Exploring the association between suicidal thoughts, self-injury, and GLP-1 receptor agonists in weight loss treatments: Insights from pharmacovigilance measures and unmasking analysis

INTRODUCTION

The study addresses concerns about potential psychiatric side effects of Glucagon-like peptide-1 receptor agonists (GLP-1 RA).

AIM

The aim of this work was to analyse adverse drug reports (ADRs) from the Food and Drug Administration Adverse Events Reporting System (FAERS) using metformin and orlistat as comparators.

METHODS

Descriptive and pharmacovigilance disproportionality analyses was performed.

RESULTS

A total of 209,354 ADRs were reported, including 59,300 serious cases. Of those, a total of 5378 psychiatric disorder cases, including 383 'serious' cases related to selected ADRs were registered during 2005-2023. After unmasking, 271 cases where individual GLP-1 RA were implicated showing liraglutide (n = 90; Reported Odds Ratio (ROR) = 1.64), exenatide (n = 67; ROR = 0.80), semaglutide (n = 61; ROR = 2.03), dulaglutide (n = 45; ROR = 0.84), tirzepatide (n = 5; ROR = 1.76) and albiglutide (n = 2; ROR = 0.04). A greater association between these ADRs with metformin was observed, but not orlistat. With regards to selected preferred terms (PTs), 42 deaths including 13 completed suicides were recorded. Suicidal ideation was recorded in n = 236 cases for 6/7 GLP-1 RA (excluding lixisenatide).

DISCUSSION

Suicide/self-injury reports pertaining to semaglutide; tirzepatide; and liraglutide were characterised, although lower than metformin. It is postulated that rapid weight loss achieved with GLP-1 RA can trigger significant emotional, biological, and psychological responses, hence possibly impacting on suicidal and self-injurious ideations.

CONCLUSIONS

With the current pharmacovigilance approach, no causality link between suicidal ideation and use of any GLP-1 RA can be inferred. There is a need for further research and vigilance in GLP-1 RA prescribing, particularly in patients with co-existing psychiatric disorders.

Stimulant and hallucinogenic novel psychoactive substances; an update

INTRODUCTION

The renewed interest in considering a range of stimulants, psychedelics and dissociatives as therapeutics emphasizes the need to draft an updated overview of these drugs' clinical and pharmacological issues.

AREAS COVERED

The focus here was on: stimulants (e.g. amphetamines, methamphetamine, and pseudoephedrine; phenethylamines; synthetic cathinones; benzofurans; piperazines; aminoindanes; aminorex derivatives; phenmetrazine derivatives; phenidates); classical (e.g. ergolines; tryptamines; psychedelic phenethylamines), and atypical (e.g. PCP/ketamine-like dissociatives) psychedelics.Stimulant and psychedelics are associated with: a) increased central DA levels (psychedelic phenethylamines, synthetic cathinones and stimulants); b) 5-HT receptor subtypes' activation (psychedelic phenethylamines; recent tryptamine and lysergamide derivatives); and c) antagonist activity at NMDA receptors, (phencyclidine-like dissociatives).

EXPERT OPINION

Clinicians should be regularly informed about the range of NPS and their medical, psychobiological and psychopathological risks both in the acute and long term. Future research should focus on an integrative model in which pro-drug websites' analyses are combined with advanced research approaches, including computational chemistry studies so that in vitro and in vivo preclinical studies of index novel psychoactives can be organized. The future of psychedelic research should focus on identifying robust study designs to convincingly assess the potential therapeutic benefits of psychedelics, molecules likely to present with limited dependence liability levels.

Neutropenia in patients under treatment with clozapine and COVID-19 infection

Introduction

Clozapine is among the most effective antipsychotics used for treatment resistant schizophrenia. Adverse reactions to clozapine include neutropenia. Case series report that clozapine-treated patients with COVID-19 have no documented neutropenia.

Objectives

We sought to investigate the potential adverse effect of coronavirus disease (COVID-19) in patients taking clozapine.

Methods

We retrospectively inspected data of 13 consecutive patients on clozapine, admitted to Highgate Mental Health Centre -Camden & Islington NHS Foundation Trust between March and June 2020. Selection was based on their COVID-19 symptoms presentation and/or COVID-19 positive test. We used a linear regression model with COVID status as independent variable and absolute neutrophil count (ANC) as dependent variable to inform about a correlation between COVID-19 status and neutrophil count. STATA was used for statistics.

