Self-reported cannabis use in Great Britain in 1981

Multiple self-damaging behaviour among alcoholic women. A prevalence study

Among patients being treated for specific behaviour-control problems, there exists an important subgroup of 'multi-impulsive' patients whose treatment might be facilitated if the full range of their problems were recognised and dealt with as one general issue of impulse control. In women in particular, loss of control of eating may be prevalent and easily concealed from staff, and may thwart treatment. This survey of 50 women attending an alcoholic-treatment unit explored the prevalence of behavioural-control problems other than those of alcohol. Three-quarters of the women also had other behavioural problems. Over half the sample had thought of taking an overdose and just under half had actually taken one; about a quarter had cut themselves deliberately; half described impulsive physical violence; half acknowledged a period of 'promiscuity'; and at least 16% had had a clinically diagnosable eating disorder. More research is needed but we believe that all self-damaging behaviour should be addressed simultaneously to prevent 'revolving door' relapses as emotional distress is transferred from one behaviour to another.

Cannabis and psychotic illness

In-patients with psychotic symptoms and cannabis-positive urine analysis were assessed by PSE within one week of admission and again at one and six months. Concurrently admitted psychotic patients with drug-free urine analysis were controls. At one week the two groups differed significantly on only five PSE items: changed perception, thought insertion, non-verbal auditory hallucinations, delusions of control, and delusions of grandiose ability. One item (delayed sleep) differed at one month, and none at six months. The symptom cluster at one week is consistent with acute cannabis intoxication. Subjects and controls were mostly single, poorly educated, unemployed people with histories of psychotic disorders, and given major tranquillisers on admission. Compared with controls, subjects were younger, less likely to have psychiatric histories, more often male, Afro-Caribbeans with a history of convictions and compulsory admissions. The commonest diagnosis was schizophrenia. Use of the label 'cannabis-induced psychosis' may obscure a diagnosis of paranoid schizophrenia. A short-lived psychotic episode does occur in clear consciousness after cannabis intoxication, but chronic cannabis-induced psychosis was not found.

Cannabis use in a large sample of acute psychiatric admissions

A sample of 908 patients drawn from two London Psychiatric Hospitals is described in terms of age, sex, self-reported drug and alcohol history, drug urinalysis results and initial psychiatric diagnosis. Some (34.5%) of respondents admitted to using cannabis at least once in their lifetime and 13% of those tested had urines positive for cannabis on admission. Cannabis use is commoner in young males. These is a higher likelihood that an initial diagnosis of 'psychosis' will be made at admission if patients either report use of cannabis or present a urine sample positive for cannabis.

Drug and solvent misuse and knowledge of HIV infections in 14-16-year-old comprehensive school students

This study of drug and solvent misuse and knowledge of the HIV link amongst 934 secondary school students, completes a third survey concerned with prevalence of drug misuse. Drug and/or solvent misuse was found in 16% of the sample including 5% who use hard drugs, which since 1985 represents a 3% decline, but a 1% increase in the use of hallucinogens. The misusers were compared with the non-users with regard to their social characteristics, other illegal behaviour and their knowledge of HIV and other public health concerns. There were some surprises concerning the gender results. Misusers were found to be more socially disadvantaged and more involved in other negative behaviour. Despite reasonable knowledge about HIV-related matters, the misuser group were less accurate on all public health issues, appearing to 'deny' the potential risks associated with drug misuse.

Economic aspects of illicit drug markets and drug enforcement policies

This paper reviews the economics literature on illicit drug markets and drug enforcement policies. The first part of the paper examines the problems involved in establishing the parameters of the illicit market. The second part of the paper examines the contribution economics can make to the evaluation of drug enforcement policies: the discussion covers the determination of both the appropriate level of enforcement expenditure and the appropriate mix of policy measures.