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This case exemplifies the profound effect that electrolyte imbalances, in particular sodium depletion can have on a patient\u2019s mental status and is for the first time, we see this effect on two temporally unrelated occasions in the same patient.<\/jats:p>","DOI":"10.1136\/bcr-2017-219487","type":"journal-article","created":{"date-parts":[[2017,7,14]],"date-time":"2017-07-14T04:40:25Z","timestamp":1500007225000},"page":"bcr-2017-219487","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":6,"title":["Hyponatraemia-associated catatonia"],"prefix":"10.1136","volume":"2017","author":[{"given":"Eimear","family":"McGuire","sequence":"first","affiliation":[{"name":"Sligo Leitrim Mental Health, St. Columba's Hospital, Sligo, Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mythily","family":"Yohanathan","sequence":"additional","affiliation":[{"name":"Old Age Psychiatry, HSE West, Sligo, Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leona","family":"Lally","sequence":"additional","affiliation":[{"name":"Old Age Psychiatry, HSE West, Sligo, Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Geraldine","family":"McCarthy","sequence":"additional","affiliation":[{"name":"Sligo Leitrim Mental Health Service, NUI Galway, Sligo, Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2017,7,14]]},"reference":[{"key":"2025082707415251000_2017.jul14_1.bcr-2017-219487.1","first-page":"312","article-title":"\u201cCatatonia is not schizophrenia: Kraeplin\u2019s error\u201d","volume":"36","author":"Fink","year":"2010","journal-title":"Schizophrenia bulletin"},{"key":"2025082707415251000_2017.jul14_1.bcr-2017-219487.2","doi-asserted-by":"crossref","first-page":"78","DOI":"10.7812\/TPP\/13-143","article-title":"Special medical conditions associated with catatonia in the internal medicine setting: hyponatremia-inducing psychosis and subsequent catatonia","volume":"18","author":"Novac","year":"2014","journal-title":"Perm J"},{"key":"2025082707415251000_2017.jul14_1.bcr-2017-219487.3","doi-asserted-by":"publisher","DOI":"10.1111\/eci.12465"},{"key":"2025082707415251000_2017.jul14_1.bcr-2017-219487.4","unstructured":"DSM-IV. 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