Results

We collected data on thirteen patients of which nine were male. The median age was of 41.97 years; six subjects were Black, three were Asian and four were White Caucasian. Ten subjects tested positive to COVID-19 and 3 were suspected cases -these latter were excluded from stastical analysis. During COVID-19 infection, neutrophils count (ANC) dropped significantly to 4.215 from a baseline value of 5.337. The beta values of 0.83 shows that ANC declined significantly during COVID-19 infection (p =<.0001, R2 = 95%). In three of thirteen patients, ANC drop was significant and changed the patients’ monitoring status from green to amber and required frequent blood tests.

Conclusions

Clinicians should bear in mind that a significant drop in neutrophils count may occur in COVID-19 -infected patients taking clozapine.

Disclosure

No significant relationships.

New/emerging psychoactive substances and associated psychopathological consequences

BACKGROUND

The present paper provides an updated review of both the large number of new/novel/emerging psychoactive substances (NPS) and their associated psychopathological consequences. Focus was here given on identification of those NPS being commented in specialised online sources and the related short-/long-term psychopathological and medical ill-health effects.

METHODS

NPS have been identified through an innovative crawling/navigating software, called the 'NPS.Finder®', created in order to facilitate the process of early recognition of NPS online. A range of information regarding NPS, including chemical and street names; chemical formula; three-dimensional image and anecdotally reported clinical/psychoactive effects, were here made available.

RESULTS

Using the 'NPS.Finder®' approach, a few thousand NPS were here preliminarily identified, a number which is about 4-fold higher than those figures suggested by European and international drug agencies. NPS most commonly associated with the onset of psychopathological consequences included here synthetic cannabinoids/cannabimimetics; new synthetic opioids; ketamine-like dissociatives; novel stimulants; novel psychedelics and several prescription and over-the-counter medicines.

CONCLUSIONS

The ever-increasing changes in terms of recreational psychotropics' availability represent a relatively new challenge for psychiatry, as the pharmacodynamics and pharmacokinetics of many NPS have not been thoroughly understood. Health/mental health professionals should be informed about the range of NPS; their intake modalities; their psychoactive sought-after effects; the idiosyncratic psychotropics' combinations and finally, their medical and psychopathological risks.

Novel psychoactive substances

Over the last decade, the “traditional” drug scene has been supplemented – but not replaced – by the emergence of a range of novel psychoactive substances (NPS), which are either newly created or existing drugs, including medications, now being used in novel ways. By the end of 2015, in excess of 700 NPS had been reported by a large number of countries in the world. Most recent data show however that synthetic cathinones; synthetic cannabinoids; and psychedelics/phenethylamines; account for the largest number of NPS. Given the vast range of medical and psychopathological issues associated with the molecules here described, it is crucial for health professionals to be aware of the effects and toxicity of NPS. The “Drugs 2.0.” revolution facilitated the birth and growth of an “Online Drug Culture” which finds its main expression in chats/fora/blogs as well as the diffusion of online drug marketplaces (both in the surface and deep web). The web has progressively modified the drug market from a “street” into a “virtual” one, so by increasing the availability of new drugs/NPS/“legal highs” (“legal alternatives” to the traditional illegal drugs). The rapid pace of change in the NPS online market constitutes a major challenge to the provision of current and reliable scientific knowledge on these substances. The present lecture aims at providing an overview of the NPS phenomenon, also giving an overview of the main clinical and pharmacological issues relating to these most popular NPS categories.

Disclosure of interest

The authors have not supplied their declaration of competing interest.

