[Liquid ecstasy poisoning: study of 22 cases]

Club drug use and dependence among young adults recruited through time-space sampling

OBJECTIVES

Ketamine, methylenedioxymethamphetamine (MDMA/ecstasy), cocaine, gamma-hydroxybutyrate (GHB), methamphetamine, and d-lysergic acid diethylamide (LSD/acid) have been identified as "club drugs" because of their link to club culture among young adults. Yet little is known about users' demographic differences in the prevalence of club drugs. This study sought to provide a comprehensive profile of users' demographic differences in prevalence of club drug use and dependence.

METHODS

Using time-space sampling, a stratified sample of 400 18- to 29-year-old club-going young adults was recruited into the Club Drugs and Health Project.

RESULTS

Though participants reported using an array of club drugs, almost all participants (90.0%) were cocaine users. Although there were several sexual orientation and gender differences in recent drug exposure, patterns of use (measured in days) were fairly similar across gender, sexual orientation, and age. Finally, a majority of individuals (58.5%) met or exceeded criteria for club drug dependence, with most (61.7%) indicating cocaine was the one drug causing them significant problems.

CONCLUSIONS

Cocaine is a major drug in club culture. It is essential to develop culturally appropriate drug education and prevention initiatives for young adults using club drugs.

Polydrug use among club-going young adults recruited through time-space sampling

The Club Drugs and Health Project was supported by a grant from the National Institute on Drug Abuse (R01-DA014925-02, Jeffrey T. Parsons, Principal Investigator). Christian Grov was supported as a postdoctoral fellow in the Behavioral Sciences training in drug abuse research program sponsored by Public Health Solutions and the National Development and Research Institutes, Inc. (NDRI) with funding from the National Institute on Drug Abuse (T32 DA07233). The authors recognize the contributions of the Club Drug and Health Project team-Michael Adams, Virginia Andersen, Anthony Bamonte, Jessica Colon, Armando Fuentes, Sarit A. Golub, Chris Hietikko, Eda Inan, Juline Koken, Jose E. Nanin, Anthony Surace, Julia Tomassilli, Jon Weiser, Brooke E. Wells, and the recruitment team. An earlier version of this paper was presented at the 2008 meeting of the College on Problems of Drug Dependence (CPDD). Though some researchers have indicated club drug users are more likely to be polydrug users, there remains little known about the prevalence and specific combinations of the substances they use. Between 2004 and 2006, and using time-space sampling, a stratified sample of 400, 18-29-year-old New York City club-going, drug-using young adults were recruited into the Club Drugs and Health Project. Most participants (91.7%) had engaged in polydrug usage and 1,670 combinations of drugs were reported. Ecstasy (86.6% of users) and cocaine (85.7% of users) were the two most-frequently reported club drugs used in combination with other substances. In terms of poly-club drug combinations, ecstasy appeared to be the "universal compliment" as this drug was most often cited in combinations with other club drugs (specifically ecstasy + ketamine, ecstasy + cocaine, ecstasy + gamma hydroxybutyrate or GHB). Other frequently cited drug combinations included cocaine and marijuana, ecstasy and marijuana, LSD and marijuana, and cocaine and alcohol. These data highlight the need to develop drug health-education and prevention messages targeted at polydrug usage.

[Poisoning by liquid ecstasy (GHB) in hospital emergency departments of Barcelona: a 2-years study]

BACKGROUND AND OBJECTIVE

Liquid ecstasy (GHB) is a new cause of drug overdose in our country. To describe the epidemiological profile and clinical manifestations, we analyzed cases of poisoning by GHB attended by the Emergency Departments (ED) of 2 hospitals of the city of Barcelona.

PATIENTS AND METHOD

During two years (2003-2004) all cases of poisoning or overdose due to GHB attended in the ED of the Hospital del Mar and the Hospital Clinic of Barcelona were collected. The diagnosis was clinical and/or by means of toxicological analysis. Epidemiological, clinical, laboratory and therapeutic variables as well as the evolution were collected.

RESULTS

A total of 339 patients (mean age 23.5 years, 62% male) were identified. Most patients (89%) were admitted during the early morning and during weekends (89%). Symptoms began in a public place in 97%. Reduced consciousness was the most important clinical manifestation, since 72% of patients had a Glasgow Coma Score of 12 or less. Seventy per cent stated having consumed GHB with other drugs, mainly ethyl alcohol (53%) and cocaine (16%). Some form of treatment was required in 32% of cases and 20 cases were administered an antidote: naloxone (12 cases), flumazenil (8 cases) and physostigmine (6 cases). Five patients needed orotracheal intubation and ventilatory support. One patient needed advanced vital support. There were no deaths.

CONCLUSIONS

GHB intoxication leading to reduced consciousness is a frequent motive for admission to the ED, mostly in young people and in the early morning during the weekend. GHB intoxication should be discarded in all cases of coma of unknown origin.

