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Two papers have appeared in the literature recently reporting the use of the Severity of Opiate Dependence Questionnaire (SODQ) with American and British samples of opiate addicts. This paper presents the findings of a third study. The SODQ was completed by a further 126 subjects attending the original New York Clinic and the results largely confirmed our earlier findings: first the four main sections of the SODQ each give a strong first factor and secondly when these are combined a strong overall factor emerges. These results are again at variance with those found in the British sample and possible reasons briefly discussed. [ABSTRACT FROM AUTHOR]

Focuses on a study which examined the changes in methadone withdrawal doses of opiate addicts. Drug use of participants prior to hospital admission; Decline in the initial methadone dose; Increase in high dose prescription.

This study investigates severity of dependence upon heroin, cocaine and amphetamines in a group of 200 heroin users, 75% of whom were not in contact with any treatment agency. For drug takers who were current users of more than one drug, heroin produced more severe dependence than either cocaine or amphetamine and many users of these stimulant drugs reported having experienced no problems of dependence. Severity of dependence was influenced by route of administration as well as type of drug. Heroin taken by injection was associated with more severe dependence than smoked heroin. For cocaine, injection and smoking were associated with equivalent dependence ratings, and both of these routes were associated with more severe dependence than cocaine used intranasally. For amphetamine, there were no differences in severity of dependence ratings for injection, intranasal or oral use. Severity of dependence was correlated with dose and duration of drug use; it was also associated with previous attendance at a drug treatment agency, though dependence problems were also common among heroin users who had never received treatment. Implications of these findings are discussed.

Route of administration of various drugs is an area of study to which specific attention must be paid in study of different HIV risks of drug use by various routes. If changes in route are seen in individuals or within populations, then study of these transitions in route may identify new approaches which could be developed in HIV prevention. The consideration in this paper is based around ten questions: (i) What is a transition? (ii) Do routes of administration vary by time and place? (iii) Is choice of route influenced by availability of drug paraphernalia? (iv) How does the context influence initial choice of administration, and possible subsequent transitions? (v) Are lapse and relapse meaningful concepts? (vi) Transitions: how much of it is going on? (vii) How much does change of route (with the same drug) signify a change of drug effect, its significance, or its relationship with other risk behaviour? (viii) Is change of route of use of one drug always accompanied by the same change of route of other drugs? (ix) Injectors/non-injectors and sharers/non-sharers: do these behavioural characteristics exist as categories or are they distributed along a continuum? (x) Are transitions reversible? This paper is accompanied by two research reports which describe explorations into the extent and nature of transitions amongst heroin users.

Preliminary data are presented here from a study of drug transitions in the UK. These support the contention that differences in route of administration are likely to be reflected in differing patterns of drug use, and associated with differing health risks for the individual drug user. Heroin 'chasers' were found to have robust and long-term patterns of heroin use and could not merely be considered as pre-injectors. They were also younger. No differences were found in the typical daily doses prior to entering treatment between chasers and injectors. Subjects who usually 'chased the dragon' but who would also inject were less likely to have shared injecting equipment in the past. Transitions between different routes of use were found in most directions. However, changes from 'chasing' to injection were most common. Year of initiation into heroin use was also related to initial route of use.

The use of methadone in the treatment of drug dependence has provoked a good deal of controversy. However, it is clear that there is considerable variation between methadone treatment programmes and relatively little detail is available about the organization and operation of these programmes. This World Health Organization survey examines the content and structure of methadone treatment programmes, and particularly methadone maintenance programmes, in six countries. The six countries were Australia, Canada, France, the Netherlands, Thailand and the UK. The report presents information about the extent of national problems and about such issues as type of dispensing practices, dose- and time-limits for prescribing methadone, programme entry criteria, staffing, integration with other services, and urine testing. Developments and trends during the decade 1980-1990 are discussed and implications for further research and programme development are presented.

This study compares the responses of opiate addicts at a London drug treatment centre to two outpatient methadone-based detoxification programmes. These involved either a fixed (non-negotiable) dose reduction schedule or a flexible, negotiable withdrawal schedule. In the negotiable condition, subjects were less likely to complete the detoxification programme and the mean reduction in dose achieved by the subjects in the negotiable condition was less than that in the fixed group. There was no difference between groups in programme retention at 6 weeks though subjects who remained in treatment in the negotiable group tended to extend their detoxification period beyond this point. The overall response of subjects in both groups was unsatisfactory. Only 13% of the subjects initially allocated to detoxification or 28% of those who actually started detoxification completed treatment; urine screening showed that heroin abuse was a continuing problem during treatment. The implications of these results for detoxification and drug treatment services are discussed.

The roles of the prescribing of maintenance methadone and prescribing injectable drugs in the management of opiate addicts have become subjects of active debate since the advent of HIV. Data are presented on the social circumstances and drug-taking behaviour of 26 opiate addicts who had been receiving maintenance methadone (24 of whom had been receiving at least part of the prescription as injectible methadone ampoules.

There has been great concern in recent years about the abuse of cocaine, particularly in its smokable form 'crack'. This paper presents data drawn from 441 patients seen by a South London Community Drug Team between 1987 and 1989. Only four (1%) cited cocaine abuse as the main drug problem. Heroin was the most common main drug. Detailed information was available on 355 of these subjects. During the study period 63 patients reported using cocaine and the proportion of subjects using cocaine increased from 13% to 29%. Within the sub-group of cocaine users, there was a marked increase in the use of smokable forms of cocaine from 15% in 1987 to 75% in 1989. In view of the increased dependence risk associated with smoking cocaine, this is seen as an ominous development.