New Psychoactive Substances (NPS) – a Challenge for the Addiction Treatment Services

Over the last few years, hundreds of new psychoactive substances (NPS) have been identified in Europe. Apart from some herbal compounds, NPS mainly include synthetic cannabinoids and a range of new synthetic stimulants (e. g., cathinones). Synthetic NPS are often developed whilst modifying the basic chemical (e. g., phenethylamine or tryptamine) structure. Although the pharmacology and toxicology of most NPS are hardly known, they are being offered, especially online, as “bath salts,” as “incense mixtures,” or under other misleading labels. In addition, NPS are advertised as “legal highs,” suggesting that, in contrast to substances regulated by the national laws, trading with NPS is legal. Although only little is known about the prevalence of NPS use, some of these molecules may be associated with a range of severe adverse reactions. Indeed, different from cannabis, synthetic cannabinoid users may present with epileptic seizures, loss of consciousness, and a range of persisting psychopathological disorders. Future studies should inform better-tailored management strategies.

Is addiction medicine part of psychiatry?

Addiction medicine/psychiatry, a medical subspecialty founded on October 1991 by the American Board of Psychiatry and Neurology, was granted as subspecialty within psychiatry. It mainly deals with medical assessment, diagnosis and treatment of subjects who suffer from an addiction (i.e. drug and/or alcohol addiction; gambling; sexual addiction; game addiction; and so on). Addiction psychiatry also deals with subjects in dual diagnosis, i.e. individuals with addiction issues along with co-occurring psychiatric disorders. However, despite its well established “dignity” to be part of psychiatry, most mental health's professionals believe that it is not a primarily psychiatric field due to the frequent co-occurrence of internistic/medical issues. In addition, the situation of psychiatric training specifically addressed to addiction is widely diversified across the European countries. Therefore, most psychiatrists do not possess specific qualifications and formation on this increasing field of psychiatry. The present lecture aims at providing an insight into the issues related to the diatribe between psychiatry and medicine on addiction medicine/psychiatry, specifically focusing on differences across European countries.

Disclosure of interest

The authors have not supplied their declaration of competing interest.

The "Eyeballing" technique: an emerging and alerting trend of alcohol misuse

OBJECTIVE

Alternative methods of alcohol consumption have recently emerged among adolescents and young adults, including the alcohol "eyeballing", which consist in the direct pouring of alcoholic substances on the ocular surface epithelium. In a context of drug and behavioural addictions change, "eyeballing" can be seen as one of the latest and potentially highly risky new trends. We aimed to analyze the existing medical literature as well as online material on this emerging trend of alcohol misuse.

MATERIALS AND METHODS

Literature on alcohol eyeballing was searched in PsychInfo and Pubmed databases. Results were integrated with a multilingual qualitative assessment of the database provided by The Global Public Health Intelligence Network (GPHIN) and of a range of websites, drug fora and other online resources between March 2013 and July 2013.

RESULTS

Alcohol eyeballing is common among adolescents and young adults; substances with high alcohol content, typically vodka, are used for this practice across the EU and internationally. The need for a rapid/intense effect of alcohol, competitiveness, novelty seeking and avoidance of "alcoholic fetor" are the most frequently reported motivations of "eyeballers". Local effects of alcohol eyeballing include pain, burning, blurred vision, conjunctive injection, corneal ulcers or scarring, permanent vision damage and eventually blindness.

CONCLUSIONS

Alcohol eyeballing represents a phenomenon with potential permanent adverse consequences, deserving the attention of families and healthcare providers. Health and other professionals should be informed about this alerting trend of misuse. Larger observational studies are warranted to estimate the prevalence, characterize the effects, and identify adequate forms of interventions for this emerging phenomenon.

Impact of community pharmacy diabetes monitoring and education programme on diabetes management: a randomized controlled study

AIMS

To evaluate the impact of a pharmacist-led patient education and diabetes monitoring programme on HbA(1c) and other cardiovascular risk factors in the community setting.

METHODS

Patients with Type 2 diabetes (n = 46) attending two community pharmacies in Hertfordshire, UK were randomized to one of two groups. Patients in the intervention group (n = 23) received a programme of education about diabetes, its treatment and associated cardiovascular risk factors. These patients were seen for monitoring/counselling by a community pharmacist on six occasions over a 12-month period. Measures included HbA(1c), BMI, blood pressure, blood glucose and lipid profile. Patients in the control group (n = 23) underwent these measurements at baseline and at 12 months only, without specific counselling or education over and above usual care.

