Using life course charts to assess and compare trajectories of amphetamine type stimulant consumption in different user groups: a cross-sectional study

Lifetime Psychotropic Medication Use Among Service Members and Veterans With and Without History of Mild Traumatic Brain Injury: A Pilot Study

INTRODUCTION

Military Service Members, Veterans, and other patient populations who experience traumatic brain injury (TBI) may have increased risk of early neurodegenerative diseases relative to those without TBI history. Some evidence suggests that exposure to psychotropic medications may play a role in this association. The Long-term Impact of Military-relevant Brain Injury Consortium-Chronic Effects of Neurotrauma Consortium (LIMBIC-CENC) prospective longitudinal study provides an ideal setting to examine the effects of psychotropic medication exposure on long-term neurological health of those with and without mild TBI history. In this study, we sought to develop and pilot test a self-report electronic survey instrument to measure participants' psychotropic medication histories for use across LIMBIC-CENC study sites.

MATERIALS AND METHODS

We developed a new survey instrument measuring psychotropic medication history and fielded it among Service Members and Veterans enrolled in a single site of the LIMBIC-CENC study to evaluate response rates and patterns, and to compare survey responses to prescription data extracted from participants' Veterans Affair (VA) records. Descriptive statistics estimated survey respondents' lifetime psychotropic medication exposures by their TBI history and other demographic and clinical characteristics of interest. We also compared survey responses to participants' VA outpatient prescription records to estimate sensitivity and negative predictive values (NPVs) for participants' self-reported medication exposures relative to this single prescription data source.

RESULTS

Among 310 Veterans enrolled at the study site, 249 completed the survey (response rate = 80%), of whom 248 also had VA health records and were included in the analysis. Most (69%) had a history of mild TBI. Over three-fourths of survey respondents (78%) reported ever having used prescription opioids, 26% reported benzodiazepines, 50% reported muscle relaxants, 42% reported antidepressants, 13% reported non-benzodiazepine sedative-hypnotics, 15% reported stimulants, 7% reported mood stabilizers, and 6% reported antipsychotics. Veterans with, versus without, a history of mild TBI were more likely to self-report psychotropic medication history as well as have confirmed receipt of VA prescriptions for each medication class. Using VA records as a criterion standard, the sensitivity of the survey for detecting VA prescriptions ranged from 19% to 84%, while the NPVs ranged from 64% to 97%. Sensitivity and NPVs were similar for participants with, versus without, mild TBI history.

CONCLUSIONS

Service Members and Veterans may receive psychotropic medications from multiple sources over their lifetimes. Valid methods to examine and quantify these exposures among those with a history of TBI are important, particularly as we evaluate causes of neurodegenerative disorders in this population over time. The measurement of Veterans' lifetime psychotropic medication exposures using a self-report survey, in combination with health care records, holds promise as a valid approach, but further testing and refinement are needed.

Initiation Patterns and Transitions Among Adults Using Stimulant Drugs: Latent Transition Analysis

BACKGROUND

The fourth wave of the drug overdose epidemic in the United States includes increasing rates of stimulant-involved overdose. Recent studies of transitions leading to stimulant misuse have shown complex patterns that are not universally applicable because they have isolated individual populations or individual behaviors. A comprehensive analysis of transitions between behaviors and the associations with present-day problematic drug use has not been conducted.

OBJECTIVE

This study aims to determine whether adults from the general population who use stimulants initiate use through a heterogeneous combination of behaviors and quantify the association between these typologies with present-day problematic drug use.

METHODS

Individuals who have reported use of any stimulant in their lifetime were recruited from the 2021 Survey of Nonmedical Use of Prescription Drugs Program, a nationally representative web-based survey on drug use, to participate in a rapid follow-up survey about their past stimulant use. Individuals were asked which stimulants they used, the reasons for use, the routes of administration, and the sources of the stimulant. For each stimulant-related behavior, they were asked at what age, between 6 and 30 years, they initiated each behavior in a 6-year time window. A latent transition analysis was used to characterize heterogeneity in initiation typologies. Mutually exclusive pathways of initiation were identified manually by the researchers. The association of these pathways with present-day problematic drug use was calculated using logistic regression adjusted by the current age of the respondent.

