Avaliação da incidência de uso de antidepressivos em estudantes de medicina do estado de Alagoas / Evaluation of the incidence of antidepressant use among medical students in the state of Alagoas

O presente estudo objetivou determinar a frequência do uso de antidepressivos entre os estudantes de Medicina do Estado de Alagoas, dessa forma, consiste em um estudo prospectivo e transversal, realizado nas instituições de ensino superior do Estado de Alagoas possuidoras da graduação de Medicina. Critérios de inclusão foram estar matriculado e frequentando o curso, cursando do primeiro ao quarto ano e possuir 18 anos ou mais. Já os critérios de exclusão foram ser do quinto ou sexto ano de graduação; possuir idade menor que 18 anos, mesmo que emancipado. Através de questionário autopreenchido (informações sociodemográficas, estilo de vida e inventário de Ansiedade de Beck), foram entrevistados 342 acadêmicos de forma aleatória. Os dados adquiridos foram digitados, tabulados e analisados. Este estudo teve aprovação do Comitê de Ética em Pesquisa. Todos os participantes leram e assinaram o Termo de Consentimento Livre e Esclarecido em conformidade aos critérios da resolução 466/12. Dos entrevistados, 15% recorrem a antidepressivo e 85% não fazem uso desse tipo de fármaco. Mesmo dando uma percentagem baixa, ainda é preocupante e bastante importante abordar sempre esse tema e reformular o ensino médico, de modo a diminuir os níveis de estresse e ansiedade dos estudantes (AU).

This study aimed to determine the frequency of antidepressant use among medical students in the State of Alagoas, thus consisting of a prospective and cross-sectional study carried out in higher education institutions in the State of Alagoas that offer undergraduate medical education. Inclusion criteria were being enrolled and attending the course, from the first to the fourth year, and being 18 years old or older. The exclusion criteria were being in the fifth or sixth year of medical school; being younger than 18 years old, even if emancipated. Through a self-completed questionnaire (sociodemographic information, lifestyle, and Beck's Anxiety Inventory), 342 students were randomly interviewed. The data were typed, tabulated and analyzed. This study was approved by the Research Ethics Committee. All participants who participated read and signed the Informed Consent Form according to the criteria of resolution 466/12. Fifteen percent of the respondents use antidepressants and 85% do not use this type of drug. Even giving a low percentage, it is still worrisome and quite important to always address this issue and reformulate medical education in order to decrease the levels of stress and anxiety among students (AU).

Behavioral characterization of ayahuasca treatment on Wistar rats in the open field test

Abstract Ayahuasca (AYA) is a psychedelic beverage with therapeutic potential for many mood and anxiety disorders. Although there are some preclinical studies, no published reports have tested the behavioral effects of AYA gavage in animal models. This investigation aimed to characterize the behavior of Wistar rats after acute ingestion of AYA for 40 min in the open field test (OFT). The sample consisted of three experimental groups treated with different dosages of AYA (125, 250, or 500 mg kg-1) and a control group. Each group consisted of 10 participants. After gavage, the number of crossings of the OFT grid lines, latency to enter the central area of the device, grooming frequency, and time spent in the central perimeter of the device were immediately evaluated. Analyses were based on one-way ANOVA and a linear-regression mixture model for longitudinal data. AYA intake did not interfere with habituation. The 500 mg kg-1 group showed a decrease in the time spent in the center of the device and in the number of crossings compared to the control group in the last 10 min. These results suggest that gavage with AYA did not interfere with the results, and the behavioral effects were perceived only between 30 and 40 min after gavage. Taken together, the results indicate that three aspects should be considered in OFT studies of AYA acute effects: the moment when the observation starts, the observation period, and the AYA dosage.

Idosos atendidos em um serviço de urgência e emergência psiquiátrica / Elderly people served in a psychiatric emergency and urgency service / Asistencia de personas de edad avanzada en un servicio psiquiátrico de emergencia