RESULTS

HbA(1c) fell from 66 mmol/mol (8.2%) to 49 mmol/mol (6.6%) (P < 0.001) in intervention group, compared with reduction from 65 mmol/mol (8.1%) to 59 mmol/mol (7.5%) in the control group (P = 0.03). Blood pressure fell from 146/87 to 126/81 mmHg in the intervention group (P = 0.01) compared with no significant change in the control group (136/86 to 139/82 mmHg). Significant reductions in BMI (30.8 to 27 kg/m(2), P < 0.001) and blood glucose (8.8 to 6.9 mmol/l, P < 0.001) were also observed in the intervention group as compared with no significant changes in the control group. Lipid profile changes were mixed. In the intervention group, improvements were seen in diabetes-related quality of life (P = 0.001), diabetes knowledge (P = 0.018), belief about the need for medication (P = 0.004) and reduced concerns regarding medication (P < 0.001).

CONCLUSIONS

Education and counselling by community pharmacists can result in favourable improvements to the cardiovascular risk profile of patients with Type 2 diabetes.

Numerical simulations of Rayleigh-Taylor front evolution in turbulent stratified fluids

We present state-of-the-art numerical simulations of a two-dimensional Rayleigh-Taylor instability for a compressible stratified fluid. We describe the computational algorithm and its implementation on the QPACE supercomputer. High resolution enables the statistical properties of the evolving interface that we characterize in terms of its fractal dimension to be studied.

Differences in drug consumption, comorbidity and health service use of opioid addicts across six European urban regions (TREAT-project)

OBJECTIVES

This comparative study investigated consumption patterns, comorbidity and treatment utilization of opioid addicts in six European cities (Athens, Essen, London, Padua, Stockholm, Zurich).

SUBJECTS AND METHODS

Data were collected by structured face-to-face interviews. The representative sample comprises 599 addicts (100 patients per centre, 99 in London) at the start of a treatment episode.

RESULTS

Patients were dependent on opioids for about 10 years. Regional differences were significant regarding the patients' drug consumption pattern and their method of heroin administration (up to a fourth of the patients in Essen, London and Zurich usually smoke heroin). Concomitant use of benzodiazepines, cannabis and alcohol was common in all regions with the German and English samples showing the highest level of polydrug use. The prevalence of major depression was high in all regions (50%). Stockholm and London patients worry most about their physical health. Differences in the amount of needle sharing and especially in the use of public health service were prominent between the sites. Opioid addiction was a long-term disorder associated with a high burden of comorbidity and social problems in all cities.

CONCLUSION

The results of the study show significant interregional differences of opioid addicts which might require different treatment strategies in European countries to handle the problem.

The Gamblers' Temperament and Character Inventory (TCI) personality profile

In a cross-comparison study, the Cloninger's Temperament and Character Inventory (TCI) personality profile was administered to 28 probable pathological gamblers (PPGs), 32 nonpathological gamblers (non-PGs), and 65 controls. As a screening device, the validated Italian version of the South Oak Gambling Screen was administered to all subjects. Novelty Seeking (NS) values were higher in PPGs in comparison with both non-PGs (p < .05) and controls (p < .001). PPGs showed lower Self-Directedness (SD) and Cooperativeness (CO) values with respect to both non-PGs (p < .05 and p = .001, respectively) and controls (p < .001 and p = .001, respectively). The subsamples of PPGs reporting either a current substance misuse condition or a parental involvement in gambling/substance misuse showed higher NS (p = .01) and lower CO (p = .005) values than the remaining PPGs. A duration of problem gambling in excess of 20 years was associated with lower (p = .001) CO values. Specific temperamental (NS) and character (SD; CO) dimensions differentiated PPGs from both non-PGs and controls; assessment of personality profile with the TCI may identify at-risk social gamblers.

Review of Deaths Related to Analgesic- and Cough Suppressant-opioids; England and Wales 1996-2002

OBJECTIVE

The data on England and Wales voluntarily supplied by Coroners to the National Programme on Substance Abuse Deaths for the August 1996-December 2002 time frame were analyzed.

METHODS

All cases in which at least one analgesic- and cough suppressant-opioid other than heroin/morphine, methadone or buprenorphine was identified were extracted from the database. We hypothesized that: a) populations of addicts and non-addicts presented differences in patterns of drugs involved; and b) within the population of addicts and non-addicts, intentional and non-intentional deaths presented different patterns of substance consumption.

