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Abstract Background The effect of regional analgesia on perioperative infectious complications remains unknown. We therefore tested the hypothesis that a composite of serious infections after colorectal surgery is less common in patients with regional analgesia than in those given Intravenous Patient-Controlled Analgesia (IV-PCA) with opiates. Methods Patients undergoing elective colorectal surgery lasting one hour or more under general anesthesia at the Cleveland Clinic Main Campus between 2009 and 2015 were included in this retrospective analysis. Exposures were defined as regional postoperative analgesia with epidurals or Transversus Abdominis Plane blocks (TAP); or IV-PCA with opiates only. The outcome was defined as a composite of in-hospital serious infections, including intraabdominal abscess, pelvic abscess, deep or organ-space Surgical Site Infection (SSI), clostridium difficile, pneumonia, or sepsis. Logistic regression model adjusted for the imbalanced potential confounding factors among the subset of matched surgeries was used to report the odds ratios along with 95% confidence limits. The significance criterion was p < 0.05. Results A total of 7811 patients met inclusion and exclusion criteria of which we successfully matched 681 regional anesthesia patients to 2862 IV-PCA only patients based on propensity scores derived from potential confounding factors. There were 82 (12%) in-hospital postoperative serious infections in the regional analgesia group vs. 285 (10%) in IV-PCA patients. Regional analgesia was not significantly associated with serious infection (odds ratio: 1.14; 95% Confidence Interval 0.87‒1.49; p-value = 0.339) after adjusting for surgical duration and volume of intraoperative crystalloids. Conclusion Regional analgesia should not be selected as postoperative analgesic technique to reduce infections.

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BACKGROUND: The effect of regional analgesia on perioperative infectious complications remains unknown. We therefore tested the hypothesis that a composite of serious infections after colorectal surgery is less common in patients with regional analgesia than in those given Intravenous Patient-Controlled Analgesia (IV-PCA) with opiates. METHODS: Patients undergoing elective colorectal surgery lasting one hour or more under general anesthesia at the Cleveland Clinic Main Campus between 2009 and 2015 were included in this retrospective analysis. Exposures were defined as regional postoperative analgesia with epidurals or Transversus Abdominis Plane blocks (TAP); or IV-PCA with opiates only. The outcome was defined as a composite of in-hospital serious infections, including intraabdominal abscess, pelvic abscess, deep or organ-space Surgical Site Infection (SSI), clostridium difficile, pneumonia, or sepsis. Logistic regression model adjusted for the imbalanced potential confounding factors among the subset of matched surgeries was used to report the odds ratios along with 95% confidence limits. The significance criterion was p < 0.05. RESULTS: A total of 7811 patients met inclusion and exclusion criteria of which we successfully matched 681 regional anesthesia patients to 2862 IV-PCA only patients based on propensity scores derived from potential confounding factors. There were 82 (12%) in-hospital postoperative serious infections in the regional analgesia group vs. 285 (10%) in IV-PCA patients. Regional analgesia was not significantly associated with serious infection (odds ratio: 1.14; 95% Confidence Interval 0.87‒1.49; p-value = 0.339) after adjusting for surgical duration and volume of intraoperative crystalloids. CONCLUSION: Regional analgesia should not be selected as postoperative analgesic technique to reduce infections.

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RESUMEN El abordaje de pacientes intoxicados que presentan antecedentes de patología psiquiátrica supone un reto en la atención médica. La presencia de una patología dual puede conducir a que algunos síntomas somáticos sean desestimados y no se consideren como manifestación de una posible patología grave subyacente. Se reporta el caso de una paciente que, durante su hospitalización debida a un episodio depresivo, presentó una sobredosis incidental de opioides. Al recuperarse de ella, sin embargo, presentó comportamiento desorganizado e ideas delirantes, inicialmente atribuidas a la depresión. Estudios ulteriores demostraron una causa orgánica grave subyacente: lesión isquémica bilateral del globo pálido. Se analiza el cuadro clínico a la luz de la literatura pertinente, abordando los temas de delirium, espectro clínico debido a las lesiones del globo pálido y finalizando con una breve descripción sobre la sobredosis y neurotoxicidad por opioides. Frente a síntomas no concordantes con la evolución usual de una descompensación psicopatológica o una intoxicación por drogas, debe ahondarse en la exploración de posibles causas orgánicas, objetivo para el cual se sugiere considerar estudios de neuroimágenes en todo paciente que experimente una sobredosis de opioides y que posteriormente presente graves manifestaciones de una alteración cognitiva.

