescription opioids.41

Using national-level, full general-population data, Jones institute that in the period from 2008 through 2010, among people who used both prescription opioids for nonmedical reasons and heroin during the previous yr, 77.four% reported using prescription opioids before initiating heroin utilise.42 Similarly, Muhuri and colleagues found that 79.5% of persons who recently began using heroin had used prescription opioids nonmedically before initiating heroin use.28 Both studies showed that heroin apply was most common among persons who were frequent users of nonmedical opioids.28,42 A contempo study with data through 2013 showed that prescription-opioid abuse or dependence was associated with a likelihood of heroin abuse or dependence that was 40 times as great equally the likelihood with no prescription-opioid abuse or dependence, even after bookkeeping for sociodemographic, geographic, and other substance abuse or dependence characteristics.43 These studies suggest a clear link between nonmedical utilise of prescription opioids and heroin use, especially amid persons with frequent nonmedical apply or those with prescription-opioid abuse or dependence.

Current Trends in Heroin Use and Their Correlates

Figure 2. Figure 2. Nonmedical Utilize of Prescription Opioids and Heroin during the Previous Year among Noninstitutionalized Persons 12 Years of Age or Older, 2002–2014.

Data are from the Center for Behavioral Health Statistics and Quality.ii

Table 1. Table 1. Annual Average Rates of Heroin Use during the Previous Year, According to Substance-Use Feature and Fourth dimension Menses, in the United States, 2002–2013.

Heroin employ has been increasing in the Usa for the by 10 years, peculiarly since 2007 (Effigy 2), an increase that has occurred in the context of broad use of multiple substances.43 As seen in Table 1, in addition to the 138.9% increase in heroin utilise among nonmedical users of prescription opioids between the period of 2002–2004 and the flow of 2011–2013, heroin use increased 97.5% among nonmedical users of other prescription drugs (stimulants, tranquilizers, and sedatives), 87.3% amidst users of cocaine, 57.3% among people who binge drink, and 45.4% among marijuana users.43 Moreover, heroin users increasingly report abuse of or dependence on other substances.43 There have likewise been shifts in the demographic characteristics associated with heroin use; the rate has increased particularly steeply amongst persons 18 to 25 years of age, and increases take been observed in both large urban areas and other geographic regions, in both sexes but more among women than amongst men, and in all races and ethnic groups but more among not-Hispanic whites than amongst others.43

Tabular array 2. Table two. Demographic and Substance-Use Characteristics Associated with Heroin Abuse or Dependence during the Previous Year in the United States, 2011–2013.

Table two shows the sociodemographic, geographic, and substance-apply groups that are associated with the greatest risk of heroin corruption or dependence during the previous year in the menstruation of 2011–2013.43 Other studies accept shown that contempo cohorts of heroin users entering treatment take been likely to exist white, center-class, and living in nonurban areas; this result mirrors the populations that have had the largest increases in rates of nonmedical utilize of prescription opioids since 2002.2,41,42,44 These findings are mostly consistent with those from a number of smaller studies.34-40

A key factor underlying the recent increases in rates of heroin employ and overdose may be the low price and high purity of heroin.45,46 The price in retail purchases has been lower than $600 per pure gram every twelvemonth since 2001, with costs of $465 in 2012 and $552 in 2002, as compared with $1237 in 1992 and $2690 in 1982.45 A contempo study showed that each $100 subtract in the cost per pure gram of heroin resulted in a 2.ix% increment in the number of hospitalizations for heroin overdose.46 In addition, regions of the U.s. that are not typically centers for heroin distribution or availability have seen marked increases in contempo years.47,48

In the context of marked increases in the rates of heroin use, information technology is important to notation that only a pocket-sized percentage of nonmedical users of prescription opioids initiate heroin use. Muhuri and colleagues establish that 3.six% of nonmedical users initiated heroin apply within 5 years afterwards beginning nonmedical use of prescription opioids.28 Jones et al. institute that approximately four.2% of persons who had used prescription opioids nonmedically during the previous twelvemonth in the period of 2011–2013 also reported using heroin during the previous year.43 Of note, given the large number of nonmedical users, even a pocket-sized per centum who initiate heroin use translates into several hundred grand new heroin users. Yet, taken in total, the available information suggest that nonmedical prescription-opioid utilize is neither necessary nor sufficient for the initiation of heroin apply and that other factors are contributing to the increase in the rate of heroin employ and related mortality.