Relative abuse liability of gamma-hydroxybutyric acid, flunitrazepam, and ethanol in club drug users

OBJECTIVES

Despite the increasing concern about gamma-hydroxybutyric acid (GHB) toxicity, there are few studies examining the clinical pharmacology of GHB and its abuse potential. To evaluate GHB-induced subjective and physiological effects, its relative abuse liability and its impact on psychomotor performance in club drug users.

MATERIALS AND METHODS

Twelve healthy male recreational users of GHB participated in 5 experimental sessions in the framework of a clinical trial. The study was randomized, double-blind, double-dummy, and crossover. Drug conditions were a single oral dose of GHB (40 or 60 mg/kg), ethanol (0.7 g/kg), flunitrazepam (1.25 mg), and placebo. Study variables included vital signs (blood pressure, heart rate, oral temperature, pupil diameter), psychomotor performance (digit symbol substitution test, balance, Maddox-Wing), subjective effects (a set of 13 visual analogue scales, Addiction Research Center Inventory-49 items, and Evaluation of the Subjective Effects of Substances with Potential of Abuse questionnaires), and pharmacokinetics.

RESULTS

All active conditions induced positive effects related to their abuse potential. The administration of GHB produced euphoria and pleasurable effects with slightly higher ratings than those observed for flunitrazepam and ethanol. Gamma-hydroxybutyric acid induced a biphasic time profile with an initial stimulant-like effect related to the simultaneous rise of plasma concentrations and a latter sedative effect not related to GHB kinetics. Gamma-hydroxybutyric acid increased blood pressure and pupil diameter. Ethanol induced its prototypical effects, and flunitrazepam produced marked sedation. Gamma-hydroxybutyric acid and flunitrazepam impaired psychomotor performance, digit symbol substitution test, and balance task, whereas ethanol, at the dose tested, induced only mild effects exclusively affecting the balance task.

CONCLUSIONS

Our results suggest a high abuse liability of GHB and flunitrazepam in club drug users.

5-Year trends in use of hallucinogens and other adjunct drugs among UK dance drug users

AIMS

To describe and assess trends in the use of hallucinogens and other adjunct drugs over a 5-year period.

DESIGN

Repeated-measures cross-sectional survey.

SETTING AND PARTICIPANTS

Annual magazine-based survey targeting people who use drugs in dance contexts.

MEASUREMENTS

Lifetime use prevalence (ever used); age of first use; current use prevalence (any use within the last month), and extent of use within the last month (number of days used) for LSD, psilocybin, ketamine, GHB and nitrates.

FINDINGS

Prevalence increases for psilocybin, ketamine, GHB and nitrates use have been detected, with a sharp recent rise in current psilocybin use in 2002-2003 contrasting with more gradual and comprehensive evidence of increased ketamine use throughout the period 1999-2003. The declining prevalence of LSD use in general population surveys is replicated in this sentinel population study.

CONCLUSIONS

The rise in prevalence of hallucinogen and other adjunct drugs identified among dance drug users may be mirrored by wider prevalence increases among young people with a consequent need to study these trends carefully and to develop effective interventions, where required.

Club drugs: los viejos fármacos son las nuevas drogas de la fiesta

During the last few years the term club drugs has been used for defining an heterogeneous group of chemical substances in permanent evolution, that are consumed for recreational purposes. These substances have been extensively used, firstly by the Rave culture and later by the so called Club culture. These movements are characterized by the search of amplified sensations, by means of the combination of electronic music, marathon dancing and substance abuse. After years with a predominating consumption of designer amphetamines in these groups, it seems that the use of another type of substances is increasing, fundamentally drugs with hallucinogenic effects. This review focus in four of these substances; ketamine, dextromethorphan, nitrous oxide and gamma-hydroxybutyric acid (GHB, liquid ecstasy), and includes a discussion of their pharmacology, recreational use, adverse effects and patient management. These drugs are, at he same time, drugs of abuse and medicines with concrete indications in therapeutics, with an important increase of their consumption in the last few years. The Rave and Club cultures are also described.

Análisis de las consultas generadas por el consumo de éxtasis en un servicio de urgencias

BACKGROUND AND OBJECTIVE

There has been in recent years an increase in the number of medical emergencies due to the consumption of designer drugs. We decided to study the characteristics of medical emergencies generated by the consumption of amphetamine derivates.

PATIENTS AND METHOD

For the period 2000-2002, the medical records of patients attending the Emergency Department (ED) who claimed to have consumed ecstasy or other amphetamine derivates or whose toxicological tests were positive for amphetamines were reviewed.

RESULTS

A total of 230 cases were identified, of whom 135 attended the ED due directly to ecstasy consumption. The average age was 23 years and 68% were men. Most patients were attended on weekend nights. The main reasons for attendance at the ED were anxiety, agitation or cognitive disturbances, reduced consciousness and fits or motor disturbances. Eighty per cent of patients admitted having consumed ecstasy and 65% of patients had consumed additional drugs. Three severe cases were recorded: two died in the ED and another was admitted to the ICU.

CONCLUSIONS

Ecstasy consumption generates common attendance at the Emergency Department and can be potentially fatal.