RESULTS

A total of 2024 deaths related to selected opioids, either alone or in combination, were included in the analysis. Typically, non-addicts were older than 45 and died as a result of intentional poisoning whilst majority of addicts were young, males and victims of accidental deaths. In about 93% of cases the selected opioids were reported in combination with another substance. Most frequently identified narcotics were propoxyphene, codeine and dihydrocodeine. Co-proxamol, Co-codamol and Co-dydramol were typically prescribed for non-addicts, whilst dihydrocodeine was mostly given to addicts. In non-addicts, alcohol was mostly represented in accidental deaths and antidepressants were typically represented in intentional deaths. Conversely, illicit drugs and hypnotics/sedatives were typically reported in addicts' accidental deaths.

CONCLUSIONS

The present report constitutes the largest available collection of analgesic- and cough suppressant-opioid mortality data in the UK. Users should be educated about risks associated with polydrug misuse.

Salvia divinorum - Präsenz einer neuen Droge im Internet

AIM OF THE STUDY

The German pages of the Internet were searched for the presence of the hallucinogenic herbal drug Salvia divinorum, which is not dealt with in current addiction medicine or psychiatric text books. The investigation is part of the EU sponsored project "Psychonaut" as preparatory work for the development of an Internet-based early warning system.

METHODS

The first 100 websites of the search using "Salvia divinorum" were compared with the search results for "cannabis" and "LSD". The following aspects of the sites were especially analyzed: the originator, marketing of drugs, and the attitude towards drug use.

RESULTS

Salvia was offered for sale on approximately a third of the sites (29%); cannabis and LSD were not marketed on any sites. Official websites such as those from governmental organizations or universities were seldom found when searching for "Salvia divinorum", and then only under the last hits. The percentage of institutional sites (e. g. public organizations) were 12% with Salvia, 21% with cannabis, and 38% with LSD. A drug-friendly attitude was found at 64 % of the sites with regard to Salvia, 58% for cannabis, and 24% for LSD.

CONCLUSION

The drug help system must be aware of that the Internet is a source of drug-related information, and of drug trade. As this investigation shows, sites often have a drug-friendly attitude. The low availability of official information on Salvia divinorum (also outside the Internet) relative to the presence of drug-friendly or drug trading sites is an indication that new trends of drug consumption can be tracked in the Internet before they will be found in official literature.

Pattern of cannabis use in ecstasy polydrug users: moderate cannabis use may compensate for self-rated aggression and somatic symptoms

Cannabis is one of the most common 'co-drugs' for ecstasy users. The aim of the present study was to explore self-reported psychobiological problems in ecstasy polydrug users in relation to their pattern of cannabis use. Two hundred and eighty ecstasy polydrug users were allocated into five cannabis groups according to the frequency of their cannabis use. The control group comprised 121 alcohol-tobacco users. There were no significant group differences with regard to age, diagnosed family psychiatric history and level of self-rated stress experienced during 6 months prior to the study. The present study produced three main findings: (a) Ecstasy users with no concomitant use of cannabis displayed more self-rated aggression and somatic symptoms compared with ecstasy users who were smoking cannabis on a monthly or weekly basis. (b) Ecstasy users who reported heavy cannabis use in the past displayed higher paranoid symptoms compared with ecstasy weekly and daily cannabis users. (c) Former heavy cannabis users were the most likely to complain of a variety of ecstasy related long-term problems. In conclusion, moderate cannabis use may help to ameliorate or mask MDMA-induced aggressivity and somatic symptoms. However, this study confirms that heavy cannabis and ecstasy use is associated with several psychobiological problems, which may emerge after a period of abstinence from both drugs.

