Mental health professionals (MHPs) play a pivotal role in enhancing treatment outcomes for drug-using populations and minimizing their harm to the public. In response to a gap in the literature, this study sought to (a) assess MHPs' attitudes about the use and abuse of substances and their perception of their role in tackling substance abuse and related disorders in Nigeria, (b) identify predictors of perception, and (c) explore regional variations in attitude. Based on the validated drug and drug users' problems perception questionnaire and the substance abuse attitude survey, a cross-sectional survey was conducted in a randomized sample of 292 MHPs practicing in neuropsychiatric hospitals and in the mental health departments of teaching hospitals from 4 geopolitical zones of Nigeria. A response rate of 81.1% was achieved. MHPs' attitude about substance use tended towards the non-permissive, stereotypical, and moralistic spectrum, and its role perception was distinctly defined. Educational attainment (O.R = 0.50, p = 0.030), work-motivation (O.R = 0.55, p < 0.0001), and role-support (O.R = 1.48, p < 0.0001) significantly predicted MHPs' role perception. The Kruskal-Wallis test showed that there were significant regional variations in the attitudes of multidisciplinary MHPs, H (3) 18.727, p < 0.0001. Step-down follow up analysis revealed that the distribution of attitude total score vary significantly between the south-southern and southwestern region (p< 0.001), the northeastern and southeastern region of the country (p < 0.028). To foster the rehabilitation of this population and its reintegration into mainstream society, a holistic approach toward the standardization of drug treatment is needed. It should take into account the cultural, religious, and ethnic differences predominating in different regions.

Les personnes en situation d’itinérance, principalement des hommes, représentent pour certains une culture au sein de laquelle on identifie des personnes atteintes de troubles concomitants de santé mentale et d’abus de substances. Déjà vulnérables de par leur statut domiciliaire précaire, les personnes atteintes de cette concomitance le sont davantage et tendent à être plus isolées de leur famille que celles ne rencontrant pas cette double problématique. Le soutien familial est toutefois reconnu comme un élément favorisant l’engagement de comportements de santé et réduisant l’itinérance. Le but de cette étude était alors de décrire, du point de vue des hommes en situation d’itinérance atteints de troubles concomitants de santé mentale et d’abus de substances, les relations qu’ils entretiennent avec leur famille. Pour ce faire, le devis choisi fût une ethnographie ciblée. Différents degrés d’observation participante au sein de la Mission Old Brewery et des entrevues avec neuf informateurs-clés ont été les principales méthodes de collecte des données. L’analyse des données qualitative était soutenue par le guide proposé par Roper et Shapira (2000) ainsi que l’épistémologie constructiviste et l’approche systémique familiale de Calgary (Wright & Leahey, 2013) qui furent les cadres de référence de cette étude. Les résultats font ressortir trois thèmes explicitant 1) l’influence du contexte de vie dans les relations familiales, 2) la teneur conflictuelle de ces relations ainsi que 3) le soutien familial perçu. Finalement, des recommandations pour la pratique infirmière ainsi que des pistes pour de futures recherches sont suggérées. / Homeless people are largely represented of men and account for some culture in which we identify people with co-occurring mental health and substance abuse. Already vulnerable because of their precarious housing status, people with this conjunction are even more vulnerable and tend to be more isolated from their families than those who don’t meet this dual challenge. Family support is however recognized as an element favoring the commitment of health behaviors and reducing homelessness. The purpose of this targeted ethnography was to described, in terms of men experiencing homelessness suffering from co-occurring mental health and substance abuse, their relationships with their families. Different degrees of participant observation in the Old Brewery Mission and interviews with nine key informants were the main data collection methods. The analysis of qualitative data was supported by the guide proposed by Roper and Shapira (2000) and constructivist epistemology and the family systematic approach of Calgary (Wright & Leahey, 2013) who were the frameworks of this study. The results highlight three themes explaining 1) the influence of the living environment in family relationships, 2) the conflictual content of these relations and 3) the perceived family support. Finally, recommendations for nursing practice and ways to future research are suggested.