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Psychoactive Substances (psychoactive + substance)

Distribution by Scientific Domains

Medical Sciences	35%
Life Sciences	14%
Humanities and Social Sciences	14%

Terms modified by Psychoactive Substances

psychoactive substance use

Selected Abstracts

Toxicology and Circumstances of Death of Homicide Victims in New South Wales, Australia 1996,2005

JOURNAL OF FORENSIC SCIENCES, Issue 2 2008
Shane Darke Ph.D.
Abstract:, To determine the prevalence and circumstances of psychoactive substances amongst homicide victims, 485 consecutive cases autopsied at the NSW Department of Forensic Medicine (1/1/1996,12/31/2005) were analyzed. Substances were detected in 62.6% of cases, and illicit drugs in 32.8%. Alcohol, cannabis, opioids, and psychostimulants were most commonly detected. Alcohol and cannabis were both more prevalent amongst males. Mean ages were significantly younger for decedents who tested positive for a substance and for an illicit drug. Cases where death resulted from a physical altercation were more likely to have had alcohol and cannabis present. Illicit drugs were prominent amongst firearms deaths. The proportion of alcohol positive cases increased from 25.0% on Monday to 49.4% for Saturdays/Sundays. Alcohol was more common in incidents in the 0001,0600 h and 1800,2400 h periods. Psychoactive substances appear to substantially increase the risk of homicide, although there are important differences between drug classes in the circumstances of such incidents. [source]

Prognostic impact of psychoactive substances use during hospitalization for intentional drug overdose

ACTA PSYCHIATRICA SCANDINAVICA, Issue 2 2005
M. Tournier
Objective:, To assess whether current use of psychoactive substance(s) is a prognostic factor during hospitalization for intentional drug overdose (IDO). Method:, Current intoxication with psychoactive substance(s) [cannabis, opiate, buprenorphine, amphetamine/ecstasy, cocaine, lysergic acid diethylamide (LSD)] was identified using toxicological urinalysis in 671 patients with IDO. An IDO was a priori defined as serious if associated with one of the following events: death, hospitalization in intensive care unit longer than 48 h, respiratory support, use of vasopressive drugs, cardiac massage or dialysis. Results:, Subjects positive for toxicological assays were twice as likely to present with serious IDO (OR = 1.9, 95% CI: 1.3,2.8, P = 0.001), independently from a large range of confounding factors. The risk of serious IDO was especially marked in subjects using LSD, buprenorphine or opiates. Conclusion:, Systematic investigation of substance use could be important to adapt medical management of subjects with IDO in general hospital, but also in primary care and psychiatric settings. [source]

Substance use and the prediction of young offender recidivism

DRUG AND ALCOHOL REVIEW, Issue 4 2003
ALDIS L. PUTNI
Abstract The problem considered is whether self-reported substance use can be used in the estimation of recidivism risk among youths placed in secure care. The Secure Care Psychosocial Screening (SECAPS) and offending records of 447 youths admitted to detention centres in South Australia were examined. The target outcome was any new offending within 6 months of release. Use of a psychoactive substance at the time of committing the most recent offence was not a significant predictor of subsequent offending, nor was acknowledging having a problem with drug or alcohol use. In relation to the recent use of alcohol, marijuana, hallucinogens, sedatives/hypnotics, narcotics, stimulants and inhalants, only the use of alcohol and inhalants appeared to have significant relationships with recidivism. While the relationships were too small to permit using these items on their own to estimate re-offending risk, recent alcohol and inhalant use could be included as part of a broader recidivism risk assessment. [source]

Are there genetic influences on addiction: evidence from family, adoption and twin studies