SUMMARY The approach to intoxicated patients with a previous history of psychopathological manifestations represents a challenge to medical care. The presence of a dual pathology can lead to somatic symptoms being dismissed and not considered as possible manifestations of a serious underlying pathology. We report the case of a patient who, during her hospitalization for a depressive episode, presented an incidental opioid overdose. Upon recovery, she presented disorganized behavior and delusions, initially attributed to her depression. Further studies demonstrated, however, a serious underlying organic cause: A bilateral ischaemic injury of the globus pallidus. The clinical picture is analyzed in the light of the relevant literature, addressing the issues of delirium, clinical spectrum of globus pallidus lesions and ending with a brief description of opioid overdoses and neurotoxicity. Faced with symptoms that are not consistent with the usual course of a psychopathological decompensation or drug intoxication, possible organic causes should be delved into. It is suggested that neuroimaging studies be considered in any patient who suffers from an opioid overdose and who later presents severe cognitive alterations.

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Over the past 15 years, the increasing nonmedical use of tropicamide ophthalmic drops has been reported in Europe, coinciding with an increase in opioid addiction and drug-related mortality. Although tropicamide is generally known as a cheap alternative to heroin in Eastern Europe, it still appears to be a relatively new phenomenon that has arisen over the last decade. A narrative review was conducted of all the relevant sources published in more than five countries between January 1, 1975 and January 10, 2021. For bibliographic accuracy, the materials published in Russian and Italian were professionally translated to English. During the preparation of this report, we were able to interview five Russian-speaking patients who injected tropicamide in the past and we discuss another case of intravenous tropicamide use. This review was acknowledged by the institutional review board of the University of Missouri-Kansas City. All patients interviewed at the Unica Medical Center consented for their clinical information to be reported in a medical publication. We analyzed data from 50+ various sources and covered a variety of drug-related issues, including information on the extent, patterns, and trends in tropicamide use, its health consequences, and other clinical findings. The information provided in this article may help providers better detect tropicamide abuse and incorporate new rehabilitation strategies into the management of these patients.

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actualmente existe una intensa prescripción de opioides para el manejo de todo tipo de dolor a nivel clínico, razón por la cual es importante considerar los posibles daños derivados de esta actividad, tales como tolerancia, adicción, dependencia y sobredosis. La medicación de opiáceos o sus derivados de manera irracional para el manejo del dolor agudo o crónico puede ser la puerta de entrada a las drogodependencias. Muchos adictos a opiáceos informaron haber estado expuestos por primera vez a los opioides a través de una prescripción médica para el tratamiento del dolor. Por ello, es importante evaluar por parte de los profesionales de la salud el uso a largo plazo de estos medicamentos para el manejo del dolor, porque estudios han evidenciado una relación entre el uso clínico y la dependencia de estos, sobre todo en adolescentes y adultos jóvenes sin experiencia en opiáceos que fueron sometidos a procedimientos quirúrgicos y dentales.

Currently, opioids for managing all types of pain are increasingly prescribed at the clinical level, which is why it is important to consider the potential harms derived from this practice, such as tolerance, addiction, dependence, and overdose. Irrational medication of opioids or opioid derivatives for acute or chronic pain management can be the gateway to drug dependence. Many opioid addicts reported first being exposed to opioids after receiving a physician's prescription for pain management. Therefore, health professionals need to evaluate the long-term use of these medications to manage pain because studies have shown a relationship between clinical use and opioid dependence, especially in adolescents and young adults who had never received opioid therapy and who underwent surgical and dental procedures

Atualmente existe uma intensa prescrição de opioides para o manejo de todos os tipos de dor em nível clínico, por isso é importante considerar os possíveis danos decorrentes dessa atividade, como tolerância, adição, dependência e overdose. A medicação de opiáceos ou seus derivados de forma irracional para o manejo da dor aguda ou crônica pode ser a porta de entrada para a adição a drogas. Muitos dependentes de opioides relataram ter sido expostos a opioides pela primeira vez por meio de uma receita médica para o tratamento da dor. Por esse motivo, é importante que os profissionais de saúde avaliem o uso prolongado desses medicamentos para o manejo da dor, pois estudos têm mostrado relação entre o uso clínico e a dependência dos mesmos, principalmente em adolescentes e adultos jovens sem experiência com opioides que foram submetidos a procedimentos cirúrgicos e odontológicos

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ABSTRACT BACKGROUND AND OBJECTIVES: Persistence of pain in the postoperative thoracic region is very common with conventional analgesia performed only with opioids, which prolongs recovery, increasing costs and morbidity. Erector spinae plane blockage is a promising technique for the analgesic control in the postoperative period of cardiac surgeries. The purpose of this study was to describe a case in which erector spinae plane blockage provided adequate postoperative analgesic control. CASE REPORT: A 61-year-old male patient submitted to elective cardiac surgery for left ventricular aneurysmectomy and coronary artery bypass grafting. On the first postoperative day presented pain of intensity 8 on the visual analog scale in the left hemithorax. The patient underwent erector spinae plane blockage with a catheter located at T5 guided by ultrasound with a 17G Tuohy needle and injection of 20mL of 0.5% ropivacaine providing important decrease and improvement of pulmonary expansibility. CONCLUSION: Erector spinae plane blockage provided adequate analgesia and was considered a good therapeutic option.

