From oxycodone to heroin: two cases of transitioning opioid use in young Australians

Mental Health and Psychosocial Needs of Patients Being Treated for Opioid Use Disorder in a Primary Care Residency Clinic

Purpose: Primary care is an ideal setting to deliver efficacious treatments for opioid use disorder (OUD). Primary care providers need to be aware of other concerns patients with OUD might have in order to provide comprehensive care. This study describes the prevalence of mental health, comorbid substance use, and psychosocial concerns of patients seeking treatment for OUD in primary care and their relation to 6-month treatment retention. Methods: Patients (N = 100; M age = 34.9 years (SD = 10.8), 74% white, 46% female) with OUD who were starting treatment with buprenorphine at an academic family medicine residency clinic completed surveys of mental health concerns (depression, anxiety, trauma), psychosocial needs (food insecurity, income, transportation, employment), and demographic variables. Chart reviews were conducted to gather information on comorbid substance use, mental health diagnoses, and 6-month treatment retention. Results: Mental health symptoms were highly prevalent in this sample (44% screened positive for anxiety, 31% for depression, and 52% for posttraumatic stress disorder). Three-quarters reported use of illicit substances other than opioids. Many patients also had significant psychosocial concerns, including unemployment (54%), low income (75%), food insecurity (51%), and lacking reliable transportation (64%). Two-thirds (67%) of the sample were retained at 6 months; patients who previously used intravenous opioids were more likely to discontinue treatment (P = .003). Conclusions: Many patients receiving treatment for OUD have significant mental health problems, comorbid substance use, and psychosocial concerns; interestingly, none of these factors predicted treatment retention at 6 months. Primary care clinics would benefit from having appropriate resources, interventions, and referrals for these comorbid issues in order to enhance overall patient well-being and promote recovery.

Prophylactic vaccination protects against the development of oxycodone self-administration

Abuse of prescription opioids is a growing public health crisis in the United States, with drug overdose deaths increasing dramatically over the past 15 years. Few preclinical studies exist on the reinforcing effects of oxycodone or on the development of therapies for oxycodone abuse. This study was conducted to determine if immunopharmacotherapy directed against oxycodone would be capable of altering oxycodone-induced antinociception and intravenous self-administration. Male Wistar rats were administered a small-molecule immunoconjugate vaccine (Oxy-TT) or the control carrier protein, tetanus toxoid (TT), and trained to intravenously self-administer oxycodone (0.06 or 0.15 mg/kg/infusion). Brain oxycodone concentrations were 50% lower in Oxy-TT rats compared to TT rats 30 min after injection (1 mg/kg, s.c.) whereas plasma oxycodone was 15-fold higher from drug sequestration by circulating antibodies. Oxy-TT rats were also less sensitive to 1-2 mg/kg, s.c. oxycodone on a hot water nociception assay. Half of the Oxy-TT rats failed to acquire intravenous self-administration under the 0.06 mg/kg/infusion training dose. Oxycodone self-administration of Oxy-TT rats trained on 0.15 mg/kg/infusion was higher than controls; however under progressive ratio (PR) conditions the Oxy-TT rats decreased their oxycodone intake, unlike TT controls. These data demonstrate that active vaccination provides protection against the reinforcing effects of oxycodone. Anti-oxycodone vaccines may entirely prevent repeated use in some individuals who otherwise would become addicted. Vaccination may also reduce dependence in those who become addicted and therefore facilitate the effects of other therapeutic interventions which either increase the difficulty of drug use or incentivize other behaviors.

Nonmedical prescription opioid use and illegal drug use: initiation trajectory and related risks among people who use illegal drugs in Vancouver, Canada

Objective

We investigated the prevalence of and risk factors associated with initiating nonmedical prescription opioid use (NMPOU) before and after illegal drugs using data from two linked cohort studies of street youth and adults who use illegal drugs in Vancouver, Canada. All participants who attended a study visit between 2013 and 2016 were eligible for the primary analyses.

Results

Among 512 youth and 833 adult participants, the prevalence of NMPOU was extremely high (88% among street youth; 90% among adults), and over one-third of those who reported engaging in NMPOU had initiated NMPOU before illegal drug use (vs. transitioning from illegal drugs to NMPOU). Participants who reported either transitioning to or from NMPOU had higher risk profiles, particularly related to substance use, when compared with those who reported never engaging in NMPOU. Sub-analyses restricted to only those who engaged in NMPOU found few statistically significant differences between those who initiated NMPOU prior to illegal drugs versus those who initiated illegal drugs prior to NMPOU. Findings suggest that among people who use illegal drugs, early NMPOU trajectories do not appear to critically shape future patterns and practices.

Electronic supplementary material

The online version of this article (10.1186/s13104-018-3152-9) contains supplementary material, which is available to authorized users.