RESULTS

From a total of 1329 participants, 740 (55.7%) reported lifetime prescription stimulant use and 1077 (81%) reported lifetime illicit stimulant use. Three typologies were identified. The first typology was characterized by illicit stimulant initiation to get high, usually via oral or snorting routes and acquisition from friends or family or a dealer (illicit experimentation). The second typology was characterized by low, but approximately equal probabilities of initiating 1-2 new behaviors in a time window, but no singular set of behaviors characterized the typology (conservative initiation). The third was characterized by a high probability of initiating many diverse combinations of behaviors (nondiscriminatory experimentation). The choice of drug initiated was not a strong differentiator. Categorization of pathways showed those who were only in an illicit experimentation status (reference) had the lowest odds of having severe present-day problematic drug use. Odds were higher for a conservative initiation-only status (odds ratio [OR] 1.84, 95% CI 1.14-2.94), which is higher still for those moving from illicit experimentation to conservative initiation (OR 3.50, 95% CI 2.13-5.74), and highest for a nondiscriminatory experimentation status (OR 5.45, 95% CI 3.39-8.77).

CONCLUSIONS

Initiation of stimulant-related use behaviors occurred across many time windows, indicating that multiple intervention opportunities are presented. Screening should be continued throughout adulthood to address unhealthy drug use before developing into full substance use disorders.

Characteristics of clients entering women-only substance use treatment services in New South Wales

BACKGROUND

Women experiencing substance use disorders face barriers to treatment, including childcare, stigma and lack of gender/trauma-informed programming. Several non-government organizations in New South Wales run women-only treatment services to address these needs.

OBJECTIVES

We aim to assess characteristics of women entering treatment in these services.

DESIGN

Data on client characteristics from six women-only non-government organization substance use disorder treatment services in New South Wales between 2014 and 2018 were extracted from a database containing demographics, drug use and treatment characteristics and psychological distress (Kessler-10 scale) of women entering the services. Logistic regression models were used to estimate unadjusted odds ratio and adjusted odds ratio for treatment completion and different drugs on entry.

RESULTS

Data were available for 1357 women. Most (91%) episodes were for residential treatment. Women's mean age was 35.4 years (standard deviation = 9.8; range = 17-67). Residential clients tended to be younger than non-residential clients (35.1 vs 38.5 years, p < 0.001). Methamphetamine (43%) and alcohol (32%) were the most reported principal drug of concern. Women (89%) reported high levels of psychological distress (median Kessler-10 scale score = 27.5, range = 10-50), highest for women reporting alcohol as their principal drug. Overall, 43% of episodes resulted in treatment completion, most commonly for women entering residential treatment (45% vs 22%, p < 0.001) and for alcohol treatment (adjusted odds ratio = 1.42; confidence interval = 1.07-1.90; p < 0.001). Women with Kessler-10 scale scores indicating anxiety or depression at treatment entry were less likely to complete treatment than those with lower scores (adjusted odds ratio = 0.56; confidence interval = 0.38-0.80; p < 0.001).

CONCLUSION

Women entering women-only residential treatment tend to be younger and report methamphetamine as principal drug of concern. Women enter treatment with high degrees of psychological distress. Women's services need to ensure their programmes can respond to diverse needs of younger women presenting with methamphetamine use disorder and older women with alcohol use disorder experiencing high levels of psychological distress.

Substance Use, Health, and Adverse Life Events amongst Amphetamine-Type Stimulant Users in North East England: A Cross-Sectional Study

Amphetamine-type stimulants (ATS) are the second most commonly used class of illicit drugs globally, yet there is limited understanding of which factors contribute to different pathways of ATS use. We sought to compare current, former, and exposed non-ATS users’ substance use, mental/physical health, and adverse life experiences. A cross-sectional survey, using computer-assisted personal interview software, was conducted between June 2018 and March 2019 in North East England. Quota-based sampling was used to recruit 389 individuals (aged 18 to 68; 52.6% male): 137 current ATS users; 174 former users; and 78 exposed non-users. Standardized screening questionnaires captured current/prior substance use. Participants self-reported diagnoses of selected physical and mental health disorders and specific adverse life experiences. Analysis used descriptive statistics and comparative tests (including chi-square, Kruskal–Wallis and Mann–Whitney U). Early exposure to illicit substances, challenging mental health, and certain adverse life experiences (such as growing up in statutory care) were more common in individuals currently using ATS compared to those who had never used or stopped using stimulants. Multi-level interventions are needed that address the mental health, social, and economic needs of people with dependent drug use. These could include targeted efforts to support children growing up under care, integrated mental health and substance use support, and joined-up substance use interventions reflective of wider structural factors.