OBJETIVO: caracterizar os idosos atendidos em um Serviço de Urgência e Emergência Psiquiátrica quanto ao perfil sociodemográfico, diagnóstico psiquiátrico, prescrição de medicamentos e conduta médica e avaliar suas associações com o sexo. MÉTODO: estudo transversal, quantitativo, em que os dados foram obtidos a partir dos prontuários de pacientes atendidos no referido serviço, entre julho/2015 e junho/2016. A variável independente foi o sexo e as dependentes foram: idade; procedência; informante; tratamento psiquiátrico anterior; diagnóstico; medicamentos prescritos e conduta. RESULTADOS: nos 152 prontuários analisados, observam-se idade prevalente entre 60 a 69 anos, maioria de mulheres, procedência do município local e comparecimento com acompanhante. Os diagnósticos prevalentes são a esquizofrenia e os transtornos mentais e comportamentais decorrentes do uso de substâncias psicoativas. As medicações prescritas com maior frequência são da classe dos antipsicóticos e anti-histamínicos, seguidas dos ansiolíticos/sedativos. O critério de Beers considera a prescrição de medicamentos do grupo dos benzodiazepínicos, antipsicóticos e anti-histamínicos inapropriada para idosos. A principal conduta foi a alta, sem encaminhamento a outro serviço. CONCLUSÃO: embora haja incentivo do Ministério da Saúde, com a criação de novas políticas de saúde mental, muitos profissionais mantêm o modelo de atendimento baseado na queixa e conduta, dificultando a reabilitação psicossocial dos pacientes.

OBJECTIVE: characterize the elderly treated in a Psychiatric Emergency and Urgency Service regarding their sociodemographic profile, psychiatric diagnosis, prescription of medication and medical conduct and evaluate their associations with sex. METHOD: a cross-sectional, quantitative study in which data was obtained from the medical records of patients seen in the referred service, between July/2015 and June/2016. The independent variable was gender and dependents were: age; origin; informant; previous psychiatric treatment; diagnosis; prescribed drugs and conduct. RESULTS: in the 152 medical records analyzed, the prevailing age is between 60 and 69 years old, most of them women, coming from the local municipality and attending with a companion. The prevalent diagnoses are schizophrenia and mental and behavioral disorders resulting from the use of psychoactive substances. The most frequently prescribed medications are in the class of antipsychotics and antihistamines, followed by anxiolytics/sedatives. Beers' criteria consider the prescription of benzodiazepine, antipsychotic and antihistamine medications inappropriate for the elderly. The main conduct was discharge, without referral to another service. CONCLUSION: although there is encouragement from the Ministry of Health, with the creation of new mental health policies, many professionals maintain the model of care based on complaint and conduct, hindering the psychosocial rehabilitation of patients.

OBJETIVO: caracterizar a los ancianos atendidos en un servicio psiquiátrico de emergencia y urgencia en relación con el perfil sociodemográfico, el diagnóstico psiquiátrico, la prescripción de medicamentos y la conducta médica; y evaluar sus asociaciones con el sexo. MÉTODO: un estudio cuantitativo y transversal en el que se obtuvieron datos de los registros médicos de los pacientes tratados en el citado servicio, del 2015 al 2016 de julio. La variable independiente era el sexo y los dependientes eran: edad, procedencia, informante, tratamiento psiquiátrico previo, diagnóstico, medicamentos recetados y conducta. RESULTADOS: de los 152 registros médicos analizados, se observa que: la edad predominante es de 60 a 69 años, la mayoría de ellos son mujeres, desde el municipio local y atendido a la atención de un acompañante. Los diagnósticos prevalentes son la esquizofrenia y los trastornos mentales y conductuales resultantes del uso de sustancias psicoactivas. Los medicamentos recetados con mayor frecuencia son la clase antipsicótica y anti-histamina, seguida de ansiolíticos/sedantes. El criterio de Beers considera que la prescripción de fármacos del grupo de benzodiazepinas, antipsicóticos y antihistaminas, es inadecuada para los ancianos. La conducta principal era alta, sin remisión a otro servicio. CONCLUSIÓN: aunque hay aliento del Ministerio de salud con la creación de nuevas políticas de salud mental, muchos profesionales mantienen el modelo de cuidado basado en la queja y la conducta, obstaculizando la rehabilitación psicosocial de los pacientes.

