Substance Abuse Research Articles

Morality boundary work in the making of the needle and syringe exchange program in Stockholm

Background Drug policy is prone to build on rationales based on different moralities rather than evidence. Less is known about how moralities influence drug policy implementation in practice. The aim was to analyze expressions of moralities among local policy-makers, professionals, and drug users in the context of the Stockholm needle and syringe exchange program (NSP). Methods Using political documentation from Stockholm (2003–2016), focus group (12 NSP staff), and 32 drug user interviews, moralities concerning drug policy and harm reduction were analyzed based on moral foundations theory and boundary work. Results Three main moral dilemmas were identified concerning the subjects, aims, and orientation of drug policy: whether drug users are worthy of inclusion to society; if the general public should be prioritized or the health of drug users, and the orientation of practices as based on control or autonomy. Policy debate was driven by virtues such as purity and authority, whereas staff and drug users valued care, fairness and liberty. Conclusions The prohibitionist and abstinence-oriented Swedish drug policy has created social boundaries on the practice-level. Hence, users’ perspectives, and those who care about them, should be extensively involved in political discussions to foster a more moral and humane drug policy.

Root causes behind patient safety incidents in the emergency department and suggestions for improving patient safety - an analysis in a Finnish teaching hospital.

Adverse events occur frequently at emergency departments (ED) because of several risk factors related to varying conditions. It is still unclear, which factors lead to patient safety incident reports. The aim of this study was to explore the root causes behind ED-associated patient safety incidents reported by personnel, and based on the findings, to suggest learning objectives for improving patient safety. The study material included incident reports (n = 340) which concerned the ED of a teaching hospital over one year. We used a mixed method combining quantitative descriptive statistics and qualitative research by inductive content analysis and deductive Ishikawa root cause analysis. Most (76.5%) incidents were reported after patient transfer from the ED. Nurses reported 70% of incidents and physicians 7.4%. Of the reports,40% were related to information flow or management. Incidents were evaluated as no harm (29.4%), mild (46%), moderate (19.7%), and severe (1.2%) harm to the patient. The main consequences for the organization were reputation loss (44.1%) and extra work (38.9%). In the qualitative analysis, nine specific problem groups were found: insufficient introduction, adherence to guidelines and protocols, insufficient human resources, deficient professional skills, medication management deficiencies, incomplete information transfer from the ED, language proficiency, unprofessional behaviour, identification error, and patient-dependent problems. Six organizational themes were identified: medical staff orientation, onboarding and competence requirements; human resources; electronic medical records and information transfer; medication documentation system; interprofessional collaboration; resources for specific patient groups such as geriatric, mental health, and patients with substance abuse disorder. Entirely human factor-related themes could not be defined because their associations with system factors were complex and multifaceted. Individual and organizational learning objectives were addressed, such as adherence to the proper use of instructions and adequate onboarding. System factors caused most of the patient safety incidents reported concerning ED. The introduction and training of ED -processes is elementary, as is multiprofessional collaboration. More research is needed about teamwork skills, patients with special needs and non-critical patients, and the reporting of severe incidents.

Analysing loneliness forum posts, the comments they elicit, and the responses to these comments

In May 2023, the United States surgeon general put out an advisory suggesting that loneliness and social isolation should be tackled and prioritized like health conditions such as substance abuse. Online loneliness forums provide a platform for users experiencing loneliness to engage with, share experiences/concerns, and seek support from others. On these forums, users (posters) publish support seeking posts and other users respond by either reacting to these posts and/or writing comments in which they provide support. In some cases, the posters respond to and engage with the comments that their posts elicit; understanding these interactions between posters and the comments their posts elicit can inform helpful communication strategies on online loneliness forums and online health forums, in general. Prior work on analyzing data from online loneliness forums did not study the interactions between posters and the comments their posts elicit. To address this, we present a dataset of posts and comments published in a 4 year time period i.e. from January 1 2019 to December 31 2022 on an online loneliness forum on Reddit. This dataset consists of (a) posts, (b) all the comments associated with these posts, (c) the comments that elicited responses from the posters, and (d) the responses of the posters to these comments. With this dataset, we conduct analysis using a topic modeling algorithm called BERTopic and a psycholinguistic dictionary called Linguistic Inquiry and word count (LIWC) to gain insights and elucidate the language markers associated with comments (to posts) that elicit responses from the posters. We find that as it relates to comments that received responses from posters, the following topic themes were associated with these comments i.e. relationships, empathy, and mental health concerns and the LIWC categories on second person pronoun, social processes, and present focus, were associated with these comments. We also find that the topic themes on appreciation was associated with the responses by posters to comments their posts received. We discuss these findings in the discussion section.

