Trends in Psychiatry and Psychotherapy
https://trends.org.br/article/doi/10.1590/2237-6089-2017-0159
Trends in Psychiatry and Psychotherapy
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Craving for heroin: difference between methadone maintenance therapy patients with and without ADHD

Fissura por heroína: diferença entre pacientes em terapia de manutenção com metadona com e sem TDAH

Maurizio Coppola; Giuseppe Sacchetto; Raffaella Mondola

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Abstract

Abstract Introduction Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder persisting in adulthood in 40-60% of cases. Clinical and neuroimaging studies suggest that patients affected by both drug addiction and ADHD show higher rates of craving for drug than patients without ADHD. We designed a pilot open-label study to investigate the effects of ADHD on craving for heroin in methadone maintenance therapy patients. Method Patients were recruited from outpatient facilities in an addiction treatment unit in the municipality of Alba, Italy. They were assessed using the Structured Clinical Interview for DSM-5 (SCID-5), the SCID-5 for Personality Disorders (SCID-5-PD), the Diagnostic Interview for Adult ADHD, second edition (DIVA 2.0), and the Clinical Opiate Withdrawal Scale (COWS). Categorical variables were examined using the chi-square test, and continuous variables, the t-test and Mann-Whitney’s U test for normally and non-normally distributed data, respectively. Data distribution was evaluated using Shapiro-Wilk’s test. Significance was set at p=0.05. Bonferroni correction was applied (0.0063) to avoid type I error. Results A total of 104 patients were included in the study: 14 affected by ADHD (13.5%) and 90 were not affected (86.5%). Patients with ADHD showed higher intensity of craving for heroin than patients without ADHD in the absence of withdrawal symptoms. Conclusion Drug addiction and ADHD share various neurobiological mechanisms that mutually influence the evolution of both disorders. In particular, dopamine dysfunction within various brain circuits may influence impulsivity levels, motivation, inhibitory control, executive functions, and behavior and, consequently, the intensity of craving.

Keywords

Craving, addiction, ADHD, heroin

Resumo

Resumo Introdução O transtorno de déficit de atenção e hiperatividade (TDAH) é um transtorno do neurodesenvolvimento que persiste na idade adulta em 40-60% dos casos. Estudos clínicos e de neuroimagem sugerem que pacientes afetados tanto por adição quanto por TDAH apresentam maiores índices de fissura (craving) por droga do que pacientes sem TDAH. Este estudo piloto aberto investigou os efeitos do TDAH sobre fissura por heroína em pacientes em terapia de manutenção com metadona. Método Os pacientes foram recrutados em serviços ambulatoriais em uma unidade de tratamento de adição na cidade de Alba, Itália. Eles foram avaliados usando os seguintes instrumentos: Structured Clinical Interview for DSM-5 (SCID-5), SCID-5 for Personality Disorders (SCID-5-PD), Diagnostic Interview for Adult TDAH, second edition (DIVA 2.0) e Clinical Opiate Withdrawal Scale (COWS). Variáveis categóricas foram examinadas utilizando o teste do qui-quadrado, e variáveis contínuas, o teste t e o teste U de Mann-Whitney para dados com distribuição normal e não normal, respectivamente. A distribuição dos dados foi avaliada usando o teste de Shapiro-Wilk. O nível de significância foi estabelecido em p=0,05. A correção de Bonferroni foi aplicada (0,0063) para evitar erro tipo I. Resultados Um total de 104 pacientes foram incluídos no estudo: 14 com TDAH (13,5%) e 90 sem (86,5%). Pacientes com TDAH mostraram maior intensidade de fissura por heroína do que pacientes sem TDAH na ausência de sintomas de abstinência. Conclusão Adição e TDAH compartilham mecanismos neurobiológicos que influenciam mutuamente a evolução dos dois transtornos. Em particular, a disfunção da dopamina em vários circuitos cerebrais pode influenciar os níveis de impulsividade, motivação, controle inibitório, funções executivas e comportamento, e, portanto, a intensidade da fissura.

Palavras-chave

Fissura, adição, TDAH, heroína

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