Death rates from ecstasy (MDMA, MDA) and polydrug use in England and Wales 1996-2002

The present study reports on all deaths related to taking ecstasy (alone, or in a polydrug combination) occurring in England and Wales in the time frame August 1996-April 2002. Data presented here are based on all information recorded in the National Programme on Substance Abuse Deaths (np-SAD) database. The np-SAD regularly receives all information on drug related deaths in addicts and non addicts from coroners. A total of 202 ecstasy-related fatalities occurred in the chosen time-frame, showing a steady increase in the number of deaths each year. The ratio male:female was 4:1 and 3 of 4 victims were younger than 29. In 17% of cases ecstasy was the sole drug implicated in death and in the remaining cases a number of other drugs (mostly alcohol, cocaine, amphetamines and opiates) have been found. According to toxicology results, MDMA accounted for 86% of cases and MDA for 13% of cases; single deaths were associated with MDEA and PMA. This is the largest sample of ecstasy related deaths so far; possible explanations are given for the observed steady increase in ecstasy-related deaths and a tentative 'rationale' for this polypharmacy combination is then proposed.

Potential human neurotoxicity of MDMA ('Ecstasy'): subjective self-reports, evidence from an Italian drug addiction centre and clinical case studies

The present paper attempts to give an updated overview of the magnitude of the phenomenon of ecstasy abuse in Italy and other European countries. It gives an account of some clinical case studies and of a larger-scale report on polydrug (including MDMA) consumers attending our Public Health Addiction Treatment Unit in recent years, with a view to clarifying the characteristics and psychopathological consequences (mainly depression, psychotic disorders, cognitive disturbances, bulimic episodes, impulse control disorders, panic disorders, social phobia) of MDMA consumption. Longer-term, larger-dose (acute or cumulative) MDMA consumers were found to be at high risk of developing these psychopathological disturbances. A tentative description of certain personological dimensions of ecstasy consumers is also given (the novelty-seeking dimension was characteristic of those who occasionally experimented with the drug) while those who ingested larger quantities revealed low harm avoidance scores). Results are discussed in the light of the complex and different methodological issues arising from this kind of study, in which MDMA is far from being the only drug of abuse.

MDMA ('ecstasy') consumption in the context of polydrug abuse: a report on 150 patients

The present study examined the characteristics and the possible psychopathological consequences of ecstasy (MDMA, 3,4-methylenedioxymethamphetamine) use. One hundred and fifty consecutive patients, presenting to the Padova (Italy) Addiction Treatment Unit and who had taken ecstasy on at least one occasion, were examined and studied using a semi-structured interview. Ninety-five percent of the patients had experimented with another drug of abuse at least once in their lifetime. Ecstasy was mainly self-administered at disco clubs, and reported acute psychoactive effects confirmed previous reports. Fifty-three percent of the total sample were found to be affected by one or more psychopathological problems; the most frequent were depression, psychotic disorders, cognitive disturbances, bulimic episodes, impulse control disorders, panic disorders, social phobia. Those who were free from any psychopathological problem, compared to the others, had taken a smaller number of MDMA tablets in their lifetime, for a shorter duration and with a lower frequency. Again, they were less likely to have used alcohol together with ecstasy but more likely to have used opiates. Longer-term, larger dosage (acute or cumulative) MDMA consumers were found to be at high risk of developing psychopathological disturbances. The results are discussed, taking into account both the ecstasy suggested serotonin (5-hydroxytryptamine) neurotoxicity and the various methodological issues pertaining to this kind of large-scale clinical study describing people for whom MDMA is far from being the only drug of abuse.

Efficacy of venlafaxine in depressive illness in general practice

A double-blind, placebo-controlled study of 229 patients with a Research Diagnostic Criteria diagnosis of major, minor or intermittent depression was used to compare the clinical profiles of venlafaxine and imipramine in general practice. Venlafaxine produced a significant improvement compared to placebo in symptoms of depression and anxiety as rated by the total MADRS and percentage of responders, the CGI improvement, the CGI severity of illness, the BSA psychic anxiety item and the HSCL. On a number of these measures, venlafaxine was also significantly more effective than imipramine. Venlafaxine was significantly superior to both imipramine and placebo for the SARS total score and the items 'social/leisure' and 'extended family.' A similar proportion of patients discontinued treatment in each group, but fewer patients on venlafaxine discontinued treatment because of an unsatisfactory response.