ADDICTION, Issue 7 2008
Arpana Agrawal
ABSTRACT Aims In this exciting era of gene discovery, we review evidence from family, adoption and twin studies that examine the genetic basis for addiction. With a focus on the classical twin design that utilizes data on monozygotic and dizygotic twins, we discuss support in favor of heritable influences on alcohol, nicotine, cannabis and other illicit drug dependence. Methods We review whether these genetic factors also influence earlier stages (e.g. experimentation) of the addictive process and whether there are genetic influences specific to each psychoactive substance. Results Converging evidence from these studies supports the role of moderate to high genetic influences on addiction with estimates ranging from 0.30 to 0.70. The changing role of these heritable factors as a function of gender, age and cultural characteristics is also discussed. We highlight the importance of the interplay between genes and the environment as it relates to risk for addiction and the utility of the children-of-twins design for emerging studies of gene,environment interaction is presented. Conclusions Despite the advances being made by low-cost high-throughput whole genome association assays, we posit that information garnered from twin studies, especially extended twin designs with power to examine gene,environment interactions, will continue to form the foundation for genomic research. [source]

Caffeine does not attenuate experimentally induced ischemic pain in healthy subjects

ACTA ANAESTHESIOLOGICA SCANDINAVICA, Issue 10 2009
J. DELLERMALM
Background and aims: Caffeine is likely the most widely used psychoactive substance in the world. It is also an analgesic adjuvant and has individual analgesic properties. The latter effect has been attributed to adenosine receptor antagonism, but the site of action is unknown. The aim of this study was to investigate the analgesic properties of caffeine on experimentally induced ischemic pain and to attempt to elucidate whether the site of action is central or peripheral. Materials and methods: Seventeen healthy subjects received intravenous (i.v.) regional and systemic infusions of caffeine at 10 mg/kg or placebo in a double-blind, crossover fashion to investigate the site of action for caffeine-induced analgesia. Subjects underwent a sub-maximum effort tourniquet test. Pain scores [visual analogue scale (VAS), 0,100] were assessed every minute up to a maximum of 45 min. Results: The sum of pain scores (SPS, accumulation of VAS scores) was attenuated neither by systemic 2405 (±234) nor by i.v. regional caffeine 2427 (±190) as compared with placebo 2442 (±205), P=0.99 (mean±SEM). Time to maximal VAS score did not differ significantly between treatments, P=0.94. There was no correlation between caffeine concentration in plasma and time to maximal pain score, or between SPS and plasma concentration. Conclusion: Caffeine does not have an analgesic effect on ischemic pain, either by a peripheral or by a central site of action. [source]

Disproportionately High Rate of Epileptic Seizure in Patients Abusing Dextropropoxyphene

THE AMERICAN JOURNAL ON ADDICTIONS, Issue 5 2009
Debasish Basu MD
Dextropropoxyphene (DPP), a weak opioid, is often abused as a psychoactive substance. In this retrospective chart review to document, characterize and put in perspective the often-obtained history of epileptic seizures in patients with DPP abuse, we analyzed the case files of all patients with DPP abuse registered in our center (a tertiary-care drug de-addiction clinic in north India) from May 1, 2001 until April 30, 2007 and those with use of other opioids during the same period. Non-drug-related seizures were excluded from analysis. Out of 312 patients with DPP abuse, 63 (20.2%) had epileptic seizures related to DPP use, in contrast to 0.4% ,4.2% of other opioid users. The seizures were mostly characterized as generalized tonic-clonic seizures (87.3%), occurring around two hours following a higher-than-usual dose of DPP. Those with seizures had significantly greater duration of DPP use and higher rates of medical comorbidity compared to patients without seizure. Age, duration of use and medical comorbidity were better predictors of seizure than dosage of drug or use of multiple drugs. Thus, DPP-induced epileptic seizures are common (one in five), and much more frequent than seizures in patients using other opioids. The awareness of this phenomenon has implications for diagnosis and management, as well as for drug regulation policy. [source]

Prognostic impact of psychoactive substances use during hospitalization for intentional drug overdose

From scrubland to vintage wine: Australia's response to substance-related problems in the last 40 years,