Different phases of ATS use call for different interventions: a large qualitative study in Europe

BACKGROUND

Amphetamine-type stimulants (ATS) are globally widely used. Scientific literature generally defines four phases of substance use (initiation, continuation, increase and decrease); however, there is limited understanding of what influences these different phases of ATS use. The ATTUNE study investigated which factors shape individual phases of use, or ATS use patterns. In this article, we report on these phases into and out of ATS use, and propose a set of recommendations for prevention, harm reduction and treatment of the different phases of ATS use.

METHODS

Qualitative, semi-structured interviews (n = 237) were conducted in five different European countries with participants who had used ATS, varying from a few times in a lifetime to daily.

RESULTS

Amphetamine and MDMA were the most commonly used ATS. Yet, types of ATS used differed between the countries. We found that people who use ATS have various motives for and dynamic patterns of ATS use with alternating phases of increase, continuation, decrease and sometimes dependence. Cessation was pursued in different ways and for diverse reasons, such as mental health problems and maturing out. Availability seemed not an issue, regardless of the type of ATS, phase or country.

CONCLUSIONS

These findings demonstrate that tailor-made interventions are needed for the diverse types of people who use ATS and different phases or patterns of ATS use, to reduce possible harms of use. We recommended a set of interventions for the different ATS phases. These include drug checking services, peer-led information, self-management of ATS use, mental health support to help people cope with stressful life events and prevent uncontrolled use, and follow-up support after treatment.

Effects of Atomoxetine Hydrochloride on Regulation of Lifespan in Drosophila Model

Nootropics (smart drugs) are used by students to enhance cognitive performance which have been reported times in recent years. However, some of the nootropics are central nervous system stimulants which are very likely to lead to addiction or complications such as vomiting and dizziness. Are there nootropics that can improve learning behavior while having potential positive effect on health? Here, we reported that Atomoxetine (ATX) has sex-specific effect on prolonging the life span of female Drosophila melanogaster. Further study indicated that ATX enhanced female resistance to heat stress and their vertical climbing ability, but it did decrease the number of eggs laid. ATX increased food-intake and sleep time both of females and males, and significantly reduced the 24h spontaneous activity of females and males. Our results present the sex dimorphic effect of ATX on life span regulation in Drosophila, and support further research on the beneficial role of ATX and the mechanisms in other animal models.

'The Drugs Did For Me What I Couldn't Do For Myself': A Qualitative Exploration of the Relationship Between Mental Health and Amphetamine-Type Stimulant (ATS) Use

Substance use and mental ill health constitute a major public health burden, and a key global policy priority is to reduce illicit and other harmful substance use. Amphetamine-type stimulants (ATS) are the second most used class of illicit drugs and a range of mental health issues have been documented amongst users. This paper explores the relationship between mental health and ATS use, through a thematic analysis of qualitative interviews with n = 18 current and former ATS users in England. The findings are presented by trajectory point of; (1) Initiation of ATS use; (2) continued and increased ATS use and (3) decreased and remitted ATS use. This work helps to develop understanding around the complex and bi-directional relationship between ATS use and mental health. Many ATS users lead chaotic lives and engage in multiple risk behaviours, however there is a need to better understand and conceptualise the dynamic interaction between different individual, social, environment and cultural factors that determine individuals’ mental health and substance use. There is no ‘one size fits all’ approach to prevention and treatment, and these findings highlight the need for more joined-up, tailored and holistic approaches to intervention development.

Polysubstance use classes and health outcomes among women attending specialist substance use treatment services

INTRODUCTION

Substance use is increasingly prevalent among women. Little research examines subgroups of women with substance use issues to identify their characteristics and thus enable treatment recommendations. The present study used latent class analysis to identify subgroups of substance use among women in substance-use treatment based on use in the 30 days prior to intake and examined changes in mental health and treatment outcomes following 60 days of treatment.

METHODS

Participants were women (N = 493) attending specialist non-government substance use treatment services in New South Wales, Australia.