Pharmacological models of memory dysfunction? A comparison of the effects of scopolamine and lorazepam on word valence ratings, priming and recall

The effects of scopolamine (0.3, 0.6 mg IM) lorazepam (2 mg oral) and placebo on word valence ratings, priming and word recall were assessed in a double-blind independent group design with 36 subjects. Subjects given active drugs rated words as having more of an affective load than subjects given placebo. Priming, as assessed in a word-stem completion task, was not significantly affected by any treatment. Word recall showed some impairment following all active treatments. Performance on the stem completion task was unrelated to subjectively rated sedation but did not relate to word-valence ratings in different ways across drug treatments. Performance on the recall task was unrelated to valence ratings but did relate to the sedative effects on lorazepam. Implications are drawn out for pharmacological models of memory dysfunction.

Clinical efficacy of gamma-hydroxybutyric acid in treatment of opiate withdrawal

This paper describes the role of gamma-hydroxybutyric acid (GHB) in the treatment of opiate withdrawal syndrome. In the two patients described, after having abruptly withdrawn from long-term methadone treatment, GHB was orally administered (each dose given every 4-6 h) for 8-9 days. The GHB showed both a high efficacy (some mild and transient symptoms attributable to opiate withdrawal were observed, but only in the first days of therapy) and a good tolerability (no clinical phenomena interpreted as GHB side effects were found). These results could be of interest in improving the pharmacological treatment of drug addiction.

Can pharmacological intervention aid in the prevention of suicidal behavior?

The paper reviews the efficacy of various psychotropic drugs (antidepressants, neuroleptics, benzodiazepines, carbamazepine, lithium) in th prevention of suicidal behavior, dealing with the issue from both treatment and research perspectives. The clinical pharmacology of aggressive behavior is also briefly reviewed, as an understanding of this aspect is likely to shed some light on the main topic of the paper.

Lithium alone or in combination with carbamazepine for the treatment of rapid-cycling bipolar affective disorder

The authors retrospectively examined the clinical outcome (after 1, 2 and 5 years of beginning the therapeutic protocols) for 16 rapid-cycling bipolar affective disorder patients given either lithium alone or lithium plus carbamazepine. The results suggest that both therapeutic protocols have been safe and clinically effective. However, improvement was observed earlier in the patients given lithium and carbamazepine.

Excessive use of anticholinergic drugs in a sub-sample of Italian schizophrenics

Compliance to the prescription of anticholinergic drugs in 274 consecutive schizophrenic outpatients has been assessed retrospectively from their clinical records. Ten point four percent of the sample (22 patients) took these drugs in amounts greater than those prescribed. Some possible explanations of this excessive use are discussed.

Models of memory dysfunction? A comparison of the effects of scopolamine and lorazepam on memory, psychomotor performance and mood

The effects on memory, psychomotor functions and mood of intramuscular scopolamine (0.3 mg, 0.6 mg) were compared with those of oral lorazepam (2 mg) and placebo. Thirty-six volunteers took part in a double-blind, independent groups design. Subjects completed a battery of tests 1 and 3 h after drug administration. Both doses of scopolamine produced levels of sedation comparable to that produced by lorazepam. The time course of effects of scopolamine and lorazepam differed but the pattern of psychomotor impairments and amnestic effects produced was very similar. In terms of mood, lorazepam had an anxiolytic effect whereas scopolamine increased ratings of anxiety. Levels of sedation, indexed by either subjective ratings or motor retardation (tapping speed), were related more to psychomotor performance than to performance on memory tasks. The results suggest that benzodiazepines and scopolamine have similar amnestic and sedative effects and as such may not offer distinct models of memory dysfunction.

Naltrexone for heroin addiction: encouraging results from Italy

This report provides preliminary data regarding compliance rates of naltrexone (NTX) treatment for 99 consecutive heroin addicts. NTX was administered orally after a 3-13-day drug induction period. Fifteen out of the 99 patients who underwent naloxone challenge are still being treated (having taken NTX for less than 6 months to date). Of the 52 patients who completed the drug induction period, 22 (41.31%) showed satisfactory results (in terms of treatment compliance and/or opiate-free conditions at 6-month follow-up). The 52 patients who properly started regular NTX assumption stayed with the treatment for a mean 17.04 +/- 8.2 weeks. These results would demonstrate a higher than average success with NTX treatment of randomly selected heroin addicts with respect to the literature and would seem related to particularly favorable socio-cultural conditions in northern Italy (where the study was carried out).