The experience of initiating injection drug use and its social context: a qualitative systematic review and thematic synthesis

BACKGROUND AND AIM

Understanding the experience of initiating injection drug use and its social contexts is crucial to inform efforts to prevent transitions into this mode of drug consumption and support harm reduction. We reviewed and synthesized existing qualitative scientific literature systematically to identify the socio-structural contexts for, and experiences of, the initiation of injection drug use.

METHODS

We searched six databases (Medline, Embase, PsychINFO, CINAHL, IBSS and SSCI) systematically, along with a manual search, including key journals and subject experts. Peer-reviewed studies were included if they qualitatively explored experiences of or socio-structural contexts for injection drug use initiation. A thematic synthesis approach was used to identify descriptive and analytical themes throughout studies.

RESULTS

From 1731 initial results, 41 studies reporting data from 1996 participants were included. We developed eight descriptive themes and two analytical (higher-order) themes. The first analytical theme focused on injecting initiation resulting from a social process enabled and constrained by socio-structural factors: social networks and individual interactions, socialization into drug-using identities and choices enabled and constrained by social context all combine to produce processes of injection initiation. The second analytical theme addressed pathways that explore varying meanings attached to injection initiation and how they link to social context: seeking pleasure, responses to increasing tolerance to drugs, securing belonging and identity and coping with pain and trauma.

CONCLUSIONS

Qualitative research shows that injection drug use initiation has varying and distinct meanings for individuals involved and is a dynamic process shaped by social and structural factors. Interventions should therefore respond to the socio-structural influences on injecting drug use initiation by seeking to modify the contexts for initiation, rather than solely prioritizing the reduction of individual harms through behavior change.

Geospatial Analysis of Drug Poisoning Deaths Involving Heroin in the USA, 2000-2014

We investigate the geographic patterns of drug poisoning deaths involving heroin by county for the USA from 2000 to 2014. The county-level patterns of mortality are examined with respect to age-adjusted rates of death for different classes of urbanization and racial and ethnic groups, while rates based on raw counts of drug poisoning deaths involving heroin are estimated for different age groups and by gender. To account for possible underestimations in these rates due to small areas or small numbers, spatial empirical Baye's estimation techniques have been used to smooth the rates of death and alleviate underestimation when analyzing spatial patterns for these different groups. The geographic pattern of poisoning deaths involving heroin has shifted from the west coast of the USA in the year 2000 to New England, the Mid-Atlantic region, and the Great Lakes and central Ohio Valley by 2014. The evolution over space and time of clusters of drug poisoning deaths involving heroin is confirmed through the SaTScan analysis. For this period, White males were found to be the most impacted population group overall; however, Blacks and Hispanics are highly impacted in counties where significant populations of these two groups reside. Our results show that while 35-54-year-olds were the most highly impacted age group by county from 2000 to 2010, by 2014, the trend had changed with an increasing number of counties experiencing higher death rates for individuals 25-34 years. The percentage of counties across the USA classified as large metro with deaths involving heroin is estimated to have decreased from approximately 73% in 2010 to just fewer than 56% in 2014, with a shift to small metro and non-metro counties. Understanding the geographic variations in impact on different population groups in the USA has become particularly necessary in light of the extreme increase in the use and misuse of street drugs including heroin and the subsequent rise in opioid-related deaths in the USA.

Down in the valley: Trajectories of injection initiation among young injectors in California's Central Valley

BACKGROUND

Injection drug use initiation represents a critical point of public health intervention, as injection increases risk for blood borne infections including Hepatitis C and HIV. In this paper, we explore pathways to injection initiation among youth (≤30) in the rural context of California's Central Valley, where rates of injection drug use are among the highest in the nation.

METHODS

We draw on semi-structured qualitative interviews with 20 young injectors to examine drug use histories, including the factors that participants associated with their transition to injection drug use.

RESULTS

The average age was 24.7 years (range: 20-30), 45% were female (n=9), and 30% were Latino (n=6). Participants described a variety of pathways to injection, culminating in a first injection that involved either opioids (n=12) or methamphetamine (n=8). Among the opioid group, the majority used prescription opioids before transitioning to injection, while a smaller number transitioned to opioid injection from non-opioid recreational drug use. Injectors who first used prescription opioids often described growing up in affluent suburban areas and transitioned to injection with peers, owing to a combination of factors related to individual tolerance, cost, and shifting drug markets. In contrast, methamphetamine initiates grew up in less affluent families with histories of substance use that exposed them to drugs at an early age. Methamphetamine users transitioned from smoking and snorting to injection, often with family members or intimate partners, within broader contexts of social disadvantage and stress.