RESULTS

Four distinct classes of substance users were identified: (i) Amphetamine Type Stimulants (ATS) Polysubstance (40.6%, n = 200); (ii) Alcohol Only (33.1%, n = 163); (iii) Cannabis and Alcohol (17.0%, n = 84) and (iv) Other Polysubstance (9.3%, n = 46). Women in the ATS Polysubstance class were the youngest and those in the Alcohol Only class were the oldest.

DISCUSSION AND CONCLUSIONS

Findings show that classes with high polysubstance use (ATS Polysubstance) differed from the single-substance use class (Alcohol Only). The ATS Polysubstance class had significantly greater improvements in health outcomes after 60 days compared to the Alcohol Only class. These findings suggest that although women with polysubstance use can benefit from substance use treatment, younger women (ATS Polysubstance) may benefit even more than older women (Alcohol Only). Future research should utilise a longitudinal design and examine additional psychosocial characteristics to extend on current findings.

Relapse risk factors for patients with comorbid affective disorders and substance abuse disorders from an intensive treatment unit

BACKGROUND AND OBJECTIVES

The prevalence of substance use disorders (SUD), particularly involving opiates and benzodiazepines, has increased to the detriment of public health and the economy. Here, we evaluate relapse factors among the high-risk demographic of patients with SUD and comorbid affective disorders.

METHODS

A retrospective chart review of 76 patients discharged after detoxification and simultaneous psychiatric care for concomitant affective disorders and SUDs. Relapse was assessed by two independent evaluators via postdischarge chart review, which included state-wide healthcare utilization, by patient, through healthcare information exchange systems. A Cox Hazards analysis was performed to characterize relapse risk factors.

RESULTS

Benzodiazepine use, admission through the emergency department (ED) rather than direct admission, frequent ED use in the preceding year, and history of prior attendance at multiple detoxification programs were risk factors for shortened time-to-relapse. Polysubstance use and intravenous drug use prolonged time to relapse.

DISCUSSION AND CONCLUSIONS

Notable findings include the significant relapse risk associated with benzodiazepine abuse and frequent prior ED utilization. These risk factors could reflect a number of underlying mediators for relapse, including anxiety, disease burden, and malingering. Additionally, this study recapitulates the observation in other patient populations that the majority of health resource utilization is attributed to a small population of patients.

SCIENTIFIC SIGNIFICANCE

This study is the first to identify relapse predictors among dual-diagnosis affective disorder and SUD patients in survival analysis, and replicates the alarming and largely unknown effect that benzodiazepines have on increasing relapse risk.

Analyse biografischer Ereignisse bei unterschiedlichen Gruppen von Konsumierenden amphetaminartiger Substanzen in Deutschland: Eine qualitative Studie

Hintergrund Amphetaminartige Stimulanzien (ATS; so wie Amphetamin, Methamphetamin und 3,4-Methylenedioxymethamphetamin (MDMA oder Ecstasy) und Ritalin) sind die zweithäufigsten konsumierten Substanzen in Europa. Dennoch liegen nur wenige Studien dazu vor, unter welchen Bedingungen sich unterschiedliche Konsummuster von ATS entwickeln. Um die Konsumverläufe bei 6 unterschiedlichen Konsumgruppen zu untersuchen, wurde die europäische ATTUNE Studie durchgeführt. Anhand der in Deutschland durchgeführten 60 qualitativen Interviews werden die biografischen Hintergründe vor dem Einstieg in einen ATS Konsum und die damit verbundenen Lebensereignisse im Lebenslauf untersucht.

Methodik Die Entwicklungsbedingungen vor dem Einstieg wurden im Gruppenvergleich zwischen aktuell konsumierenden und aktuell abstinenten ATS-Abhängigen, häufigen, gelegentlichen und nicht ATS Konsumierenden analysiert. Begleitend zum Interview wurden Life Course Charts eingesetzt, mit denen alle wichtigen Lebensereignisse dokumentiert wurden. Die durchschnittliche Anzahl positiver, neutraler und negativer Lebensereignisse im Lebenslauf wurde für die Gruppen und nach Geschlecht ermittelt und durch non-parametrische Verfahren ausgewertet.