RESUMO JUSTIFICATIVA E OBJETIVOS: A persistência da dor na região torácica no pós-operatório é muito comum com analgesia convencional realizada apenas com opioides, o que prolonga a recuperação, aumentando os gastos e a morbidade. O bloqueio do plano eretor da espinha é uma técnica promissora no controle analgésico no pós-operatório das cirurgias cardíacas. O objetivo deste estudo foi descrever um caso em que o bloqueio do plano eretor da espinha propiciou adequado controle analgésico pós-operatório. RELATO DO CASO: Paciente do sexo masculino, 61 anos, submetido à cirurgia cardíaca eletiva de aneurismectomia do ventrículo esquerdo e revascularização do miocárdio. No primeiro dia de pós-operatório apresentou dor de intensidade 8 pela escala analógica visual em hemitórax esquerdo. Foi submetido ao bloqueio do plano eretor da espinha com cateter locado em T5 guiado por ultrassom com agulha Tuohy 17G e injeção de 20mL de ropivacaína a 0,5%, propiciando importante diminuição e melhora da expansibilidade pulmonar. CONCLUSÃO: O bloqueio do plano eretor da espinha promoveu analgesia adequada, sendo considerado como uma boa opção terapêutica.

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Abstract Introduction: A large number of people around the world struggle daily to become free of their addiction to illegal psychoactive substances. In order to create an atmosphere of improved supervision, established communication and improved quality of life for drug addicts, centers have been set up to provide methadone as a substitute. Objective: The aim of the research was to assess the vocal features of drug addicts on methadone therapy via subjective and objective parameters, to ascertain if vocal damage has occurred and to determine whether subjective and objective acoustic vocal parameters are related, and how. Methods: The research included 34 adults of both genders who were undergoing methadone treatment. A subjective vocal evaluation assessed voice pitch and clarity, while the subjective acoustic analysis utilized the Roughness-Breathiness-Hoarseness scale of roughness-breathiness-hoarseness. Objective acoustic analysis was conducted after recording and analyzing an uninterrupted vocal /a/ of at least three seconds duration, using the "GllotisController" software. Results: The subjective acoustic analysis using the Roughness-Breathiness-Hoarseness scale showed pathological values in 52.9% male and 47% female participants. The average values of the roughness-breathiness-hoarseness for the entire sample were 0.91, 0.38 and 0.50, respectively. Lower roughness was associated with a higher fundamental frequency (f0) and lower jitter and shimmer values (p < 0.05). There was a statistically significant correlation between breathiness, jitter (p < 0.01) and shimmer (p < 0.05), and between hoarseness and jitter (p < 0.01). Conclusion: A statistically significant correlation was found between the two subjective vocal assessments, voice clarity and pitch, and Roughness-Breathiness-Hoarseness scale, and the parameters of the objective acoustic vocal assessment.

Resumo Introdução: Um grande número de pessoas em todo o mundo luta diariamente para livrar-se de seu vício em substâncias psicoativas ilegais. Com o objetivo de criar uma atmosfera de supervisão melhorada, comunicação estabelecida e melhora da qualidade de vida para drogaditos, foram criados centros que fornecem a substância substitutiva metadona. Objetivo: Avaliar a voz de drogaditos que recebem terapia com metadona através de parâmetros subjetivos e objetivos, para determinar o eventual dano à voz, bem como determinar se os parâmetros vocais acústicos subjetivos e objetivos estão interligados e como isso ocorre. Método: A pesquisa incluiu 34 participantes, usuários de terapia com metadona, de ambos os sexos. A avaliação vocal subjetiva consistiu na avaliação do tom (pitch) e clareza da voz, enquanto a análise acústica subjetiva consistiu no uso da escala RSA, de rugosidade, soprosidade e aspereza. A análise acústica objetiva foi realizada após a gravação e análise da vocalização ininterrupta de /a/ com duração de no mínimo três segundos, com o software GllotisController. Resultados: A análise acústica subjetiva utilizando a escala RSA mostrou valores patológicos em 52,9% de homens e 47% em mulheres. Os valores médios dos parâmetros rugosidade, soprosidade e aspereza para toda a amostra foram 0,91, 0,38 e 0,50, respectivamente. O parâmetro rugosidade mais baixo esteve associado a valores mais altos de frequência fundamental (f0) e menor jitter e o shimmer (p < 0,05). Entre o parâmetro soprosidade e o jitter (p < 0,01) e o shimmer (p < 0,05) houve uma correlação estatisticamente significante, bem como entre o parâmetro aspereza e o jitter (p < 0,01). Conclusão: Foi encontrada uma correlação estatisticamente significante entre a avaliação vocal subjetiva da clareza e do tom (pitch) da voz e os parâmetros da avaliação vocal acústica objetiva, bem como os parâmetros da análise vocal acústica subjetiva utilizando a escala de rugosidade, soprosidade e aspereza e os parâmetros acústicos objetivos.