Assessment of sleep quality of patients with panic disorder and generalized anxiety disorder during remission: a case-control study

Abstract Background Sleep disorders are common in psychiatric diseases. Panic disorder (PD) and generalized anxiety disorder (GAD) are two major anxiety disorders that are associated with sleep disorders. Objective We hypothesized that poor sleep quality continues in PD and GAD during remission. Therefore, in this study we aimed to compare the sleep quality of patients with PD and GAD to that of healthy controls. Methods The study included patients with PD (n = 42) and GAD (n = 40) who had been in remission for at least 3 months and healthy control volunteers (n = 45). The patients were administered the Pittsburgh Sleep Quality Index (PSQI), Beck Anxiety Inventory (BAI), and Beck Depression Inventory (BDI). Results The total PSQI scores of the GAD group were significantly increased in comparison to those of the PD (p = 0.009) and control (p < 0.001) groups. The rate of poor sleep quality in GAD during remission (77.5%) was greater than that of the PD (47.6%) and control (51.1%) groups (p = 0.011). Discussion GAD is a chronic and recurrent disease. In this study, it was found that the deterioration in sleep quality of patients with GAD may continue during remission. In the follow-up and treatment of patients, it is appropriate to question about sleep symptoms and to plan interventions according to these symptoms.

Anxiolytic properties of compounds that counteract oxidative stress, neuroinflammation, and glutamatergic dysfunction: a review

Objective: Anxiety disorders are highly prevalent and the efficacy of the available anxiolytic drugs is less than desired. Adverse effects also compromise patient quality of life and adherence to treatment. Accumulating evidence shows that the pathophysiology of anxiety and related disorders is multifactorial, involving oxidative stress, neuroinflammation, and glutamatergic dysfunction. The aim of this review was to evaluate data from animal studies and clinical trials showing the anxiolytic effects of agents whose mechanisms of action target these multiple domains. Methods: The PubMed database was searched for multitarget agents that had been evaluated in animal models of anxiety, as well as randomized double-blind placebo-controlled clinical trials of anxiety and/or anxiety related disorders. Results: The main multitarget agents that have shown consistent anxiolytic effects in various animal models of anxiety, as well in clinical trials, are agomelatine, N-acetylcysteine (NAC), and omega-3 fatty acids. Data from clinical trials are preliminary at best, but reveal good safety profiles and tolerance to adverse effects. Conclusion: Agomelatine, NAC and omega-3 fatty acids show beneficial effects in clinical conditions where mainstream treatments are ineffective. These three multitarget agents are considered promising candidates for innovative, effective, and better-tolerated anxiolytics.

Dificuldades relacionadas à terapêutica medicamentosa no transtorno de ansiedade / Difficulties related to medication therapy for anxiety disorder

Este estudo objetivoucompreender as dificuldades de pessoas com transtorno de ansiedade referente ao seguimento da terapia medicamentosa. Trata-se deestudo transversal, descritivo com abordagem qualitativa, desenvolvido em 2012 com 32 pessoas atendidas em serviço ambulatorial no interior de São Paulo - Brasil. Os dados foram coletados por entrevista semiestruturada gravada e submetidos à análise de conteúdo temática. As dificuldades para o seguimento da farmacoterapia foram representadas pelas categorias: ͞Ter conhecimento insuficiente sobre o diagnóstico e tratamento medicamentoso͟, ͞Ficar insatisfeito(a) com os efeitos do tratamento͟, ͞Desejar mais do que uma prescrição͟, ͞Apresentar temores e preocupações relacionadas ao tratamento͟e ͞Identificar impedimentos para seguir a prescrição medicamentosa͟. Este estudo identificou aspectos, passíveis de intervenção, por meio de estratégias que focalizem a escuta, educação, autonomia e habilidades com vistas à segurança no uso dos medicamentos prescritos

This study aimed to comprehend difficulties of people with anxiety disorder referred to follow a medication therapy. This is a cross-sectional descriptive study with a qualitative approach, developed in 2012 with 32 people attended in an ambulatory service at the interior of São Paulo state ­ Brazil. The data was collected by semi-structured interview recorded and submitted to thematic content analysis. The difficulties to follow pharmacotherapy were represented by the categories: ͞To have insufficient knowledge about the diagnosis and medication therapy͟, ͞To be unsatisfied with the treatment effects͟, ͞To wish more than a prescription͟, ͞To present fears and worries related with the treatment͟ and ͞To identify impediments to follow the medication prescription͟. This study identified aspects subject to intervention, through interventions focused in listening, education, autonomy and abilitiesfor safety in the use of prescribed medications

I Brazilian Registry of Heart Failure - Clinical Aspects, Care Quality and Hospitalization Outcomes / I Registro Brasileiro de Insuficiência Cardíaca – Aspectos Clínicos, Qualidade Assistencial e Desfechos Hospitalares