DRUG AND ALCOHOL REVIEW, Issue 3 2003
FAChAM (Hon), FAFPHM, FRACP, FRCPC, Professor JAMES G. RANKIN MB
Abstract Over the last 40 years Australia's response to substance-related problems compared with most western nations has been outstandingly good. Since the 1960s concerns about problems of substance use have expanded from a focus on alcohol to include tobacco and a wide range of other licit as well as illicit psychoactive substances. During this period there have been major advances in our knowledge and understanding of substance-related problems and effective methods of prevention, intervention and treatment. In parallel has been the development of a large number of non-government, government and professional organizations concerned with problems of substance use. These groups, individually and collectively, have contributed to the development of policies, plans, resources and programmes to prevent and minimize substance-related harm. Although significant progress in these endeavours took place between 1960 and 1986, there has been accelerated growth since and largely as a result of the establishment of the National Campaign Against Drug Abuse in 1986 and the ensuing National Drug Strategy and the Illicit Drug Strategy. However, much of this more recent success was possible because of the existence of the organizations, networks and infrastructures established in the earlier period and the Nation's general health, social and educational programmes. These initiatives have been associated with reductions in alcohol and tobacco use and related problems and evidence of reductions in some problem areas associated with illicit drug use. Despite these gains, there have been areas of failure and missed opportunities. Finally, it is critical to ensure that past achievements and opportunities for continued successful initiatives are not undermined by identifiable impediments and risks that could imperil the philosophy, goals, infrastructure and programmes that form the basis for Australia's success to date. [source]

Functional screening of traditional antidepressants with primary cortical neuronal networks grown on multielectrode neurochips

EUROPEAN JOURNAL OF NEUROSCIENCE, Issue 2 2006
Alexandra Gramowski
Abstract We optimized the novel technique of multielectrode neurochip recordings for the rapid and efficient screening of neuroactivity. Changes in the spontaneous activity of cultured networks of primary cortical neurons were quantified to evaluate the action of drugs on the firing dynamics of complex network activity. The multiparametric assessment of electrical activity changes caused by psychoactive herbal extracts from Hypericum, Passiflora and Valeriana, and various combinations thereof revealed a receptor-specific and concentration-dependent inhibition of the firing patterns. The spike and burst rates showed significant substance-dependent effects and significant differences in potency. The effects of specific receptor blockades on the inhibitory responses provided evidence that the herbal extracts act on gamma-amino butyric acid (GABA) and serotonin (5-HT) receptors, which are recognized targets of pharmacological antidepressant treatment. A biphasic effect, serotonergic stimulation of activity at low concentrations that is overridden by GABAergic inhibition at higher concentrations, is apparent with Hypericum alone and the triple combination of the extracts. The more potent neuroactivity of the triple combination compared to Hypericum alone and the additive effect of Passiflora and Valeriana suggest a synergy between constituent herbal extracts. The extracts and their combinations affected the set of derived activity parameters in a concomitant manner suggesting that all three constituent extracts and their combinations have largely similar modes of action. This study also demonstrates the sensitivity, selectivity and robustness of neurochip recordings for high content screening of complex mixtures of neuroactive substances and for providing multiparametric information on neuronal activity changes to assess the therapeutic potential of psychoactive substances. [source]

Toxicology and Circumstances of Completed Suicide by Means Other than Overdose,

JOURNAL OF FORENSIC SCIENCES, Issue 2 2009
Shane Darke Ph.D.
Abstract:, To determine the prevalence and circumstances of psychoactive substances amongst nonoverdose completed suicide, 1436 consecutive cases autopsied at the NSW Department of Forensic Medicine over the period 1/1/1997,12/31/2006 were analyzed. Substances were detected in 67.2% of cases, and illicit drugs in 20.1%. Alcohol was present in 40.6% of cases. Males were more likely to be positive for alcohol, cannabis, and psychostimulants, and females for pharmaceuticals. Illicits were associated with younger age. Alcohol was most prominent amongst toxicity cases, as were opioids, psychostimulants amongst gunshot cases, and pharmaceuticals amongst drownings. Cases in which drug and alcohol histories were noted were more likely to have a substance detected. Alcohol was more common where a suicide note was left and where relationship problems were involved. Pharmaceuticals were more common where a previous attempt was noted. Licit and illicit substances are strongly associated with suicide, even when the method does not involve drug overdose. [source]