Furnishings of Opioid-Prescribing Interventions on Heroin Use

Multiple studies that have examined why some persons who abuse prescription opioids initiate heroin use signal that the cost and availability of heroin were main factors in this process. These reasons were more often than not consistent across time periods from the tardily 1990s through 2013.34-41 Some interviewees made reference to doctors generally being less willing to prescribe opioids also as to increased attention to the effect by police enforcement, which may have affected the available supply of opioids locally.38,40 It should exist noted that near of these studies were conducted earlier 2009 — a fourth dimension when few policies targeting opioid prescribing were implemented.

It appears that the shift toward heroin use amongst some nonmedical users of prescription opioids was occurring earlier the recent policy focus on prescription-opioid abuse took hold. This ascertainment is supported by data on heroin use reported to U.S. poison control centers that show increases starting in 2006,18 also equally national surveillance data that show a rise in heroin use starting in 2007.two Similarly, a study examining hospitalizations for heroin overdose between 1993 and 2009 showed that the charge per unit of such hospitalizations increased 69% between 1993 and 2006 and so rose more than sharply, by 44%, betwixt 2005 and 2009.49 Furthermore, this study showed that these increases occurred in the context of continued increases in the charge per unit of hospitalization for overdose of prescription opioids.

The results of the studies by Sprint et al. and Cicero et al. propose an association between the introduction of an corruption-deterrent formulation of OxyContin and increases in rates of heroin utilize.16,18 Sprint et al. plant evidence that rates of heroin use increased later the introduction of the abuse-deterrent conception, but they also reported that the rate of heroin use was increasing previously.18 Cicero et al. institute that a decrease in the rate of OxyContin corruption corresponded with an increase in the charge per unit of heroin use over the 2 years after the introduction of the abuse-deterrent conception.16 Withal, in a follow-upwardly study, Cicero and Ellis found that over the ensuing 18 months, the rates of OxyContin corruption no longer decreased whereas the rates of heroin use continued to increase.50 Moreover, a separate study involving patients who were being screened for substance-abuse handling showed no pregnant differences between the prevalence of heroin use before the introduction of the reformulation and the prevalence after the reformulated drug was available.51

5 recent quantitative studies provide boosted insights into the relationship betwixt opioid-prescribing policies and practices and heroin utilise and overdose. First was an assay of deaths due to overdose in North Carolina betwixt 2007 and 2013, which documented a shift toward an increasing risk of death due to heroin use.52 However, the shift began in 2009, before changes such every bit the introduction of corruption-deterrent formulations of opioids were in effect.52 The second study showed that heroin-related emergency section visits, hospital admissions, and overdose deaths in Wisconsin started to increase in 2007.53 Furthermore, these increases in rates of heroin overdose were superimposed on continued increases in rates of prescription-opioid overdoses through 2012.53

The third study examined deaths from overdose in Florida through 2012.13,54 Florida had a well-documented prescription-opioid problem.54 Between 2010 and 2011, Florida instituted a series of major policy changes that were designed to reduce the inappropriate supply of prescription opioids. After these policies were implemented, prescriptions were curtailed and the rate of death from prescription-opioid overdose declined 27% between 2010 and 2012.13,54 Moreover, these significant declines in prescription-opioid mortality were accompanied by an increase of only lx deaths related to heroin, with the overall number of full deaths from overdose declining by 535 between 2010 and 2012.thirteen

The fourth written report, which examined opioid overdoses in New York, showed a 29% reduction in the charge per unit of death from prescription-opioid overdose coupled with declines in the rates of overall and high-dose opioid prescribing in Staten Island, New York, in 2013 afterwards the implementation of targeted and full general public health initiatives, including a heavy focus on prescribing behaviors.fifteen Importantly, these decreases were not offset by increases in bloodshed from heroin-involved overdose during the aforementioned time menstruum.15

Finally, in an investigation of deaths related to heroin and prescription-opioid use in 28 states betwixt 2010 and 2012, Rudd and colleagues establish no clan between declines in prescription-opioid–related mortality and increases in heroin-related mortality.55 In fact, they found that increases in the rates of death due to heroin overdose were associated with increases in the rates of death due to prescription-opioid overdose in these states.55

Although none of these studies can disprove a potential human relationship between policies that are aimed at decreasing the availability of inappropriately prescribed opioids and the motivation for heroin utilize in some people, the results of these studies consistently suggest that the transition to heroin use was occurring earlier most of these policies were enacted, and such policies do not announced to have direct led to the overall increases in the rates of heroin use.

