PubMed Health⌕ Search

Biomedical subjects

A R Winstock

Publications and source records attributed to A R Winstock.

7 recordsLinked to original sources
PubMed2006

Vasopressin and oxytocin secretion in response to the consumption of ecstasy in a clubbing population.

Despite the common use of MDMA (ecstasy) in the UK, the mechanism underlying associated potentially fatal cerebral oedema is unclear. We used a new experimental approach working directly with clubbers to perform a study on 30 (17 male) experienced clubbers (mean 6.6 years of clubbing). Pre- and post-clubbing measurements were performed to compare plasma levels of pituitary hormones (vasopressin, oxytocin), plasma and urine osmolality, urinary pH, and plasma sodium and urea. Ecstasy consumption was confirmed by using urinary drug screening pre- and post-clubbing. MDMA was detected in the urine samples of 17 subjects, three of which tested positive during pre-clubbing tests. Mean plasma vasopressin concentration increased in the MDMA group (1.28 +/- 0.29 to 1.43 +/- 0.41 pmol/l), but fell in other participants (1.23 +/- 0.42 to 1.16 +/- 0.0.34 pmol/l). Similarly, mean plasma oxytocin concentrations increased after ingestion of MDMA (2.02 +/- 0.29 to 2.43 +/- 0.24 pmol/l), but fell in the group that did not use MDMA (2.17 +/- 0.36 pmol/l to 1.89 +/- 0.37 pmol/l). There was a significant group by time interaction for plasma osmolality and plasma sodium (p = 0.001 and p = 0.003, respectively) and between change in urinary osmolality (p < 0.001) and MDMA use, with the pattern of change being consistent with the induction of inappropriate vasopressin secretion (also known as SIADH) by MDMA. This report demonstrates SIADH in ecstasy-using "clubbers", which has important clinical implications.

Adolescent↗
PubMed2001

Drugs and the dance music scene: a survey of current drug use patterns among a sample of dance music enthusiasts in the UK.

This study explores the utility of a self-completion survey method to quickly and cheaply generate information on patterns and trends among regular "recreational" drug consumers. Data is reported here from 1151 subjects accessed through a dance music publication. In keeping with previous studies of drug use within the dance scene polysubstance use was the norm. Many of those reporting use of "ecstasy" were regularly using multiple tablets often consumed in combination with other substances thus exposing themselves to serious health risks, in particular the risk of dose related neurotoxic effects. Seventy percent were drinking alcohol at hazardous levels. Subjects' patterns of drug purchasing also put them at risk of severe criminal sanction. Data supported evidence that cocaine use had become increasing popular in the UK, but contrasted with some commentators' views that ecstasy use was in decline. The utility of this method and how the results should be interpreted is discussed, as are the data's implications for harm and risk reduction activities.

Adult↗
PubMed2001

Ecstasy pill testing: harm minimization gone too far?

Harm reduction has become the focus of public health initiatives and therapeutic intervention in the management of dependent drug use over the last 20 years. The last decade has seen such approaches being extended to recreational drug use. Most harm reduction initiatives have aimed to inform users about risks and ways of minimizing risk. The concept of providing illicit drug users with quality assessment of their chosen drug is one possible harm reduction intervention that until recently has received little attention. In response to well-publicized 'ecstasy'-related deaths organizations in some European countries and the United States have chosen to provide a 'pill testing service' for users. There are two broad categories of pill testing offered. Simple colour reagent test kits (Marquis Reagent and colour charts) form the most widely used on-site pill testing method. Less frequently, but more accurately, laboratory personnel with access to sophisticated chromatographic equipment (high performance liquid chromatography (HPLC) or gas chromatography-mass spectrometry (GC-MS)) may provide analysis of a pill. Pill testing kits have been advocated as a 'tool to protect yourself against the polluted XTC market'. We refute this line of reasoning. Of the different tests only techniques such as GC-MS can identify satisfactorily the psychoactive constituents present in ecstasy pills. Colour tests based on an interpretation of a colour response in the presence of a drug are, at best, subjective. Pill testing of any description does not guarantee safety, or protect the consumer against individual responses to pills. At best it gives an artificial 'shine of safety' to a group of diverse drugs that remain both illicit and potentially harmful. Other simpler harm reduction mechanisms are likely to be more effective.

Chromatography, Gas↗
PubMed2000

National survey of hepatitis testing and vaccination services provided by drug services in England and Wales.

Since viral hepatitis among intravenous drug users continues to be a major cause of morbidity and mortality, the present study was conducted to survey drug agencies in England and Wales in order to identify the prevalence of hepatitis B and C testing and vaccination being provided. A postal survey of all 539 drug agencies in England and Wales was thus conducted to assess their current treatment provisions and practices. An analysis of the responses provided by the 373 agencies that returned usable data (69.2% response rate) revealed that only one-quarter (26.6%) of the drug agencies conducted routine hepatitis B testing, and 26.9% did not offer it at all. Just over half (55.7%) of the agencies provided hepatitis B vaccination, but only 21.7% did so routinely. Seventy percent provided hepatitis C testing, but only 24% did so routinely. Nevertheless, the majority of respondents, of whom 40.3% were nurses and 25.1% drug workers, believed that clients and their partners should be offered hepatitis B and C screening. The paucity of hepatitis testing and vaccination services being offered to injecting drug users is unacceptable, with users, their partners and children being needlessly exposed to continued risk. The disparity between recommended policy and current practice needs to be urgently addressed.

Delivery of Health Care↗
PubMed1995

Medical complications of pregnancy in hereditary haemorrhagic telangiectasia.

Hereditary haemorrhagic telangiectasia (HHT) displays significant variation in severity between affected individuals in the same family, ranging from relatively trivial epistaxis and telangiectasia to gastrointestinal, cerebral and pulmonary involvement. Evidence for successful therapy of HHT-related haemorrhage with oestrogens and progesterones, and recent case reports outlining pulmonary complications of pregnancy in HHT, prompted us to review the outcome of 161 pregnancies in 47 affected women. HHT-related maternal complications developed in eleven patients, ten in the subgroup of 23 pregnancies in which pulmonary arteriovenous malformations (PAVMs) were present at the outset, or documented in the two years following pregnancy. We present six cases of intrapulmonary shunt deterioration, two cases of fatal pulmonary haemorrhage and three cerebrovascular accidents related to pregnancy. A predisposition towards PAVMs in females was observed. Following the recent discovery of mutations in the endoglin gene in this disease, our data support a hypothesis of hormonal modification of the HHT phenotype. In addition, a significant excess of affected offspring are present in HHT families. We consider contributary aetiological factors, and discuss implications for patient management.

Abortion, Spontaneous↗