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INTRODUCTION: A large number of people around the world struggle daily to become free of their addiction to illegal psychoactive substances. In order to create an atmosphere of improved supervision, established communication and improved quality of life for drug addicts, centers have been set up to provide methadone as a substitute. OBJECTIVE: The aim of the research was to assess the vocal features of drug addicts on methadone therapy via subjective and objective parameters, to ascertain if vocal damage has occurred and to determine whether subjective and objective acoustic vocal parameters are related, and how. METHODS: The research included 34 adults of both genders who were undergoing methadone treatment. A subjective vocal evaluation assessed voice pitch and clarity, while the subjective acoustic analysis utilized the Roughness-Breathiness-Hoarseness scale of roughness-breathiness-hoarseness. Objective acoustic analysis was conducted after recording and analyzing an uninterrupted vocal /a/ of at least three seconds duration, using the "GllotisController" software. RESULTS: The subjective acoustic analysis using the Roughness-Breathiness-Hoarseness scale showed pathological values in 52.9% male and 47% female participants. The average values of the roughness-breathiness-hoarseness for the entire sample were 0.91, 0.38 and 0.50, respectively. Lower roughness was associated with a higher fundamental frequency (f0) and lower jitter and shimmer values (p<0.05). There was a statistically significant correlation between breathiness, jitter (p<0.01) and shimmer (p<0.05), and between hoarseness and jitter (p<0.01). CONCLUSION: A statistically significant correlation was found between the two subjective vocal assessments, voice clarity and pitch, and Roughness-Breathiness-Hoarseness scale, and the parameters of the objective acoustic vocal assessment.

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PURPOSE: This study aimed to determine the current attitudes, perceptions, and practices of emergency medicine providers and nurses (RNs) regarding the discharge of adult patients from the emergency department (ED) after administration of opioid analgesics. METHODS: A cross-sectional survey was administered at 3 hospital sites with a combined annual ED census of >180,000 visits per year. All 59 attending emergency physicians (EPs), 233 RNs, and 23 advanced practice clinicians (APCs) who worked at these sites were eligible to participate. FINDINGS: Thirty-five EPs (59.3%), 88 RNs (37.8%), and 14 APCs (60.9%) completed the survey for an overall response rate of 51.75%. Most respondents were female (95 [69.9%]). The factor ranked most important to consider when discharging a patient from the ED after administration of opioids was the patient's functional status and vital signs (median, 2.00; interquartile range, 2.00-3.50). More RNs (84 [96.6%]) than EPs (29 [82.9%]) reported that developing an ED policy or guideline for safe discharge after administration of opioids is important to clinical practice (P = 0.02). Only 8 physicians (23.5%) reported that they did not prescribe intramuscular morphine, and 15 (42.9%) reported that they did not prescribe intramuscular hydromorphone. EPs (7 [20.0%]) and RNs (3 [3.4%]) differed in regard to whether they were aware if any patients to whom they administered an opioid had experienced an adverse drug-related event (P = 0.01). Most EPs (24 [68.6%]) and RNs (54 [61.4%]) believed that the decision for patient discharge should be left to both the emergency medicine provider and the RN. IMPLICATIONS: Most study participants believed that developing a policy or guideline for safe discharge after administration opioids in the ED is important to clinical practice. Only a few physicians reported that they did not prescribe intramuscular hydromorphone or morphine. Most participants believed the discharge decision after administration of opioids in the ED should be primarily determined by both the emergency medicine provider and the RN.