Background: Heart failure (HF) is one of the leading causes of hospitalization in adults in Brazil. However, most of the available data is limited to unicenter registries. The BREATHE registry is the first to include a large sample of hospitalized patients with decompensated HF from different regions in Brazil. Objective: Describe the clinical characteristics, treatment and prognosis of hospitalized patients admitted with acute HF. Methods: Observational registry study with longitudinal follow-up. The eligibility criteria included patients older than 18 years with a definitive diagnosis of HF, admitted to public or private hospitals. Assessed outcomes included the causes of decompensation, use of medications, care quality indicators, hemodynamic profile and intrahospital events. Results: A total of 1,263 patients (64±16 years, 60% women) were included from 51 centers from different regions in Brazil. The most common comorbidities were hypertension (70.8%), dyslipidemia (36.7%) and diabetes (34%). Around 40% of the patients had normal left ventricular systolic function and most were admitted with a wet-warm clinical-hemodynamic profile. Vasodilators and intravenous inotropes were used in less than 15% of the studied cohort. Care quality indicators based on hospital discharge recommendations were reached in less than 65% of the patients. Intrahospital mortality affected 12.6% of all patients included. Conclusion: The BREATHE study demonstrated the high intrahospital mortality of patients admitted with acute HF in Brazil, in addition to the low rate of prescription of drugs based on evidence. .

Fundamento: A insuficiência cardíaca (IC) é uma das principais causas de hospitalização em adultos no Brasil, no entanto a maioria dos dados disponíveis é limitada a registros unicêntricos. O registro BREATHE é o primeiro a incluir uma ampla amostra de pacientes hospitalizados com IC descompensada de diferentes regiões do Brasil. Objetivo: Descrever as características clínicas, tratamento e prognóstico intra-hospitalar de pacientes admitidos com IC aguda. Métodos: Estudo observacional tipo registro, com seguimento longitudinal. Os critérios de elegibilidade incluíram pacientes acima de 18 anos com diagnóstico definitivo de IC, admitidos em hospitais públicos ou privados. Os desfechos avaliados incluíram causas de descompensação, uso de medicações, indicadores de qualidade assistencial, perfil hemodinâmico e eventos intra-hospitalares. Resultados: O total de 1.263 pacientes (64 ± 16 anos, 60% mulheres) foi incluído a partir de 51 centros de diferentes regiões do Brasil. As comorbidades mais comuns foram hipertensão arterial (70,8%), dislipidemia (36,7%) e diabetes (34%). Em torno de 40% dos pacientes apresentavam função sistólica do ventrículo esquerdo normal e a maioria foi admitida com perfil clínico-hemodinâmico quente-úmido. Vasodilatadores e inotrópicos endovenosos foram administrados a menos de 15% da amostra estudada. Indicadores de qualidade assistencial baseados nas orientações de alta hospitalar foram atingidos em menos de 65% dos pacientes. A mortalidade intra-hospitalar afetou 12,6% do total dos pacientes incluídos. Conclusão: O estudo BREATHE demonstrou a alta mortalidade intra-hospitalar dos pacientes admitidos com IC aguda no Brasil, somada à baixa taxa de prescrição de medicamentos baseados em evidências. .

Comparison of pharmacological and nonpharmacological treatment strategies in promotion of infertility self-efficacy scale in infertile women: a randomized controlled trial

The infertility is associated with psychological consequence including depression, and lack of self-efficacy. The aim of this study was to compare the pharmacological and no pharmacological strategies in promotion of self-efficacy of infertile women. A randomized controlled clinical trial was conducted on 89 infertile women who were recruited from Fatemeh Zahra Infertility and Reproductive Health Research Center and were randomized into three groups; cognitive behavioral therapy [CBT], antidepressant therapy with flouxetine 20 mg daily for 3 month, and a control group. All participants completed Infertility Self-efficacy Inventory [ISE] and the Beck Depression Inventory [BDI] at the beginning and end of the study. The means ISE scores among the CBT, fluoxetine, and control groups at the beginning and end of the study were 6.1 +/- 1.6 vs. 7.2 +/- 0.9, 6.4 +/- 1.4 vs. 6.9 +/- 1.3 and 6.1 +/- 1.1 vs. 5.9 +/- 1.4 respectively. Both CBT and fluoxetine increased the mean of ISE scores more than control group after intervention [p<0.0001, p=0.033; respectively], but increase in the CBT group was significantly greater than flouxetine group. Finally, there was evidence of high infertility self-efficacy for women exposed to the intervention compared with those in the control group. Also, there was an improvement in depression. Both fluoxetine and CBT decreased significantly the mean of BDI scores more than the control group; decrease in the CBT group was significantly more than that in the fluoxetine group. CBT can serve as an effective psychosocial intervention for promoting self-efficacy of infertile women

Wound-healing and benzodiazepines: does sleep play a role in this relationship?

