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We were interested in the individual\u2019s experiential component, so we interviewed nonproblematic, ex-problematic and problematic Portuguese drug users. The conceptual framework was developed through the first group\u2019s data and then validated through a new consultation with these participants and a triangulation of sources and methodologies (observation). Findings show that some subjects managed to keep their drug use nonproblematic through ongoing self-regulation as a result of cost-benefit analysis and drug use management strategies. These strategies resulted mainly from the users\u2019 characteristics, the quality of drug using experiences, and experiences with other users. The importance of this study is in recognizing that nonproblematic drug use exists and that therein may lie important clues on how to minimize problematic use.<\/jats:p>","DOI":"10.1177\/0022042614559842","type":"journal-article","created":{"date-parts":[[2014,12,5]],"date-time":"2014-12-05T23:01:26Z","timestamp":1417820486000},"page":"133-150","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":22,"title":["Nonproblematic Illegal Drug Use"],"prefix":"10.1177","volume":"45","author":[{"given":"Olga S.","family":"Cruz","sequence":"first","affiliation":[{"name":"University Institute of Maia\u2013ISMAI, Portugal"}]}],"member":"179","published-online":{"date-parts":[[2014,12,4]]},"reference":[{"key":"e_1_3_3_2_1","volume-title":"Illegal leisure revisited: Changing patterns of alcohol and drug use in adolescents and young adults","author":"Aldridge J.","year":"2011","unstructured":"Aldridge J., Measham F., Williams L. 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