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Methadone treatment reduces the use of heroin and withdrawal symptoms; however, methadone is an expensive medication with a narrow safety margin. We compared the retention rates, persistence of heroin use, and quality of life of a group of patients undergoing conventional Methadone Maintenance Treatment (MMT) with a group for whom the CYP2B6 516G>T polymorphism was used in addition to the MMT to calculate the required methadone dose. Over 12 weeks, the retention rate, heroin usage, and quality of life of patients under conventional treatment (n = 34) were compared with those of patients for whom we used genetic markers to calculate methadone dosage (n = 38). At the end of the study, 26.4% of patients abandoned the program, and neither demographic nor clinical variables were associated with treatment adherence. Of the remaining patients, 16% of the control group and 8% of patients in the pharmacogenetic group reported heroin use, while both groups showed a 64% reduction in the use of cocaine/crack (no significant differences between the groups were found). Starting in the second week, the methadone dosage was lower among the patients for whom methadone was prescribed based on genotype. Although there were six individuals in the control group and three in the pharmacogenetic group with QTc intervals > 450 ms (a threshold that is considered dangerous), we did not find a relationship between the QTc interval and methadone dosage. There were no differences in the perception of quality of life between the two groups. The results of this pilot study suggest that concerning methadone therapy, the CYP2B6 genotype contributes to reduced effective doses and treatment costs.

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People who inject drugs (PWIDs) are a key population targeted in global efforts to increase HIV and Hepatitis C virus (HCV) diagnosis, linkage to care, and treatment retention. Colombia has experienced a significant increase in the incidence of HIV and HCV attributed to the alarming rise in injection drug use. The primary aim of this study was to identify factors influencing access to HIV and HCV care among PWIDs. Survey domains consisted of (1) sociodemographic characteristics; (2) history of HIV-HCV testing and infection status; (3) the 13-item questionnaire developed by Awad and colleagues to explore barriers to HIV and HCV testing, (4) the Barriers to Medical Care questionnaire; and (5) the Risk Assessment Battery. A total of 171 subjects completed the survey. A high proportion of participants reported past year testing for HIV (87%) and HCV (72.8%). However, most respondents elicited numerous barriers to obtaining information, referrals, and insurance coverage for accessing HIV and/or HCV care. Further studies are needed to identify scalable public health measures to overcome these barriers.

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RESUMEN INTRODUCCIÓN: La leucoencefalopatia tóxica es una afección que compromete la sustancia blanca por exposición a sustancias tóxicas. La heroina es una de las implicadas en el desarrollo de la leucoencefalopatia con diferencias exclusivas que suceden con la inhalación según las diversas técnicas en comparación al uso intravenoso, bien sea de la heroína o de otras sustancias psicoactivas. En esta serie describimos cinco casos, de sexo masculino, que desarrollaron leucoencefalopatia espongiforme por heroína (LEH) posterior a la inhalación de vapores, en un hospital del sistema de salud público en la ciudad de Armenia, Colombia. OBJETIVO: El objetivo de este estudio es describir las características demográficas, clínicas, hallazgos de laboratorio e imágenes diagnósticas, así como la mortalidad asociada a LEH en la muestra estudiada. MÉTODOS: Recolección de datos de historias clinicas y búsqueda de imágenes registradas en el Hospital San Juan de Dios de Armenia durante el periodo 2017-2018. RESULTADOS: Se obtienen cinco casos clínicos de pacientes usuarios de vapores inhalados de heroina, quienes ingresan con signos neurológicos de predominio motores y extrapiramidales, con el signo radiológico clásico de "Chasing the Dragon" en estudios de TC cerebral simple en todos los casos. De los cinco casos se presenta un deceso, determinando una mortalidad de 20% comparado con un 25% de mortalidad reportado en la literatura. CONCLUSIONES: La LEH suele estar subdiagnosticada dado que suele confundirse con un trastorno neuropsiquiatríco o de la conducta asociada al consumo de sustancias psicoactivas (SPA), el diagnóstico se realizó con los hallazgos típicos en las imágenes de TC cerebral simple. Se debe tener en cuenta las estadísticas sobre consumo de heroína a la hora de realizar el abordaje de un paciente con historial de consumo de SPA y los signos neurológicos para relacionarlos con esta etiologia y dar un manejo integral a estos pacientes.