The role of childhood trauma and attachment state of mind in mothers’ birth experiences

ABSTRACT Negative birth experiences are common. It is yet unclear which women may be most at risk already before pregnancy. Childhood trauma and non-autonoumous/unresolved attachment state of mind may affect how women experience giving birth. This study used longitudinal data to test childhood trauma and attachment state of mind as predictors of birth experience in at-risk sample of primipara women (N = 193). The Adverse Childhood Experiences questionnaire and the Adult Attachment interview were administered during pregnancy, and women reported about their birth experience three months postpartum. Partial Least Square Structural Equation Modelling was applied to answer the research questions. Childhood physical neglect and parental substance abuse were predictive of a more negative birth experience, while attachment state of mind was not associated with how women experienced giving birth. Cross-validation suggests that these findings may be considered externally valid. Further research using validated measures on birth experience are needed.

Troponin Test, Not Only a Number: An Unusual Case of False Positive

Heterophile antibodies, which can arise from infections, autoimmune disorders, or exposure to animal antigens, can interfere with immunoassays. These antibodies can cross-react with the test reagents used in troponin assays, causing a false elevation in troponin levels. The paper describes a case of a 37-year-old male drug abuser admitted to the emergency room with chest pain. A series of troponin measurements performed using different assays gave discrepant results. Only thanks to the use of Scantibodies HBT tubes, which remove heterophile antibodies, was it possible to make a correct diagnosis of troponin negativity. In conclusion, a correct laboratory/clinical approach to the identification of heterophile antibody interference is essential for accurate troponin testing in order to avoid false positive results. Implementing neutralizing tests can significantly improve the reliability of these diagnostic assays, ensuring better patient outcome.

Minimal disease activity and associated factors in patients with psoriatic arthritis: cross-sectional study from a single center

IntroductionPsoriatic arthritis (PsA) is a heterogeneous disease with various manifestations such as dactylitis, enthesitis, spondylitis, and skin involvement. Minimal disease activity (MDA) has been successfully used in daily clinical practice and is considered a reasonable treatment target in patients with PsA. In this study, we aimed to evaluate the MDA status and associated factors in patients with PsA in our tertiary referral clinic.Material and methodsThis cross-sectional study included patients who met the CASPAR classification criteria and had at least 6 months of follow-up data between 2001 and 2021. Patients who met at least 5 of 7 criteria (tender joint count ≤ 1/68, swollen joint count ≤ 1/66, Psoriasis Area Severity Index [PASI] ≤ 1, Visual Analogue Scale [VAS] ≤ 15, patient global VAS ≤ 20, Health Assessment Questionnaire-Disability Index [HAQ-DI] ≤ 0.5, and enthesitis number ≤ 1) were considered to achieve MDA.ResultsData from 172 patients (61% female) were analyzed and included in the study. While most patients had polyarticular involvement (33.7%), mono-oligoarthritis was present in 30.2%, mixed type in 26.2%, isolated distal interphalangeal arthritis in 5.8%, isolated spondylitis in 2.9%, and arthritis mutilans in 1.2%. Overall, 95 (55.2%) of the patients were observed at MDA, which was lower in tumor necrosis factor inhibitor (TNFi) users compared to only conventional synthetic disease-modifying antirheumatic drug users. In univariate analysis, MDA was associated with higher patient age, longer psoriasis duration, late-onset PsA, and continued use of first TNFi. In multivariate analysis, higher patient age, late-onset PsA, and higher continuation rate of first TNFi were associated with MDA.ConclusionsIn the study, more than half of our patients achieved MDA status. A higher MDA rate was associated with a higher continuation rate at first-line TNFi treatment. The relatively large po­pulation who could not reach MDA status in our study indicates an unmet need for monitoring and treatment of PsA.

