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Potential interference by dietary and drug components chemically similar to anthraquinones was investigated and the method was found to be specific in this respect. The diagnosis of magnesium laxative abuse is more difficult since magnesium is a component of body fluids. By inducing diarrhoea with magnesium salts in volunteers we have established that the diagnosis can be made by measuring magnesium concentrations in stool water, with 30 mmol\/L being an appropriate cut-off concentration.<\/jats:p>","DOI":"10.1177\/000456329102800605","type":"journal-article","created":{"date-parts":[[2014,2,5]],"date-time":"2014-02-05T16:58:39Z","timestamp":1391619519000},"page":"568-573","source":"Crossref","is-referenced-by-count":10,"title":["Diagnosis of the Abuse of Magnesium and Stimulant Laxatives"],"prefix":"10.1177","volume":"28","author":[{"given":"A","family":"Duncan","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A","family":"Cameron","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M J","family":"Stewart","sequence":"additional","affiliation":[{"name":"Institute of Biochemistry, Glasgow, Scotland G31 2ER, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"R I","family":"Russell","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[1991,11,1]]},"reference":[{"key":"bibr1-000456329102800605","author":"Duncan A","year":"1991","journal-title":"J R Soc Med"},{"key":"bibr2-000456329102800605","first-page":"92","volume-title":"Proceedings of the Association of Clinical Biochemists National Meeting: 1991 May 13\u201317. 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