Patients who have suffered burns frequently experience psychological consequences, among which anxiety disorders are prominent. Benzodiazepines are commonly administered to treat these symptoms. The effects of benzodiazepines on healing may not be direct but rather are modulated by alterations of the sleep architecture. This hypothesis is supported by studies that demonstrate the effects of benzodiazepines on the immune system and the inflammatory profile under both normal sleep conditions and during sleep deprivation, particularly rapid eye movement sleep deprivation.

Cannabidiol, a Cannabis sativa constituent, as an anxiolytic drug / Canabidiol, um componente da Cannabis sativa, como um ansiolítico

OBJECTIVES: To review and describe studies of the non-psychotomimetic constituent of Cannabis sativa, cannabidiol (CBD), as an anxiolytic drug and discuss its possible mechanisms of action. METHOD: The articles selected for the review were identified through searches in English, Portuguese, and Spanish in the electronic databases ISI Web of Knowledge, SciELO, PubMed, and PsycINFO, combining the search terms "cannabidiol and anxiolytic", "cannabidiol and anxiolytic-like", and "cannabidiol and anxiety". The reference lists of the publications included, review articles, and book chapters were handsearched for additional references. Experimental animal and human studies were included, with no time restraints. RESULTS: Studies using animal models of anxiety and involving healthy volunteers clearly suggest an anxiolytic-like effect of CBD. Moreover, CBD was shown to reduce anxiety in patients with social anxiety disorder. CONCLUSION: Future clinical trials involving patients with different anxiety disorders are warranted, especially of panic disorder, obsessive-compulsive disorder, social anxiety disorder, and post-traumatic stress disorders. The adequate therapeutic window of CBD and the precise mechanisms involved in its anxiolytic action remain to be determined.

OBJETIVOS: Revisar e descrever os estudos do constituinte não psicotomimético da Cannabis sativa, o canabidiol (CBD), como ansiolítico e discutir seus possíveis mecanismos de ação. MÉTODO: Os artigos selecionados para a presente revisão foram identificados por meio de busca eletrônica em inglês, português e espanhol nos bancos de dados ISI Web of Knowledge, SciELO, PubMed e PsycINFO e combinando os termos "canabidiol e ansiolíticos", "canabidiol e semelhante ao ansiolítico" e "canabidiol e ansiedade". Foram também revisadas as listas de referências dos artigos incluídos, de revisões da literatura e de capítulos de livro. Incluímos trabalhos experimentais em humanos e em animais, sem limite de tempo. RESULTADOS: Estudos com modelos animais de ansiedade e envolvendo voluntários saudáveis sugerem claramente que o CBD possui efeitos ansiolíticos. Além disso, o CBD mostrou-se capaz de reduzir a ansiedade em pacientes com transtorno de ansiedade social. CONCLUSÃO: Futuros ensaios clínicos com pacientes portadores de diferentes transtornos de ansiedade, em especial pacientes com transtorno do pânico, obsessivo-compulsivo, ansiedade social e estresse pós-traumático, são oportunos. Além disso, ainda é necessário determinar a adequada faixa terapêutica do CBD e os exatos mecanismos envolvidos nessa ação ansiolítica.

Diretrizes da Associação Médica Brasileira para o tratamento do transtorno de ansiedade social / Guidelines of the Brazilian Medical Association for the treatment of social anxiety disorder