Neuroscientific Approaches to Understanding Adolescent Susceptibility to Substance Abuse

Adolescence is a pivotal developmental stage characterised by significant neurobiological changes that heighten susceptibility to substance abuse. This period is marked by the maturation of the brain regions responsible for decision-making and impulse control, alongside an increased sensitivity to rewards driven by dopaminergic pathways. This review aimed to understand adolescent susceptibility to substance abuse using a neuroscientific approach. In line with best practices, data were collected from a variety reliable source to ensure a comprehensive view of the topic. Research studies on adolescent neurodevelopment have contributed to a broader understanding of the physiological and psychological factors at play during adolescence, while grey literature, including expert interviews and focused group discussions, has offered practical insights from frontline professionals, such as psychologists, social workers, and healthcare providers, who deal directly with adolescent substance use. These results demonstrate that the relationship between genetic factors and environmental conditions, such as stress and trauma, intensifies this vulnerability, thereby heightening the likelihood of individuals participating in risky behaviours. This review examines the neuroscientific foundations of substance use during adolescence, highlighting the critical role of timely interventions that utilize neuroplasticity to enhance resilience and reduce risk. By integrating cognitive training and behavioural therapies into public health initiatives, adolescents' cognitive control mechanisms and their propensity for substance abuse can be reduced.

Impact of Cardiac Surgery Scar on Heart Rupture Following a Fall from Height

Death from falls accounts for a significant number of injuries and fatalities globally, often linked to suicides, workplace accidents, or substance abuse, and rarely to homicidal causes. Injuries from falls vary based on height, impact point, and surface struck, with severe trauma often seen, including visceral ruptures, organ lacerations, and complex fractures. Even minimal external injuries can mask severe internal damage, such as multiple organ ruptures, organ tears, and large vessel lacerations. Blunt cardiac injuries, which occur in 5% to 50% of falls, are significant, especially in falls over 6 m. In 70% of the cases, cardiac rupture is observed at the level of the posterior wall of the heart and occurs due to a contusive action on the heart during the diastolic filling phase. We report a case of a 29-year-old man (weight 95 kg) who died from an 11-meter fall. He had a history of cardiac surgery for the transposition of the great vessels, and an autopsy revealed extensive cardiac rupture, likely worsened by fibrotic adhesions anchoring the heart to the pericardium. Toxicological investigations on peripheral blood showed BAC > 2.58 g/L. Heart scars, macro- and microscopically as a deposit of fibrous tissue, due to previous surgery, may have contributed to the extent of the lesion, suggesting the need for further study on post-operative tissue changes and their effects on trauma from falls.

Teachers’ Perspectives on the Effectiveness of Moral Strategies for Character Formation in Public Secondary Schools in Kakamega County, Kenya