ABSTRACT IlNTRODUCTION: Toxic leukoencephalopathy is a condition that compromises the encephalic white matter due to exposure to toxic substances. Heroin is one of those involved in the development of leukoencephalopathy and there are certain differences that occur with its inhalation with the different techniques compared to intravenous use, either heroin or other psychoactive substances. In this serie, we describe five cases of male sex who developed heroin spongiform leukoencephalopathy (HSLE) after inhalation of vapors, in a Hospital of the public health system in the city of Armenia, Colombia. OBJECTIVES: The objective of this study is to describe the demographic and clinical characteristics, laboratory findings and diagnostic images, as well as the mortality associated with HSLE in the sample studied. METHODS: Collection of data from medical records and search of images registered at the San Juan de Dios Hospital in Armenia during the period 2017-2018. RESULTS: Five clinical cases were obtained of patients who were users of inhaled heroin vapors and were admitted to the hospital with predominantly motor and extrapyramidal neurological signs, with simple brain CT studies showing the classic radiological sign of "Chasing the Dragon" in all five cases. One death was presented, with a mortality of 20% compared to the 25% mortality that has been reported in the scientific literature. CONCLUSIONS: HSLE is usually underdiagnosed since it is often confused with a neuropsychiatric or behavioral disorder associated with the consumption of psychoactive substances (PAS). The diagnosis was made with the typical findings in simple brain CT images. Statistics on heroin use must be considered when approaching a patient with a history of PAS use and neurological signs, to relate them to this etiology and provide comprehensive management to these patients.

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Clinical trials have indicated that a vaccine must be immunogenic in genetically diverse human populations and that immunogenicity and protective efficacy in animal models are two key indices required for the approval of a new vaccine. Additionally, the immune response (immunogenicity) and immunoprotection are dependent on the mouse strain. Therefore, the objective of the present study was to determine the immune response (immunogenicity) and the protective efficacy (behavioral response) in three inbred mouse strains immunized with the M6TT vaccine. Female BALB/c, C57Bl/6, and DBA/2 inbred mice were immunized with the M6-TT vaccine. A solid-phase antibody-capture ELISA was used to monitor antibody titer responses after each booster dose in vaccinated animals. The study used tail-flick testing to evaluate the antinociceptive effects induced by heroin. Additionally, heroin-induced locomotor activity and place preference were evaluated. The M6-TT vaccine was able to generate a specific antibody titer in the three inbred mouse strains evaluated. The antibodies reduced the antinociceptive effect of different doses of heroin. In addition, they decreased the heroin-induced locomotor activity and place preference. These findings suggest that the M6-TT vaccine generates a powerful immunogenic response capable of reducing the antinociceptive and reinforcing effects of heroin in different inbred mouse strains, which supports its possible future use in clinical trials in genetically diverse human populations.

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Historically, the poppy plant has had multiple uses including as a food product and with medical uses in pain relief; today it is most commonly known as the plant from which heroin is derived. The United Nations international drug control regime currently only allows legal poppy production for medical use in 19 countries. Although Mexico is the third largest illegal poppy producer in the world, no Latin American country is currently allowed to legally produce poppies. Meanwhile, the United States and Canada are experiencing an overdose crisis due in large part to the adulteration and substitution of heroin with fentanyl and its analogues, while the price of opium gum has dropped 80% in the last two years in poppy producing areas of Mexico. The prohibition of opium has wide ranging health and development impacts that bring up a moral imperative regarding the safe supply of diverse opium-based products -including opium gum and heroin- that urgently need to be explored and addressed. Opium gum can be used orally or smoked, reducing riskier modes of administration and possible fatal overdoses. This article discusses the political and legal possibilities of safely supplying opium gum and manually extracted heroin from Mexico to Canada as a public health, harm reduction and development policy.