Conclusions

Bachelor information betoken that the nonmedical use of prescription opioids is a stiff take chances factor for heroin use. Yet, although the majority of electric current heroin users written report having used prescription opioids nonmedically earlier they initiated heroin use, heroin use among people who apply prescription opioids for nonmedical reasons is rare, and the transition to heroin use appears to occur at a low rate.

The transition from nonmedical utilize of prescription opioids to heroin use appears to exist office of the progression of addiction in a subgroup of nonmedical users of prescription opioids, primarily among persons with frequent nonmedical use and those with prescription opioid corruption or dependence. Although some authors suggest that there is an clan betwixt policy-driven reductions in the availability of prescription opioids and increases in the rates of heroin use,16,18 the timing of these shifts, many of which began before policies were robustly implemented, makes a causal link unlikely.

In the bulk of studies, the increase in the rates of heroin use preceded changes in prescription-opioid policies, and there is no consistent evidence of an association betwixt the implementation of policies related to prescription opioids and increases in the rates of heroin use or deaths, although the information are relatively thin. Alternatively, heroin market forces, including increased accessibility, reduced price, and high purity of heroin appear to exist major drivers of the recent increases in rates of heroin use.46,56 Regardless of the causes of the high rates of both nonmedical prescription-opioid apply and heroin use, in order to minimize overall opioid-related morbidity and mortality, efforts are needed to aid people who are already addicted, in parallel with efforts to forestall people from becoming addicted in the commencement place.

Addressing the combined and interrelated opioid epidemics requires comprehensive activeness, including the prevention of the initiation of nonmedical use of opioids, interventions for persons who take clinically significant complications from opioid employ, and improved handling for those with opioid-utilise disorders. Prevention efforts should target the major risk factors for the initiation of opioid utilize, including the excess availability of prescription opioids; these risk factors may be addressed with policy and practice interventions such equally the enhanced use of prescription-drug monitoring programs and the development of clinical guidelines to educate clinicians.fourteen,57 Universal family-based drug-corruption prevention, which has been shown to reduce the rates of initiation of nonmedical use of prescription opioids, may likewise play an important office.58 Whether the opioid is heroin or a prescription medication, interventions to reduce morbidity and mortality include expanded admission to naloxone in contexts in which overdoses occur59-61 and increased utilize of effective treatment for opioid-use disorders, particularly medication-assisted handling administered for an adequate duration.62-65

Fundamentally, prescription opioids and heroin are each elements of a larger epidemic of opioid-related disorders and decease. Viewing them from a unified perspective is essential to improving public health. The perniciousness of this epidemic requires a multipronged interventional approach that engages all sectors of society.14,66

Funding and Disclosures

Disclosure forms provided past the authors are bachelor with the total text of this article at NEJM.org.

Dr. Compton reports holding stock in Full general Electric, 3M, and Pfizer. No other potential conflict of interest relevant to this article was reported.

The views expressed in this commodity are those of the authors and do not necessarily correspond those of the National Found on Drug Abuse, the National Institutes of Health, the Food and Drug Administration, the Centers for Disease Control and Prevention, or the Department of Health and Human Services.

We thank multiple federal colleagues who provided suggestions and input into the drafting of the manuscript.

Author Affiliations

From the National Institute on Drug Corruption, National Institutes of Health, Bethesda (W.Thou.C.), and the Food and Drug Assistants, Silverish Bound (C.M.J.) — both in Maryland; and the Segmentation of Unintentional Injury Prevention, Centers for Disease Control and Prevention, Atlanta (Yard.T.B.).

Address reprint requests to Dr. Compton at the National Institute on Drug Corruption, National Institutes of Wellness, 6001 Executive Blvd., MSC 9581, Bethesda, MD 20892-9581, or at [email protected].

Supplementary Cloth

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