Philosophers and educationists contend that education plays a critical role in inculcating learners with moral values for character formation. Moral education for character formation is not an issue of personal choice but fundamental to society in promoting economic growth, prosperity, and order. However, there are a number of problems that hinder the process of reaching the identified ideal of character formation. Some of the challenges are associated curriculum content and the strategies applied by teachers. In school moral education for character formation is promoted through the teaching of subjects such as Christian Religious Education, Hindu Religious Education, or Islamic Religious Education, however they are exam or Cognitive oriented. This is manifested in unacceptable behaviors that are exhibited by students such as school arson, drugs and substance abuse, obscene behavior, and exploitation of school and other public resources. Therefore, this article sought to investigate teachers’ perspectives on the effectiveness of moral strategies for character formation in public secondary schools in Kakamega County, Kenya. Phenomenological theory guided this study. On the other hand, phenomenological hermeneutical method was applied in the study. The study employed a descriptive phenomenological research design to explore teachers' perceptions of moral education strategies for character formation in public secondary schools in Kakamega County, Kenya. This design was chosen because it enables the researcher gain insight into participants' lived experiences of a phenomenon without prejudices and preconceptions. It utilized an interpretive paradigm to understand teachers' perceptions of their social realities, focusing on subjective experiences and perspectives related to moral education. Purposive sampling was used to recruit 15 participants from seven public secondary schools. Unstructured interviews were employed to collect the data. The data collected was analyzed thematically using Braun and Clarke's six steps. The study established that there was mixed reaction on the effectiveness of strategies used in moral education for character formation. The minority of the participants observed that all the strategies were ineffective, while the majority indicated that guidance and counseling although less proactive, is the best strategy for moral education for character formation. The few who mentioned punishment indicated that it was the best method, although illegal and illicit in the current Kenyan schooling context. The study concluded that moral education strategies in public secondary schools in Kakakmega county, Kenya are largely ineffective, with only a few approaches like class meetings, student leadership, and clubs fostering deeper student engagement. Most strategies are implemented reactively and lack consistent emphasis, limiting their impact on character formation. To improve effectiveness, a more proactive approach and better implementation mechanisms are needed. The study recommends that teachers in Kakamega County be trained to use multiple moral strategies that require extensive student participation and include practical and reflective methods to promote character education. Moreover, moral education should be an integrated approach to ensure that students receive ethical education in many areas of learning to strengthen their morality in applying moral education in many facets of their learning.

From historical drugs to present perils: UHPLC-QqQ-MS/MS determination of methaqualone and its designer analogs (NPS) with comprehensive fragmentation pathways study (QTOF)

Methaqualone, introduced in the 1960s as a sedative-hypnotic alternative to barbiturates, was withdrawn from the market due to its side effects and growing recreational use. Despite this, interest in methaqualone and its analogs remains high, raising concerns about potential abuse in the future. An ultra-high-performance liquid chromatography method coupled with triple quadrupole tandem mass spectrometry (UHPLC-QqQ-MS/MS) was developed to determine nine methaqualone-related compounds simultaneously. Biological samples were prepared using liquid-liquid extraction with ethyl acetate at pH 9, quantification was performed in blood using multiple reaction monitoring (MRM) mode. Methaqualone-d7 served as an internal standard. The limit of quantification (LOQ) ranged from 0.1 to 0.2 ng/mL, with precision and accuracy within 20%. Recovery ranged from 84.2% to 113.7%. The developed method allowed chromatographic separation of all compounds tested, including two structural isomers: methtylmethaqualone and etaqualone. The mass spectra aquired from quadrupole time-of-flight mass spectrometer allowed for the elucidation of comprehensive fragmentation study of methaqualone derivatives. The described situation poses a significant problem from the analytical point of view, as well as interpretation and forensic toxicological expertise. The developed method will contribute to increased analytical capabilities and enhanced detection of compounds from the methaqualone group that may appear on the illicit market.

Experience with reduced-nicotine cigarettes and whether this decreases smoking and substitution for full-nicotine cigarettes.

Studies suggest that reduced-nicotine cigarettes decrease nicotine intake and dependence. However, questions remain about reduced-nicotine cigarette abuse liability, whether reduced-nicotine cigarette exposure lowers reduced- and full-nicotine cigarette use, and whether reduced-nicotine cigarettes substitute for full-nicotine cigarettes. This randomized, double-blind laboratory study used operant behavioral economics to examine abuse liability of cigarettes with varying nicotine content. Non-treatment-seeking smokers (N = 43) self-administered reduced- (5.2, 2.4, or 1.3 mg/g) and full-nicotine (15.8 mg/g) cigarettes before and after 3 weeks of at-home exposure. Participants were randomized to full-nicotine or one of the reduced-nicotine cigarettes to determine the effect of exposure on abuse liability and substitutability. Abuse liability was assessed in single-commodity sessions, and substitutability was measured in concurrent-commodity sessions. In the self-administration sessions, concurrently available reduced-nicotine cigarettes attenuated full-nicotine cigarette demand and rendered reduced-nicotine cigarettes partial substitutes for full-nicotine cigarettes. Exposure to study cigarettes for 3 weeks marginally reduced demand for reduced- and full-nicotine cigarettes irrespective of nicotine content. Results suggest a limited influence of nicotine content on smoking behavior in established smokers and highlight the role of nonpharmacological factors (e.g., taste/smell) on the maintenance of smoking. These results should be considered in determining whether a nicotine-reduction standard is a feasible path for reducing cigarette demand.