Toxicology and Circumstances of Death of Homicide Victims in New South Wales, Australia 1996,2005

Morphine activates Arc expression in the mouse striatum and in mouse neuroblastoma Neuro2A MOR1A cells expressing ,-opioid receptors

JOURNAL OF NEUROSCIENCE RESEARCH, Issue 4 2005
Barbara Zió, kowska
Abstract Activity-regulated cytoskeleton-associated protein (Arc) is an effector immediate early gene product implicated in long-term potentiation and other forms of neuroplasticity. Earlier studies demonstrated Arc induction in discrete brain regions by several psychoactive substances, including drugs of abuse. In the present experiments, the influence of morphine on Arc expression was assessed by quantitative reverse transcription real-time PCR and Western blotting in vivo in the mouse striatum/nucleus accumbens and, in vitro, in the mouse Neuro2A MOR1A cell line, expressing ,-opioid receptor. An acute administration of morphine produced a marked increase in Arc mRNA and protein level in the mouse striatum/nucleus accumbens complex. After prolonged opiate treatment, tolerance to the stimulatory effect of morphine on Arc expression developed. No changes in the striatal Arc mRNA levels were observed during spontaneous or opioid antagonist-precipitated morphine withdrawal. In Neuro2A MOR1A cells, acute, but not prolonged, morphine treatment elevated Arc mRNA level by activation of ,-opioid receptor. This was accompanied by a corresponding increase in Arc protein level. Inhibition experiments revealed that morphine induced Arc expression in Neuro2A MOR1A cells via intracellular signaling pathways involving mitogen-activated protein (MAP) kinases and protein kinase C. These results lend further support to the notion that stimulation of opioid receptors may exert an activating influence on some intracellular pathways and leads to induction of immediate early genes. They also demonstrate that Arc is induced in the brain in vivo after morphine administration and thus may play a role in neuroadaptations produced by the drug. © 2005 Wiley-Liss, Inc. [source]

Legal issues in school health services and school psychology: Guidelines for the administration of medication

PSYCHOLOGY IN THE SCHOOLS, Issue 9 2009
Anna Mazur-Mosiewicz
The use of psychoactive medications to augment behavioral and psychosocial interventions in schools has significantly increased within the last few decades. Yet, advising, administrating, and supervising the dispensation of medication (including psychostimulants and psychoactive substances) tend to be some of the most risky tasks of school administrators and personnel. Medication administration is not only an increasing source of civil and administrative liability for school districts, but may lead to legal questions for school counselors, psychologists, and social workers. In response to growing concerns, this article provides guidelines necessary for safe medication administration and monitoring in the school setting. Federal, state, and district guidelines are reviewed. Possible implications for school and district policy makers, principals, teachers, school nurses, school psychologists, social workers, counselors, and parents are outlined. © 2009 Wiley Periodicals, Inc. [source]

SPECIAL SECTION: The Future of a Discipline: Considering the Ontological/Methodological Future of the Anthropology of Consciousness, Part II,

ANTHROPOLOGY OF CONSCIOUSNESS, Issue 2 2010
Towards an Ethnometaphysics of Consciousness: Suggested Adjustments in SAC's Quest to Reroute the Main(Stream)
ABSTRACT In order for the valuable research published in the Anthropology of Consciousness (AoC) journal to have the impact it ought to have upon the anthropological mainstream, contributors must demonstrate that they appreciate the historical tradition of anthropology as an intellectual forebear. Although "ethnometaphysics" has been cited sporadically by anthropologists over the past half-century, it never really caught on as an interdisciplinary speciality like ethnobotany, ethnomusicology, and ethnomathematics. Pointing to the example of discord in the West between viewing psychoactive substances as either "hallucinogens" or "entheogens," I reassert ethnometaphysics in an aim to revamp the overlooked coining of this sub-field by anthropologist A. Irving Hallowell. Such a position rebrands SAC's alternative outlook in a way that could be seen by mainstream colleagues as less radical, thus giving the Society a more realistic opportunity to provoke progressive changes in the mainstream of our discipline. [source]