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Resumen Los opioides son medicamentos fundamentales para mitigar el sufrimiento y mejorarla calidad de vida a través del control del dolor en pacientes con patología oncológica. Objetivo: Determinar la prevalencia de periodo de consumo de medicamentos tipo opioides y describir las características de su prescripción en pacientes hospitalizados en un centro oncológico durante el 2013. Materiales y métodos: Estudio descriptivo de corte transversal para determinar la prevalencia y las características de consumo de medicamentos opioides en 1.231 pacientes con diagnóstico confirmado de cáncer sólido o hematológico, de ambos sexos y cualquier edad, que recibieron por lo menos una dosis de cualquier tipo de opiode. Resultados: La prevalencia del consumo de opioides fue de 61,4%, siendo más frecuente en mujeres (56,6%) que en hombres (43,3%), la mediana de dosis suministrada en estadios tempra nos fue de 15 mg de morfina oral/día con un rango de 5 a 600 mg; y en estadios tardíos de 20 mg de morfina oral/día (rango 1,25 a 1.050 mg). La indicación más común para la prescripción de opioides fue el dolor agudo con un 51,1%, entendiéndose por dolor agudo aquel producido por una lesión aguda (fractura, cefalea o postoperatorio), seguida de dolor crónico con un 43,7% y en menor proporción disnea de origen tumoral (3,5%). El principal opioide utilizado para dolor agudo fue tramadol (82,9%), seguido de morfina (16,4%). Conclusión: Los resultados sugieren una asociación al mayor consumo de medicamentos opioides en estadios tardíos de enfermedad oncológica, sin embargo, se requieren más estudios para establecer este hallazgo, por otra parte, se detectaron algunos problemas de prescripción en pacientes con enfermedad renal y una baja prescripción en población pediátrica en especial en menores de siete años donde es claro que la evaluación y diagnóstico de dolor es más difícil. © 2018 Instituto Nacional de Cancerología. Publicado por Elsevier España, S.L.U. Todos los derechos reservados.

Abstract Opioids are critical for pain management in oncology patients. This group of patients requires management with these drugs to mitigate suffering and to improve quality of life. Objective: To determine the prevalence of the use of opioid-type drugs and to describe the characteristics of their prescription in hospitalised patients in a cancer centre during the year 2013. Materials and methods: A cross-sectional descriptive study was conducted to determine the prevalence and characteristics of opioid drug use. The study included 1231 patients with con firmed diagnosis of cancer, a solid haematological tumour, of both genders, and of any age, who received at least one dose of any type of opiate. Results: The prevalence of opioid consumption was 61.4%, with it being more frequent in women (56.6%) than in men (43.3%). The median dose given in early stages was 15 mg oral morphine / day with a range of 5 to 600 mg. In the late stages oral morphine 20 mg / day (range of 1.25 to 1050 mg) was used. The most common indication for opioid prescription was acute pain in 51.1%, with acute pain being understood as pain produced by an acute fracture, headache, or post-operative). This was followed by chronic pain, with 43.7%, and to a lesser extent for dyspnoea of tumour origin (3.5%). The main opioid used for acute pain was tramadol (82.9%), followed by morphine (16.4%). Conclusion: The results suggest a greater association with the consumption of opioids in the late stages of oncological disease, although more studies are needed to establish this finding. On the other hand, some prescription problems are detected in patients with renal disease and low prescription in the paediatric population. This is mainly noted in children less than 7 years-old, where it is obvious that the evaluation and diagnosis of pain is more difficult.

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A nivel mundial la dependencia a opiáceos es un problema vigente, y los pacientes afectados por esta condición requieren programas de tratamiento sustitutivo farmacológico, que utilizan tradicionalmente Metadona. Actualmente, existe debate sobre el hecho de que la Buprenorfina/Naloxona podria ser utilizada como un reemplazo adecuado del fármaco tradicional. Las investigaciones aún no son totalmente concluyentes, faltando estudios que prueben los resultados en la práctica clínica. Objetivos: Determinar la efectividad del tratamiento con Buprenorfina/Naloxona como reemplazo de la metadona en pacientes dependientes de opiáceos tratados en un Módulo de Asistencia Psicosocial en la ciudad de Bilbao, España. Métodos: Se realizó un estudio cuasiexperimental, cuantitativo, longitudinal, prospectivo, con 21 pacientes dependientes de opiáceos que formaban parte del Programa de mantenimiento con Metadona con dosis inferiores o iguales a 40 mg/día, en quienes se sustituyó ese tratamiento por el de Buprenorfina/Naloxona (8mg/2mg) siguiendo para esto los criterios de la Guía para el tratamiento de la adicción a opiáceos con Buprenorfina/Naloxona de la Sociedad Científica Española de estudios sobre alcohol, el alcoholismo y otras toxicomanías del 2010. Resultados: Después de tres meses de cambio de terapéutica a Buprenorfina/Naloxona se evidencio una reducción estadísticamente significativa en el consumo de opiáceos ilegales, medido a través de los controles de substancias en orina desde un promedio de 2,67 controles positivos con metadona, a 2,24 controles con Buprenorfina/Naloxona. La adherencia, se mantuvo similar a la previa, presentando además una retención del 100% de los pacientes. La calidad de vida, medida con el Test TECVASP, presento una mejora estadísticamente significativa, desde una puntuación de 76,76 cuando recibían Metadona (DE 6,41) hasta 90,33 (DE 5,77 ) con la nueva terapéutica. Conclusiones: Cambiar la terapia de mantenimiento con Metadona, en pacientes dependientes de opioides, por buprenorfina/naloxona es una buena opción, ya que tiene una efectividad similar en términos de adherencia y retención, y produce una mayor reducción en el uso de opiáceos ilegales, al tiempo que mejora la calidad de vida del paciente.