Social media plus profits spell danger for youth: NIDA director

Putting profits over public health is not endorsed by Nora Volkow, M.D., director of the National Institute on Drug Abuse (NIDA). She had some choice words for commercial interests involved in the addiction field in a brave Sept. 26 blog. Preying on the vulnerable — with drugs, social media, gambling, processed food, and other addictive products — is something she knows how to zone in on as an evil.

Enhancing Public Service Delivery through Digital Transformation: A Study on the Role of E-Government in Modern Public Administration

Digital transformation has become a crucial element in improving the quality of public service delivery, particularly through the implementation of e-government. This study aims to analyze the role of e-government in enhancing the effectiveness and efficiency of modern public administration. Using a qualitative research method through literature analysis and in-depth interviews with government employees across several public service agencies in Indonesia, this study explores the benefits and challenges faced in the implementation of e-government. The findings indicate that e-government significantly contributes to expediting public service processes, increasing transparency, and minimizing potential corruption and abuse of power. Furthermore, e-government enables more effective interagency collaboration through integrated information systems, positively impacting operational efficiency. However, the study also identifies obstacles to the adoption of e-government, such as limited digital infrastructure, resistance from government officials, and the digital divide in society, which can reduce its effectiveness. This study concludes that e-government can serve as a strategic instrument for public administration reform if supported by infrastructure improvements, human resource training, and increased public digital literacy. Consequently, e-government not only enhances the quality of public services but also strengthens accountability and public trust in the government. The study’s recommendations include strategies to improve information technology capacity, formulate policies that support digital transformation, and raise awareness and public participation in utilizing digital government services.

Fentanyl Initiation Rate Following the Requirement for Specialist Approval.

Healthcare organizations attempt to address unwarranted fentanyl use, which often leads to increased risk of addiction and overdose. To assess the impact of a requirement for a specialist's approval on fentanyl initiation for non-oncological pain. A retrospective cohort study based on observational data. All 4.4 million non-oncological members of Clalit Health Services were included, from July 20, 2021, to July 19, 2023. The rate of fentanyl initiation was assessed before and after the implementation of the requirement for specialist's approval, which was introduced on July 2022, and expanded 6months later for continued use. A sub-group analysis by age group was performed, and patient characteristics and indications were assessed. We also compared total opioid dispensation in the 6th and 12th months after the implementation with the predicted rate based on pre-implementation rates. Fentanyl initiation rate in the year before the requirement was 711 per million capita, which decreased following the requirement by - 81% (95% CI: - 77%; - 85%). The decrease attenuated with age. The prevalence of diagnosis with substance abuse disorders at the time of fentanyl initiation decreased from 6 to 3%. In the 6th and 12th months after the requirement was implemented, the morphine milligram equivalent (MME) from dispensation of total opioids was lower than predicted based on pre-implementation rates by 7% and 26%, respectively. Requiring specialist approval for fentanyl initiation for non-oncological chronic pain was associated with a decrease in fentanyl prescription initiations, especially among non-elderly patients. A decrease also occurred gradually in total opioid dispensations, further decreasing following the extension of the requirement to continuous fentanyl. The requirement for specialist approval upon fentanyl initiation and continuous fentanyl may present an effective tool for limiting the use of fentanyl and total opioids in healthcare systems.

Unveiling the dynamics of hepatitisC virus transmission among injection drug users and men who have sex with men: A comprehensive study in Japan.