Ergebnisse ATS-Abhängige waren im Vergleich zu allen anderen Gruppen vor Konsumbeginn signifikant stärker durch negative Lebensereignisse wie der Alkoholabhängigkeit eines Elternteils und Gewalterfahrungen belastet. Frauen waren deutlich belasteter als Männer. Stabile Entwicklungsbedingungen durch familiäre Fürsorge, Freunde und eine Ausbildung wiesen primär die häufigen und gelegentlichen ATS Konsumierenden auf. In diesen Gruppen dominierten zudem positive Ereignisse im gesamten Lebenslauf. Frühe und fortgesetzte Belastungen stellen einen hohen Risikofaktor für die Entwicklung eines problematischen ATS Konsums dar, während positive Lebensereignisse eine protektive Wirkung haben.

Schlussfolgerungen Da sich abhängige und nicht-abhängige ATS Konsumierende in ihren Unterstützungsbedürfnissen unterscheiden, müssen präventive Maßnahmen auf die jeweiligen Konsummuster abgestimmt sein .Hierzu zählen Nightlife-Präventionsangebote durch peers für einen ATS Konsum im Partysetting sowie spezifische Beratungs-und Behandlungsangebote für diejenigen mit einem abhängigen und oder problematischen Konsum. Angesichts der hohen Belastung von Frauen durch negative Lebensereignisse besteht der Bedarf nach frauenspezifischen Angeboten.

Longitudinal patterns of cocaine use among patients receiving injectable hydromorphone or diacetylmorphine for the treatment of opioid use disorder: A growth curve modeling approach

BACKGROUND AND AIMS

Cocaine use is prevalent among people receiving injectable opioid agonist treatment. Investigations of cocaine use in this population have been descriptive and the potential heterogeneity existing in patterns of use have not been characterized. As such, among patients receiving injectable opioid agonist treatment, this study aimed to: 1) quantify intra- and inter-individual variation in cocaine use over 24-months and; 2) determine how predictors of interest explained this variation.

METHODS

Participants were patients receiving injectable opioid agonist treatment for opioid use disorder. Study visits were completed at baseline prior to receiving treatment, and 3,6,9,12,18, and 24 months after baseline. A multi-level regression approach to growth curve modeling was employed to estimate and explain intra- (within-person) and inter-individual (between-person) variation in cocaine use.

RESULTS

Significant intra and inter-individual variation in cocaine use was identified over 24-months. Treatment engagement was on average associated with reductions in the prior month number of days of cocaine use (range: 0-30)(Estimate (standard error): -0.05(0.02), p = 0.003). On average, men reported less cocaine use compared to women (Estimate (standard error): -5.91(1.57), p=<0.001), and participants reporting ever regularly using cocaine at baseline reported more cocaine use over 24-months compared to participants reporting never regularly using cocaine (Estimate (standard error): 4.72 (1.91), p = 0.013).

CONCLUSIONS

Significant reductions in cocaine use were observed and significant heterogeneity in patterns of cocaine use was identified. These heterogeneous cocaine use profiles suggest that an individualized approach to care will be critical in responding to patients' cocaine use in injectable opioid agonist treatment.

A novel surface-enhanced Raman scattering method for simultaneous detection of ketamine and amphetamine

As common psychotropic drugs, ketamine (KET) and amphetamine (AMP) are often consumed by drug users at the same time, which seriously threatens people's health. Therefore, the study of simultaneous detection methods for KET and AMP is imperative. In this study, a novel method for the simultaneous detection of KET and AMP in serum was established on the basis of surface-enhanced Raman scattering (SERS). The antibodies were attached on Au@Ag core–shell nanoparticles embedded with different Raman reporters as the detection substrates. The labelled antigens KET–BSA and AMP–BSA were linked to carboxyl magnetic beads, and by adopting the principle of competitive immunoassay, the quantitative detections of ketamine and amphetamine were realized at the same time by detecting the Raman signals at different characteristic peaks on the magnetic beads. A good correlation was shown between ketamine and amphetamine and Raman signal response values were in the concentration range of 0–60 ng mL⁻¹ and 0–200 ng mL⁻¹, and the limits of detection were 1.64 and 2.44 ng mL⁻¹. This method had the advantages of simple, rapid operation, and high sensitivity, and can realise double indicator simultaneous detection, which provided a more favorable scientific basis for preventing or reducing drug abuse, and identifying and monitoring drug users.

Successfully synthesized Au-4MBA@Ag and Au-XP013@Ag. By detecting the Raman signal on the magnetic beads, the ketamine and amphetamine simultaneous detection was finally realized.