At the global level, opioid dependence is an ongoing problem, and patients with this condition require pharmacological substitution treatment programs, which traditionally use methadone. Currently there is debate over whether Buprenorphine / Naloxone could be used as a suitable replacement for the traditional drug. The investigations are not yet totally conclusive, lacking studies that prove the results in the clinical practice. Objectives: To determine the effectiveness of treatment with Buprenorphine / Naloxone as a replacement for Methadone in opioid dependent patients treated in a Psychosocial Assistance Module in the city of Bilbao, Spain. Methods: A quasi-experimental, quantitative, longitudinal, prospective study was conducted with 21 opioid-dependent patients that were part of the maintenance program with Methadone at doses lower than or equal to 40 mg / day, in which treatment was replaced by that of Buprenorphine / Naloxone (8 mg/2 mg) following for this the criteria of the Guide for the treatment of the addiction to opiates with Buprenorphine / Naloxone of the Spanish Scientific Society of studies on alcohol, alcoholism and other drug addictions of 2010. Results: After a three-month change in therapy to Buprenorphine / Naloxone, a statistically significant reduction in illegal opioid use was observed, measured through urine substance controls from an average of 2.67 methadone-positive controls 2.24 controls with Buprenorphine / Naloxone. The Adherence remained similar to the previous one, presenting a retention of 100% of the patients. Quality of life, measured with the TECVASP test, showed a statistically significant improvement, from a score of 76.76 when receiving Methadone (DE 6.41) to 90.33 (DE 5.77) with the new therapy. Conclusions: Changing maintenance therapy with methadone, in opioid-dependent patients, by buprenorphine/naloxone is a good option, because it has a similar effectiveness in terms of adherence and retention, and produces a greater reduction in the use of illegal opiates, and the same time improves the quality of life of the patient.

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El sistema opioide, del cual forman parte los peptidos opioides endogenos y sus receptores (Miu, Kappa, delta y ORL), tiene un papel importante en la fisiologia de diferentes sistemas. Existe una creciente evidencia de su participacion en la fisiopatologia de multiples trastornos del sistema nervioso central, endocrino e inmunologico. La modulacion del sistema opioide mediante el uso de antagonistas especificos o inespecificos de sus receptores puede tener un papel terapeutico en el manejo sintomatico de diferentes contextos, incluyendo la intoxicacion aguda por opiaceos, la dependencia a opioides, y la reduccion de reacciones adversas de agonistas opioides utilizados en el manejo del dolor cronico. El presente trabajo tiene como objetivo revisar la farmacologia de los antagonistas opioides especificos e inespecificos, y realizar una actualizacion de sus posibles nuevas indicaciones y usos terapeuticos.

Opioid system, which involved endogenous opioid peptides and their receptors (Miu, Kappa, delta and ORL), has a main role in the physiology of several systems. At the same time, there is cumulating evidence in the role of the opioid system in the physiopathology of several disorders in the central nervous, endocrine and immunological system. The modulation of the opioid system using nonspecific antagonists may have a therapeutic role in the symptomatic management of several diseases, as well as, in the emergency management of opioid analgesic overdose, opioid dependence and to reduce the drug side effects of the opioid agonists used in chronic pain. This paper aims to review the pharmacology of specific and nonspecific opioid antagonists, and update on possible new indications and therapeutic uses of such antagonists.

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UNLABELLED: Immunosuppressive morphine actions are well characterized, but other opiates are less studied. The objectives of this work were: (a) to compare the acute effects of morphine and fentanyl to inhibit early peritoneal LPS-induced TNFα release; (b) to find if, as in the case of morphine, intraperitoneal mast cells (MCs) are the target of fentanyl's immunosuppressive actions; and (c) to analyze if repeated opiate administration induces tolerance to opiate immunosuppressive effects. Independent groups of mice received a single i.p. injection of morphine (0.1-10mg/kg) or fentanyl (0.001-0.1mg/kg) 10min prior to LPS (1mg/kg). Peritoneal TNFα levels were determined 1h later. The effects of fentanyl were analyzed in MC-deficient mice (W-sh) and in W-sh mice reconstituted with bone marrow-derived MCs. Other animals received 6 or 10 doses of morphine (10mg/kg, 3×/day) or fentanyl (0.1mg/kg 3×/day) and were then challenged with LPS. Fentanyl was equally effective and 1000× more potent than morphine to inhibit i.p. LPS-induced TNFα release and this was dependent on intraperitoneal MCs. Repeated morphine administration induced tolerance to both antinociception and inhibition of response to endotoxin. Repeated fentanyl injection did not induce significant antinociceptive tolerance, but, interestingly, produced sensitization to LPS. IN CONCLUSION: (1) opiates with different analgesic potency also differ in their potency to induce immunosuppression; (2) MCs are the cellular target of the immunosuppressive actions of fentanyl here studied; (3) in contrast with morphine, tolerance to fentanyl's immunosuppressive actions can be dissociated from tolerance to its antinociceptive effects.