In Japan, despite low nationwide hepatitisC (HCV) incidence, new infections among people who inject drugs (PWID) and men who have sex with men (MSM) hinder HCV elimination. We explored HCV transmission dynamics and screened HCV recombination within these populations. This cross-sectional study recruited HCV-infected patients from Osaka National Hospital, Osaka, Japan, from January 2010 to September 2023. Data from questionnaires and medical records were analyzed. Serum samples collected before anti-HCV treatment underwent HCV RNA extraction, and sequencing of full core (576bp) and NS5B (267bp) regions using the Sanger method. Genotype distribution was determined by phylogenetic analysis, and recombinant screening was conducted. A total of 115 patients were categorized into non-MSM PWID (31), MSM PWID (15), MSM non-PWID (25), and non-MSM non-PWID (44). Positive amplification rates were 99.1% (114/115) for the full-core region, and 96.5% (111/115) for NS5B. No intergenotypic recombination was detected. The predominant genotype in non-MSM PWID was 2a (58%), whereas genotype 1b was most common in MSM PWID, MSM non-PWID, and non-MSM non-PWID groups (79%, 64%, and 68%, respectively). Nucleotide sequence similarity of 94.75%-100% was found in HCV strains from MSM PWID and MSM non-PWID in both full-core and NS5B regions, whereas strains from non-MSM PWID and non-MSM non-PWID were distinct. The findings suggest that the transmission route in PWID is determined by MSM status, whereas MSM groups showed the same transmission route regardless of PWID. HCV control measures should be focused not only on PWID, but also on MSM to achieve HCV elimination in Japan.

Genomic Insights into Drug Abuse: The Role of DNA and Protein-Coding Regions in Addiction and Genetic Mutation

Abstract This paper explores the genetic and epigenetic impacts of drug abuse, focusing on how chronic drug use can induce mutations in DNA, particularly within protein-coding regions, and alter gene expression through mechanisms such as DNA methylation. The study highlights the significant role of these genetic changes in the brain's reward pathways, which contribute to the development and persistence of addiction. Through a comprehensive literature review, the paper identifies key genetic factors associated with addiction susceptibility and the long-term effects of drug-induced epigenetic modifications. A proposed research framework is presented, emphasizing the need for longitudinal studies to track epigenetic changes over time, targeted genomic analysis to identify critical mutations, and the integration of multi-omics approaches to provide a holistic understanding of drug abuse's impact on the genome. The paper also addresses ethical considerations, including the importance of protecting genetic privacy and preventing stigmatization based on genetic findings. The study concludes that advancing our understanding of the genetic and epigenetic mechanisms underlying addiction can lead to more effective, personalized treatment strategies and inform public health policies aimed at mitigating the effects of drug abuse.

Mathematical modeling and analysis of the co-dynamics of crime and drug abuse

This study explores the dynamics of crime and substance abuse within a population by developing a novel mathematical model that integrates social interactions, rehabilitation efforts, and relapse probabilities. The model introduces a critical metric, the control reproduction number \\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$(\\mathscr{R}_j)$$\\end{document}, to quantify the invasion threshold for these behaviors. The findings reveal that the crime/substance-free equilibrium is globally asymptotically stable when \\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$\\mathscr {R}_j\\le 1$$\\end{document}. At the same time, entrenched equilibria become stable where \\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$\\mathscr {R}_j >1$$\\end{document}. Additionally, the model predicts the potential for a co-existent equilibrium where crime/substance abuse and a free state can coexist if all reproduction numbers exceed unity. Sensitivity analysis identifies key factors influencing \\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$\\mathscr {R}_j$$\\end{document}, including behavioral transmission, internal progression rates, intervention efficacy, and recovery/relapse probabilities. Numerical simulations validate theoretical predictions regarding the stability of different equilibria, highlighting the critical importance of interventions targeting transmission reduction and rehabilitation efficiency. The research underscores the significance of understanding invasion dynamics for the coexistence of behaviors. It demonstrates the utility of mathematical modeling in elucidating the spread of social phenomena and informing effective control strategies.

A Review of Drug Abuse, Misuse, and Related Laboratory Challenges.

