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OBJECTIVE: There is evidence that sweet substances such as saccharose can enhance the analgesic properties of endogenous opioids, leading to pain relief; it is also known that Cordyline dracaenoides Kunt, commonly known as uvarana, is used in folk medicine as an anti-inflammatory and analgesic agent. The aim of the present study was to compare the antinociceptive effects of uvarana aqueous extracts vs. saccharose in rats. METHOD: Twenty-four Wistar rats were used, divided into two groups of twelve, namely a uvarana and a saccharose group. Capsaicin was used to induce hyperalgesia and the nociceptive threshold was assessed every five minutes for a total of 50 minutes Baseline values were obtained and this was followed by administration of uvarana or saccharose at threedifferent concentrations (100, 250 and 300 g/L) The nociceptive threshold was assessed using the tail flick test. RESULT: In comparison to baseline values, uvarana and saccharose provoked significant and comparable antinociceptive effects at concentrations of 250 g/L and 300 g/L, respectively. CONCLUSION: Both substances caused similar antinociceptive effects in comparison to baseline values. RESUMO: OBJETIVO: Há evidância de que substâncias doces, tais como a sacarose podem acentuar as propriedades analgésicas dos opióides endógenos, com alívio da dor; sabe-se também Cordyline dracaenoides Kunth, vulgarmente conhecida como uvarana, é utilizada na medicina popular como anti-inflamatório e agente analgésico. O objetivo do presente estudo foi comparar os efeitos antinociceptivos de extratos aquosos da uvarana com a sacarose em ratos. MÉTODO: Foram utilizados vinte e quatro ratos Wistar, divididos em dois grupos de doze, um tratado com uvarana e outro com sacarose. A capsaicina foi usada para a induçãoo da hiperalgesia e o limiar nociceptivo foi avaliado a cada cinco minutos durante um total de 50 minutos. Valores basais foram obtidos e em seguida foram administradas oralmente extrato de uvarana ou sacarose em três diferentes concentrações (100, 250 e 300 g/L). O limiar nociceptivo foi avaliada através do teste de retirada da cauda (tail flick test). RESULTADO: Em comparação com os valores basais, auvarana e a sacarose provocaram efeitos antinociceptivos significativos e comparáveis em concentrações de 250 e 300 g/L, respectivamente. CONCLUSÃO: Ambas as substâncias causaram efeitos antinociceptivos semelhantes em relação aos valores basais.

Exposure to trauma in childhood is risk factors for the children and adolescents development. Researches have attempted to identify the psychological and neurobiological mechanisms by which exposure to trauma results negatively on the individual and also attempted develop psychological interventions to treating victims. This article aims to relate the exposure to childhood trauma and the development of Post Traumatic Stress Disorder (PTSD) and describe models of cognitive-behavioral intervention and reported in the literature for PTSD in children and adolescents. For this, we carried out a literature review. The article discusses the following topics: definition of abuse; effects findings from the exposure to maltreatment, in particular the development of PTSD, and description of interventions based on cognitive-behavioral therapy for patients with PTSD.