INTRODUÇÃO: O transtorno de ansiedade social (TAS) é o transtorno de ansiedade mais comum, freqüentemente sem remissões, sendo comumente associado com importante prejuízo funcional e psicossocial. A Associação Médica Brasileira (AMB), através do "Projeto Diretrizes", busca desenvolver consensos de diagnóstico e tratamento para as doenças mais comuns. O objetivo deste trabalho é apresentar os achados mais relevantes das diretrizes relativas ao tratamento do TAS, servindo de referência para o médico generalista e especialista. MÉTODO: O método utilizado foi o proposto pela AMB. A busca foi realizada nas bases de dados do MEDLINE (PubMed), Scopus, Web of Science e Lilacs, entre 1980 e 2010. A estratégia utilizada baseou-se em perguntas estruturadas na forma P.I.C.O (acrônimo das iniciais "paciente ou população"; "intervenção, indicador ou exposição"; "controle ou comparação" e; "outcome ou desfecho"). RESULTADOS: Estudos evidenciam que o tratamento farmacológico de primeira linha para adultos e crianças são os inibidores seletivos de recaptação de serotonina e os inibidores de recaptação de serotonina e noradrenalina, enquanto que a terapia cognitivo-comportamental é apontada como melhor tratamento psicoterápico. Além disso, algumas comorbidades psiquiátricas foram associadas a uma pior evolução do TAS. CONCLUSÕES: Apesar da alta prevalência, o TAS acaba por não receber a devida atenção e tratamento. A melhor escolha para o tratamento de adultos é a associação psicoterapia cognitivo-comportamental com inibidores seletivos de recaptação de serotonina e os inibidores de recaptação de serotonina e noradrenalina. Outras opções como benzodiazepínicos ou inibidores da monoamino-oxidase devem ser usados como segunda e terceira opção respectivamente.

INTRODUCTION: Social anxiety disorder (SAD) is the most common anxiety disorder, usually with no remission, and is commonly associated with significant functional and psychosocial impairment. The Brazilian Medical Association (BMA), with the project named Diretrizes (Guidelines, in English), seeks to develop consensus for the diagnosis and treatment of common diseases. The aim of this article is to present the most important findings of the guidelines on the treatment of SAD, serving as a reference for the general practitioner and specialist. METHOD: The method used was proposed by the BMA. The search was conducted in the databases of MEDLINE (PubMed), Scopus, Web of Science and LILACS, between 1980 and 2010. The strategy used was based on structured questions as PICO (acronym formed by the initials of "patient or population", "intervention, display or exhibition", "control or comparison" and "outcome"). RESULTS: Studies show that the first-line pharmacological treatment for adults and children are serotonin selective reuptake inhibitors and serotonin and norepinephrine reuptake inhibitors, whereas cognitive-behavioral therapy is considered the best psychotherapeutic treatment. Moreover, some psychiatric comorbidities were associated with a worse outcome of SAD. CONCLUSIONS: Despite its high prevalence, SAD does not receive adequate attention and treatment. The best choice for the treatment of adults is a combination of cognitive-behavioral psychotherapy with serotonin selective reuptake inhibitors and serotonin and norepinephrine reuptake inhibitors. Other options as benzodiazepines or monoamine oxidase inhibitors must be used as second and third choices, respectively.

Evaluation of light/dark cycle in anxiety- and depressive-like behaviors after regular treatment with methylphenidate hydrochloride in rats of different ages / Avaliação do ciclo claro e escuro no comportamento relacionado à ansiedade e à depressão em ratos de diferentes idades após tratamento crônico com hidrocloridrato de metilfenidato

OBJECTIVE: Methylphenidate hydrochloride is the most widely used medication for treatment and management of attention-deficit hyperactivity disorder. However, the chronic effects of methylphenidate hydrochloride on anxiety- and depressive-like rat behaviors remain poorly investigated. In this context, the present study evaluated the effects of treatment with methylphenidate hydrochloride on anxiety- and depressive-like behaviors using young and adult rats during the light and the dark cycle. METHOD: Male Wistar rats (25 or 60 days old) received a once-daily (in either the light or dark cycle) methylphenidate hydrochloride (2mg/kg) or saline intraperitoneal injection for 28 days. We performed elevated plus maze and forced swimming test two hours after the last injection. RESULTS: The light/dark cycle was a significant factor in the anxiety-like behaviors; however, no significant interaction between all three factors (cycle, age and methylphenidate hydrochloride) was found. Nevertheless, we observed a nominally significant interaction between the light/ dark cycle and age in the forced swimming test. CONCLUSION: Our results have shown that age and the light/dark cycle are more significant modulators of anxiety- and depressive-like behaviors than methylphenidate hydrochloride treatment.