Various definitions can be considered for drugs and substance abuse. According to the National Institute on Abuse, the use of an over-the-counter drug in a different way than that prescribed to experience or arouse emotion is a simple form of drug abuse. The World Health Organization (WHO) also defines drug abuse as the persistent or sporadic use of drugs that are incompatible or unrelated to acceptable medical practice. With the increasing non-therapeutic use of prescription drugs, serious related consequences have also increased. Therefore, there is a need to know more precisely about the types of substances and drug abuse, which is the most important part of diagnosis and recognizing the tests that cause false positive and negative results. The purpose of this review article is to collect and summarize the most important and more common types of drugs of abuse and review the drugs that cause false results in screening tests. In addition, the most common detection methods of the drug will be reviewed and the advantages and drawbacks of each method will be discussed. In this article, we aimed to point out all the facts about the emerging problems in drug abuse, the methods of screening, and the possible false results in addition to troubleshooting strategies.

Alleviating salinity stress in Cyamopsis tetragonoloba L. seedlings through foliar application of silicon or melatonin in arid and semi-desert environments

Salinity stress can be deemed as an important challenge extremely affecting crop growth as well as development. Therefore, it is important to improve its tolerance to salinity stress, in arid as well as semiarid regions. Thus, this experiment explored the influence of foliar usage of plant growth-stimulating substances with different concentrations (C: control, melatonin (M1: 100, M2: 200 and M3:400 µM) and silicon (Si1: 5.4, Si2: 10.8 and Si3: 16.2 mM)) on some physiological as well as biochemical attributes of Cyamopsis tetragonoloba L. (guar) seedlings under five salinity levels (S1: no-salt treatment, S2: 5, S3: 10, S4: 15 and S5: 20 dS m−1). With increasing salinity, shoot dry weight, Fv/Fm, F′v/F′m, ΦPSII, qp, qL, Rfd, ETR, photosynthetic pigments, membrane stability index, as well as relative water content were gradually reduced in salt-stressed guar, as comparison is made to the non-saline conditions. However, foliar usage of plant growth-stimulating substances was effective in improving guar tolerance to salinity by elevating the DPPH radical scavenging capacity and anthocyanin, thus enhancing membrane stability index, improving the electron's transport rate, reducing electrolyte leakage and decreasing the damage affecting the reaction center of PSII, as comparison is made with control. Such positive effects were exhibited in elevating growth under salinity stress. Si3 treatment demonstrated the best response under salinity stress, as compared with the other treatments. Consequently, foliar usage of silicon or melatonin in salt-stressed guar seedlings can serve an efficient method to improve salt tolerance under salinity stress in arid and semiarid regions.

The hierarchical taxonomy of psychopathology and the search for neurobiological substrates of mental illness: A systematic review and roadmap for future research.

Understanding the neurobiological mechanisms involved in psychopathology has been hindered by the limitations of categorical nosologies. The Hierarchical Taxonomy of Psychopathology (HiTOP) is an alternative dimensional system for characterizing psychopathology, derived from quantitative studies of covariation among diagnoses and symptoms. HiTOP provides more promising targets for clinical neuroscience than traditional psychiatric diagnoses and can facilitate cumulative integration of existing research. We systematically reviewed 164 human neuroimaging studies with sample sizes of 194 or greater that have investigated dimensions of psychopathology classified within HiTOP. Replicated results were identified for constructs at five different levels of the hierarchy, including the overarching p-factor, the externalizing superspectrum, the thought disorder and internalizing spectra, the distress subfactor, and the depression symptom dimension. Our review highlights the potential of dimensional clinical neuroscience research and the usefulness of HiTOP while also suggesting limitations of existing work in this relatively young field. We discuss how HiTOP can be integrated synergistically with neuroscience-oriented, transdiagnostic frameworks developed by the National Institutes of Health, including the Research Domain Criteria, Addictions Neuroclinical Assessment, and the National Institute on Drug Abuse's Phenotyping Assessment Battery, and how researchers can use HiTOP to accelerate clinical neuroscience research in humans and other species. (PsycInfo Database Record (c) 2024 APA, all rights reserved).