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OBJECTIVES: To describe trends in the number of youths diagnosed with opioid use disorder (OUD) and to identify factors associated with OUD diagnosis in acute care settings. STUDY DESIGN: Data from a population-based retrospective cohort study with linkage of 6 health administrative databases for 13 009 youth age 12-24 years identified with OUD between 2001 and 2018 in British Columbia, Canada were used to describe annual diagnoses. Using a multiple logistic regression model, we estimated the association between past-year health care utilization and OUD diagnosis in acute settings, controlling for sociodemographic and OUD-related comorbid conditions. RESULTS: Annual OUD diagnoses quadrupled between 2003 and 2017 (from 326 to 1473). Among the 6579 youth diagnosed with OUD between April 1, 2013 and September 30, 2018, 88.1% had past-year health system contacts. Youth age 12-18 had higher odds of OUD diagnosis in acute care (aOR 2.04; 95% CI 1.78, 2.34). Compared with no health care contact, youth receiving outpatient care only were less likely to be diagnosed with OUD in acute care (aOR 0.69; 95% CI 0.56, 0.84) and those with >1 urgent hospitalization were more likely to be diagnosed with OUD in acute care (aOR 1.87; 95% CI 1.40,2.49). CONCLUSIONS: More than 88% of youth had past-year health system contacts prior to diagnosis. Those age 12-18 years and with urgent hospitalizations in the year prior to diagnosis were more likely to have OUD diagnosed in acute care settings. Establishing an effective evidence-based system for early detection and intervention among youth with OUD must be a priority.

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Outbreaks of wound botulism are rare, but clinicians and health departments should maintain suspicion for signs, symptoms, and risk factors of wound botulism among persons who inject drugs in order to initiate treatment quickly. This report describes an outbreak of three wound botulism cases among persons in two adjacent counties who injected drugs. Provisional information about these cases was previously published in the CDC National Botulism Surveillance Summary. All three cases in this outbreak were laboratory-confirmed, including one case with detection of botulinum toxin type A in a wound culture sample taken 43 days after last possible heroin exposure. Findings highlight the delay in diagnosis which led to prolonged hospitalization and the persistence of botulinum toxin in one patient.

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Resumo Fundamento Atualmente, o vício em heroína é um problema de saúde preocupante, e as informações sobre os efeitos eletrocardiográficos da heroína são limitadas. Objetivos O objetivo do presente estudo é investigar os efeitos da dependência de heroína em parâmetros eletrocardiográficos. Métodos Um total de 136 indivíduos, incluindo 66 indivíduos que fumam heroína como grupo de estudo e 70 indivíduos saudáveis sem dependência de drogas como grupo de controle, foram incluídos no estudo. Indivíduos que injetam heroína foram excluídos. A avaliação eletrocardiográfica (ECG) dos usuários de heroína foi realizada e comparada com as do grupo controle. Além disso, os ECGs pré e pós-tratamento do grupo usuário de heroína foram comparados. Um valor de p<0,05 foi aceito como estatisticamente significativo. Resultados A frequência cardíaca (77,2±12,8 versus 71,4±11,2; p=0,02) foi maior no grupo usuário de heroína em comparação com o grupo controle. Os intervalos QT (341,50±25,80 versus 379,11±45,23; p=0,01), QTc (385,12±29,11 versus 411,3±51,70; p<0,01) e o intervalo do pico ao fim da onda T (Tpe) (65,41±10,82 versus 73,3±10,13; p<0,01) foram significativamente menores no grupo usuário de heroína. Nenhuma diferença foi observada entre os grupos com respeito às razões Tpe/QT e Tpe/QTc. Na análise de subgrupo do grupo usuário de heroína, os intervalos QT (356,81±37,49 versus 381,18±40,03; p<0,01) e QTc (382,06±26,41 versus 396,06±29,80; p<0,01) foram significativamente mais curtos no período pré-tratamento. Conclusão O vício em heroína afeta significativamente os intervalos de tempo QT, QTc e Tpe. Os efeitos de arritmia desses parâmetros já são conhecidos. Os parâmetros eletrocardiográficos desses indivíduos merecem mais atenção. (Arq Bras Cardiol. 2020; 115(6):1135-1141)