OBJETIVO: Hidrocloridrato de metilfenidato é a medicação preferida para o tratamento e manutenção do transtorno de atenção e hiperatividade. No entanto, os efeitos do tratamento crônico com hidrocloridrato de metilfenidato em diferentes idades e ciclos sobre o comportamento relacionado à ansiedade e à depressão ainda não está claro. Neste contexto, o presente estudo teve como objetivo avaliar os efeitos do tratamento com hidrocloridrato de metilfenidato sobre o comportamento relacionado à ansiedade e à depressão em diferentes idades e no ciclo claro e escuro. MÉTODO: Foram utilizados ratos Wistar machos jovens e adultos que receberam uma vez ao dia (ciclo claro e escuro) hidrocloridrato de metilfenidato (2mg/kg) ou salina com injeção intraperitoneal, durante 28 dias. Após duas horas da última injeção, os animais foram submetidos ao testes de labirinto em cruz elevada e natação forçada. RESULTADOS: A fase do ciclo claro e escuro foi um fator significativo para o comportamento relacionado à ansiedade. Além disso, não houve interação significativa entre os ciclos claro e escuro, idade e metilfenidato no comportamento relacionado à ansiedade e à depressão, mas foi observada uma interação significativa entre ciclo claro e escuro e idade no teste de natação forçada. CONCLUSÃO: Nossos resultados mostraram que a idade e o ciclo claro e escuro são moduladores significativos de ambos os comportamentos quanto do tratamento com hidrocloridrato de metilfenidato.

Plantas medicinais no tratamento do transtorno de ansiedade generalizada: uma revisão dos estudos clínicos controlados / Medicinal plants for the treatment of generalized anxiety disorder: a review of controlled clinical studies

OBJETIVO: Revisar os estudos clínicos controlados sobre a efetividade de plantas medicinais/fitoterápicos no transtorno de ansiedade generalizada. MÉTODO: Realizou-se uma busca (Medline, Web of Science, SciELO, Biblioteca Cochrane) por artigos originais utilizando as palavras ["plant OR phytomed* OR extract OR herbal OR medicinal (OR specific name plants)"] AND ("anxie* OR anxioly* OR tranquil* OR GAD"), delimitada a "human OR clinical trial OR randomized controlled trial OR meta-analysis OR review" e à língua inglesa. Os critérios de inclusão foram: estudos randomizados, comparativos e duplo-cegos. RESULTADOS: Foram selecionados sete dos 267 artigos encontrados. O Piper methysticum (kava-kava) foi o fitoterápico mais estudado, sendo sugerido um efeito ansiolítico. Entretanto, a maioria destes estudos incluiu outros transtornos de ansiedade e os dois estudos com transtorno de ansiedade generalizada apresentaram resultados contraditórios. Estudos isolados envolvendo Ginkgo biloba, Galphimia glauca, Matricaria recutita (camomila), Passiflora incarnata e Valeriana officinalis indicaram potencial efeito ansiolítico no transtorno de ansiedade generalizada. A Ginkgo biloba e a Matricaria recutita apresentaram um effect size ('d' de Cohen = 0,47 e 0,87) similar ou superior ao dos ansiolíticos atuais (0,17-0,38). Não foram localizados estudos com outras plantas. CONCLUSÃO: Apesar do potencial terapêutico dos fitoterápicos no transtorno de ansiedade generalizada, poucos ensaios clínicos controlados foram identificados, com a maioria apresentando limitações metodológicas.

OBJECTIVE: This work aimed to identify controlled trials, which evaluated effectiveness of herbal medicines in subjects suffering generalized anxiety disorder. METHOD: Controlled studies (randomized, comparative with placebo and/or standard drug, double-blind) were sought through electronic and hand-searches. The word strategy used "plant OR phytomed* OR extract OR herbal OR medicinal (OR specific name plants)" e "anxie* OR anxioly* OR tranquil* OR GAD", limited to "human OR clinical trial OR randomized controlled trial OR meta-analysis OR review". The search was restricted to English language. RESULTS: Piper methysticum presented an unequivocal anxiolytic effect, but most studies also included patients with other anxiety disorders (e.g. phobias). Isolated studies with Ginkgo biloba, Galphimia glauca, Matricaria recutita, Passiflora incarnata and Valeriana officinalis showed a potential use for anxious diseases. Despite this low number of studies, Ginkgo biloba and Matricaria recutita showed an effect size (Cohen's d = 0.47 to 0.87) similar or higher to standard anxiolytics drugs (benzodiazepines, buspirone and antidepressants - 0.17 to 0.38). No additional study with other plants was found. CONCLUSION: Despite the therapeutic potential of medicinal plants in generalized anxiety disorder, very few controlled trials assessing herbal medicines in generalized anxiety disorder were found. Additionally, these studies present serious flaw design.