CONCLUSION

While much of the focus on young injectors has centred on the current opioid epidemic, our data suggest a need to consider multiple pathways towards injection initiation of different drugs. Targeted interventions addressing the unique injection transition contexts of both opioids and methamphetamine are urgently needed in the Central Valley of California.

Self-limiting non-medical pharmaceutical opioid use among young people in Sydney, Australia: An exploratory study

INTRODUCTION AND AIMS

Indicators suggest an escalation in opioid use globally, with recent HIV outbreaks linked to non-medical pharmaceutical opioid (NMPO) use. Little is known about how young Australians engage in NMPO use.

DESIGN AND METHODS

During 2015, we conducted qualitative interviews with young people (16-29 years) who reported oral NMPO use at least twice in the past 90 days. The study included a sample of injecting (n = 14) and oral (n = 22) users. This paper focuses on the oral user group.

RESULTS

Most participants grew up in affluent areas of Sydney, reported few health problems, rarely accessed health or welfare services and had limited contact with police. NMPO use was part of a repertoire of drug use involving: (i) use to come down from stimulants; (ii) use in conjunction with cannabis and alcohol; and (iii) use by itself. Participants reported limiting their use in order to avoid stigma and dependence.

DISCUSSION AND CONCLUSIONS

Results suggest culture of self-limiting NMPO use characterised by stable housing, disposable income and intimate friendship networks. Despite the adverse health outcomes observed in other settings, our data suggest that the patterns and meanings of NMPO use observed in this small sample may help explain the limited nature of problematic use among young Australians to date. Findings indicate a need for epidemiological data, including longitudinal data, to assess possible demographic shifts in NMPO use in Australia, and to address risk factors for dependence and transitions to injecting and heroin use in this population. [Dertadian GC, Dixon TC, Iversen J, Maher L. Self-limiting non-medical pharmaceutical opioid use among young people in Sydney, Australia: An exploratory study. Drug Alcohol Rev 2017;00:000-000].

Circumstances and contexts of heroin initiation following non-medical opioid analgesic use in New York City

BACKGROUND

As the prevalence of opioid analgesic (OA) misuse and associated harms have increased in the United States, the prevalence of heroin use and rates of unintentional overdose have concurrently risen. Research has begun to identify connections between OA misuse and heroin use, although this relationship remains under explored. The present study explores the context of heroin initiation among persons with histories of OA misuse in New York City.

METHODS

In-depth interviews were conducted with 31 individuals with histories of OA misuse who initiated heroin use within the past five years. Data were collected between August 2013 and January 2015. All participants' OA misuse temporally preceded their heroin use. Interviews were coded and analyzed utilizing thematic qualitative methods.

RESULTS

Participants ranged in age from 18 to 44 years; 25 identified as male and 30 identified as non-Hispanic white and heterosexual. All participants had stable housing at the time of interview and all were high school graduates. Participants described several key points of transition along their trajectories from OA misuse to heroin initiation: dual- to single-entity OAs; oral to intranasal OA administration; and the development of physical opioid dependence. Participants described the breaking down of heroin-related stigma across social networks as new drug use permeated social groups.

CONCLUSION

Several points of transition were identified in participants' trajectories from OA misuse to heroin initiation. In particular the development of physical dependence was a critical factor as existing heroin stigma was rapidly overcome in the face of opioid withdrawal. The relatively short time to heroin initiation documented among new user groups serves as an added challenge to the development of interventions.

An Ageing Methadone Population: A Challenge to Aged Persons' Mental Health Services?

Oral administration of methadone has been used as a treatment strategy for opiate addiction for many years. The state of Victoria, Australia, has a long-running methadone program with a large number of participants. Accordingly, a growing number of adults have utilised methadone maintenance treatment for a number of years and are now moving into older age due to advances in medical treatment and harm reduction initiatives. The objective of this review is to examine the literature pertaining to co-occurring mental illness in older methadone treatment participants and to explore the future challenges this growing cohort of ageing adults pose to aged persons’ psychiatry services. As part of a broader study into dual diagnosis in older adults, a search of the Scopus, ProQuest, and CINAHL journal databases was performed. Twenty abstracts from literature published within the previous 15 years (1999–2014) were identified that explored methadone maintenance programs and the older adults maintained on them. A number of researchers have identified the ageing methadone population to have a high degree of comorbid mental illness and psychological distress. Studies also indicate that individuals enrolled in methadone maintenance programs may engage in a degree of continual substance use, potentially leading to deleterious effects on their psychosocial function. An ageing methadone population experiencing a high degree of comorbid mental illness is likely to challenge aged persons’ psychiatry services. These services are likely to be increasingly called on to manage these individuals, particularly within Victoria where few substance use services exist for those over the age of 65. It is essential that aged persons’ psychiatry services prepare to provide care for these individuals in a responsive manner that is inclusive of both their mental health and substitution pharmacotherapy.