Abstract Background Heroin addiction is currently a significant health problem, and information on the electrocardiographic effects of heroin is limited. Objetivo The aim of the present study is to investigate effects of heroin addiction on electrocardiographic parameters. Methods A total of 136 individuals, including 66 individuals who smoke heroin as the study group and 70 healthy individuals with no drug addiction as the control group, were included in the study. Individuals who inject heroin were excluded. Electrocardiographic (ECG) evaluation of those using heroin was performed and compared with those of the control group. In addition, pre-treatment and post-treatment ECG of the heroin group were compared. A p-value of <0.05 was accepted as statistically significant. Results Heart rate (77.2±12.8 versus 71.4±11.2; p=0.02) were found to be higher in the heroin group compared to the control group. QT (341.50±25.80 versus 379.11±45.23; p=0.01), QTc intervals (385.12±29.11 versus 411.3±51.70; p<0.01), and T peak to end time (Tpe) (65.41±10.82 versus 73.3±10.13; p<0.01) were significantly shorter in the heroin group. No difference was observed between the groups with regard to Tpe/QT and Tpe/QTc ratios. In the subgroup analysis of the heroin group, QT (356.81±37.49 versus 381.18±40.03; p<0.01) and QTc (382.06±26.41 versus 396.06±29.80; p<0.01) intervals were significantly shorter in the pre-treatment period. Conclusion Heroin addiction significantly affects the QT, QTc, and Tpe time intervals. The arrhythmia effects of these parameters are well known. More attention to the electrocardiographic parameters of these individuals should be given. (Arq Bras Cardiol. 2020; 115(6):1135-1141)

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Leukoencephalopathy is a myelin disorder caused by multiple agents, including substance abuse. A 28-year-old man arrived at the emergency department having suffered from asthenia, dizziness, disorientation and ataxia for two months. He had a two-year history of heroin inhalation. He arrived in a normal physical condition. Brain magnetic resonance showed bilateral diffuse hypointense lesions in the white matter. At day 3 after admission, he presented neurological deterioration, stupor, haemodynamic instability, respiratory failure, and died. Toxic leukoencephalopathy symptoms start with inattention, memory and personality changes, and may eventually cause dementia and death. Heroin inhalation is a common practice and can lead to leukoencephalopathy. Leukoencephalopathy associated with heroin inhalation is a rare entity that mainly affects young adults and has a high social impact. Its aetiology is unclear, it has no effective treatment and there is a high mortality rate. Heroin consumption is on the rise in Colombia, so TL should be considered by medical staff.

La leucoencefalopatía es una patología de la mielina producida por múltiples agentes, incluidas las sustancias de abuso. Un varón de 28 años llegó urgencias por 2 meses de astenia, mareo, desorientación y ataxia. Tenía antecedentes de consumo inhalado de heroína por 2 años. Presentaba condiciones físicas regulares. La resonancia magnética cerebral mostró lesiones hipointensas difusas bilaterales en la sustancia blanca. Al tercer día presentó empeoramiento de su estado neurológico, estupor, inestabilidad hemodinámica, insuficiencia respiratoria y muerte. Los síntomas de leucoencefalopatía tóxica (LT) comienzan con falta de atención, cambios en la memoria y la personalidad, y finalmente demencia y muerte. El consumo de heroína inhalada es una práctica frecuente con riesgo de que produzca LT. La leucoencefalopatía asociada con el uso de heroína inhalada es una entidad rara que afecta principalmente a adultos jóvenes y tiene un alto impacto social. Su etiología no está clara, no tiene un tratamiento efectivo y tiene altas tasas de mortalidad. El consumo de heroína está aumentando en Colombia, por lo que el personal médico debe tener en cuenta la LT.