Exploração farmacológica do sistema endocanabinoide: novas perspectivas para o tratamento de transtornos de ansiedade e depressão? / Pharmacological exploitation of the endocannabinoid system: new perspectives for the treatment of depression and anxiety disorders?

OBJETIVO: Este artigo revisa o sistema endocanabinoide e as respectivas estratégias de intervenções farmacológicas. MÉTODO: Realizou-se uma revisão da literatura sobre o sistema endocanabinoide e a sua farmacologia, considerando-se artigos originais ou de revisão escritos em inglês. DISCUSSÃO: Canabinoides são um grupo de compostos presentes na Cannabis Sativa (maconha), a exemplo do Δ9-tetraidrocanabinol e seus análogos sintéticos. Estudos sobre o seu perfil farmacológico levaram à descoberta do sistema endocanabinoide do cérebro de mamíferos. Este sistema é composto por pelo menos dois receptores acoplados a uma proteína G, CB1 e CB2, pelos seus ligantes endógenos (endocanabinoides; a exemplo da anandamida e do 2-araquidonoil glicerol) e pelas enzimas responsáveis por sintetizá-los e metabolizá-los. Os endocanabinoides representam uma classe de mensageiros neurais que são sintetizados sob demanda e liberados de neurônios pós-sinápticos para restringir a liberação de neurotransmissores clássicos de terminais pré-sinápticos. Esta sinalização retrógrada modula uma diversidade de funções cerebrais, incluindo ansiedade, medo e humor, em que a ativação de receptores CB1 pode exercer efeitos dos tipos ansiolítico e antidepressivo em estudos préclínicos. CONCLUSÃO: Experimentos com modelos animais sugerem que drogas que facilitam a ação dos endocanabinoides podem representar uma nova estratégia para o tratamento de transtornos de ansiedade e depressão.

OBJECTIVE: The present review provides a brief introduction into the endocannabinoid system and discusses main strategies of pharmacological interventions. METHOD: We have reviewed the literature relating to the endocannabinoid system and its pharmacology; both original and review articles written in English were considered. DISCUSSION: Cannabinoids are a group of compounds present in Cannabis Sativa (hemp), such as Δ9-tetrahydrocannabinol, and their synthetic analogues. Research on their pharmacological profile led to the discovery of the endocannabinoid system in the mammalian brain. This system comprises at least two G-protein coupled receptors, CB1 and CB2, their endogenous ligands (endocannabinoids; e.g. the fatty acid derivatives anandamide and 2-arachydonoyl glycerol), and the enzymes responsible for endocannabinoid synthesis and catabolism. Endocannabinoids represent a class of neuromessengers, which are synthesized on demand and released from post-synaptic neurons to restrain the release of classical neurotransmitters from pre-synaptic terminals.This retrograde signalling modulates a variety of brain functions, including anxiety, fear and mood, whereby activation of CB1 receptors was shown to exert anxiolytic-and antidepressant-like effects in preclinical studies. CONCLUSION: Animal experiments suggest that drugs promoting endocannabinoid action may represent a novel strategy for the treatment of depression and anxiety disorders.

Treatment and prevalence of generalized anxiety disorder and depression among primary care attendees

The aim of the study was to evaluate the prevalence of generalized anxiety disorder and depression and their treatment in a cross national sample of primary care patients. Four primary health care facilities in four Governorates, in the Kingdom of Bahrain. Design: Clinical Survey. Four primary health care facilities in four Governorates participated in one stage screening process to identify prevalence of generalized anxiety disorder and depression. Structured diagnostic interviews among 300 consecutive attendees in one day was used. The Mini International Neuro psychiatric Investigation [MINI] was used as screening tool. The association of depression and anxiety with factors such as age, sex, education and employment were evaluated. Generalized anxiety disorders prevalence rate was 52 [17.3], life time depression was 58 [19.3%] and current depression was 17 [5.6%]. Only 22 [7.3%] of the sample had either anxiety or depression in the past, of whom 41% received treatment. None of the examined factors was significantly linked to anxiety or depression. This study shows that generalized anxiety disorder and major depressive episode are very common among primary care attendees. Thus, primary care physicians should be alerted of this fact. A multifaceted program should be adopted for the detection and management of GAD and depression