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It is well established that morphine inhibits maternal behaviors. Previous studies by our group have shown activation of the rostrolateral periaqueductal gray (rlPAG) upon inhibition-intended subcutaneous injections of morphine. In this context, we demonstrated that a single naloxone infusion into the rlPAG, following this opioid-induced inhibition, reactivated maternal behaviors. Since these data were obtained by using peripheral morphine injections, the present study was designed to test whether morphine injected directly into the rlPAG would affect maternal behaviors. Our hypothesis that morphine acting through the rlPAG would disrupt maternal behaviors was confirmed with a local infusion of morphine. The mothers showed shorter latency for locomotor behavior to explore the home cage (P = 0.049). Inhibition was especially evident regarding retrieving (P = 0.002), nest building (P = 0.05) and full maternal behavior (P = 0.023). These results support the view that opioidergic transmission plays a behaviorally meaningful inhibitory role in the rostrolateral PAG.

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Introducción: En Colombia, la prevalencia de los problemas relacionados con la dependencia a la heroína ha ido en aumento desde los años noventa. Método: Luego de contextualizar este problema, el artículo se centra en los hallazgos científicos, las indicaciones y limitaciones farmacoterapéuticas de la gama de medicamentos existentes para el manejo agudo del síndrome de abstinencia, conocido comúnmente como la desintoxicación. Resultados: Las opciones farmacológicas disponibles incluyen agonistas opioides, agonistas opiáceos parciales, los antagonistas opioides y agonistas alfa-2 adrenérgicos. Conclusión: Aunque el tratamiento integral de la dependencia de heroína incluye intervenciones psicoterapéuticas, esta revisión señala que el enfoque, tal vez, más exitoso para controlar el síndrome agudo de abstinencia de la suspensión abrupta de la heroína es la sustitución con metadona o buprenorfina seguido por una reducción gradual de las dosis, al tiempo que se promueven cambios de estilos de vida duraderos y la prevención de recaídas...

Introduction: In Colombia, the prevalence of problems associated with heroin dependence has increased since the nineties. Method: After contextualize this issue, the article focuses on the scientific findings, indications, and pharmacotherapeutic limitations of the range of existing medications to treat acute withdrawal syndrome, commonly known as detoxification. Results: The pharmacological options available include opioid agonists, opioid partial agonists, antagonists and alpha-2 adrenergic agonists. Conclusion: Although the comprehensive treatment of heroin dependence include psychotherapeutic interventions, this review indicates that the approach, perhaps more successful in controlling acute withdrawal syndrome after abrupt discontinuation of heroin is methadone or buprenorphine followed by a gradual reduction in dose, while promoting lifestyle changes sustainable and relapse prevention...

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Objetivos: analizar el uso de opiáceos durante el embarazo, las implicaciones metabólicas y las posibles consecuencias que esta conducta adictiva puede ocasionar sobre la madre y el feto, así como estudiar los efectos del tratamiento para la adicción a los opiáceos en mujeres embarazadas. Metodología: se analizó toda la literatura disponible de los últimos 40 años en la base de datos PubMed, al igual que artículos históricos, textos y referencias citadas en trabajos públicos. Resultados: se obtuvo información pertinente relacionada con los objetivos propuestos en la presente revisión, por lo cual ésta se puede clasificar en 5 secciones: uso de opiáceos durante el embarazo, mecanismos de acción, consecuencias del uso de opiáceos en el embarazo, tratamiento de la adicción a los opiáceos en mujeres embarazadas y efectos sobre el recién nacido. Conclusión: el consumo de opiáceos durante el embarazo constituye un factor de riesgo para la madre y el niño relacionado con las posibles complicaciones durante la gestación y con la presencia de síndromes de abstinencia y muerte súbita neonatal. Ante esto, los tratamientos con metadona y buprenorfina disminuyen el riesgo; no obstante, deben controlarse rigurosamente con el fin de evitar posibles problemas relacionados con su uso.

Introduction: pregnant females consuming drugs of abuse is becoming a serious problem for pregnant women and for their babies as this habit increases the risk of complications during pregnancy and may permanently harm the infant (directly or indirectly). The present review was aimed at analysing opiate use during pregnancy, its mechanism of action, the metabolic implications and the possible consequences to this addictive behaviour for the mother and baby. It also analysed the effects of the opiate addiction treatment on pregnant women. Methodology: information from the last 40 years included in the PubMed database as well as historicalarticles, texts and references cited in work published to date were analysed. Results: important information related to the objectives proposed in the present review was found and analysed. It was then divided into four sections as follows: opiate use during pregnancy, mechanisms of action, consequences of using opiates during pregnancy and the effects on the newborn. Conclusions: opiates consumed during pregnancy represent a risk factor for both the mother and baby and are related to possible complications during pregnancy and the presentation of neonatal abstinence syndrome and sudden infant death. Treatment using methadone and/or buprenorphine reduces such risk but rigorous control must be imposed to avoid possible problems related to their use.

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The positive reinforcing properties of addictive drugs have a primary role in the development of drug dependence. In the field of opiates, great attention has been given to this phenomenon, as well as to the negative properties eliciting craving and inducing relapse during withdrawal. This study was designed to evaluate whether elevated plus-maze (EPM) experienced rats withdrawn from low doses of subcutaneous (s.c.) morphine (10 mg/kg), in which a high anxiety level is the most prominent withdrawal symptom, acquire place preference when submitted to a conflict paradigm in which drug effects are paired with an aversive context: the distal part of the open arms of an EPM. Both the anxiety test and place preference conditioning were measured in the same apparatus, a biased version of the plus-maze. In order to verify the influence of previous EPM spatial learning on the performance of morphine-withdrawn rats, half the animals in this study experienced the EPM prior to treatment. Additional groups were also tested under the influence of morphine effects. The effects of the treatments were quantified through the analysis of three types of measures: anxiety was inferred from the use of the conventional measures (percentage of entries and time spent in the open-arms) and risk-assessment behaviours (frequency of stretched-attending postures - SAP, and time spent at the centre of the maze). Place preference conditioning was evaluated through analysis of the number of entries, total time spent and distance run in the open-arm extremities, which is where the animals were conditioned. The number of closed-arm entries was taken as an index of locomotor activity. Our results showed that (i) EPM naïve rats pre-treated with morphine did not develop place preference, behaving like control rats; (ii) rats that had previous experience in the EPM showed no changes in open-arm avoidance on the second exposure, when compared with rats naïve for this condition; (iii) previous spatial learning of the EPM contextual cues was, in fact, a requirement for anxiety-inducing place preference for the open-arms in morphine-withdrawn rats and, (iiii) conditioned place preference was achieved both in rats under the effects of morphine and in withdrawal, probably through the influence of the positive or negative reinforcing effects promoted by the presence or absence of the drug in the central nervous system.

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Con el propósito de conocer, en la población que concurre al laboratorio del CENATOXA, qué droga de abuso se consume más, cuál es la modalidad de consumo y el perfil de la consulta, se realizó un estudio retrospectivo de 2.635 casos a los que durante el período 1995-2006 se les solicitó investigación en orina de cannabis, cocaína y opiáceos. Los análisis se realizaron utilizando pruebas inmunológicas, cromatografía en capa delgada normalizada y cromatografía gaseosa-espectrometría de masas. El 20% de las muestras (n=529) resultaron positivas, correspondiendo el 50,66% a cannabis, el 37,43% a cocaína, el 2,08% a opiáceos y el 9,83% a la combinación cannabis-cocaína. Los varones constituyeron el 62% de los casos positivos. El mayor consumo de cannabis se observó entre los 11 y 30 años, el de cocaína entre los 21 y 40 años y la combinación de ambas drogas entre los 11 y 30 años. Los motivos de la solicitud de análisis correspondieron mayoritariamente y en proporciones similares al control de la adicción (31,1%) y a la sospecha de consumo (29,67%). El cannabis fue la droga ilegal más usada, predominó el monoconsumo, los principales usuarios fueron varones y los más comprometidos fueron los menores de 30 años.

A study was conducted in order to know what drugs of abuse are most commonly consumed by the population that comes to CENATOXA, as well as which the consumption patterns and consultation profiles are. A retrospective study was conducted in 2,635 cases for which, during 1995 to 2006, a toxicologycal urine analysis of cocaine, cannabis and opiates was requested. The analytical methodologies applied were immunoassay tests, standardized thin layer chromatography and gas chromatography-mass spectrometry. In the studied sample (n=529), 20% were positive: 50.66% was due to cannabis, 37.43% to cocaine, 2.08% to opiates and 9.83% to combination of cannabis-cocaine. Sixty-two per cent of positive cases were male subjects, and the highest consumption of cannabis was seen in the 11 to 30 year-old age group; that of cocaine was seen in the 21 to 40 year-old age group and the combination of cannabis-cocaine in the 11 to 30 year-old group. In assessing the reason for test request a similar predominance of addiction control (31.1%) and drug abuse suspicion (29.67%) was found. Cannabis is the drug of abuse most commonly consumed; mono consumption is usual in this population and drug consumption is higher in males and people under 30 years old.

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