{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,2]],"date-time":"2026-09-02T20:43:45Z","timestamp":1788381825487,"version":"build-2803163510"},"reference-count":31,"publisher":"Croatian Society for Medical Biochemistry and Laboratory Medicine","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Biochem. med. (Online)"],"published-print":{"date-parts":[[2024,2,15]]},"abstract":"<jats:p>Antidiuretic hormone (ADH) is secreted by the posterior pituitary gland. Unsuppressed release of ADH leads to hyponatremia. This condition is referred to as syndrome of inappropriate antidiuretic hormone secretion (SIADH). Hereby, a case report is presented on ciprofloxacin-induced SIADH. A 67-year-old male patient was examined in the emergency room with symptoms of lethargy, headache, lack of attention, and a generally depressed mood lasting for three days. One week prior, empirical antimicrobial therapy involving ciprofloxacin for prostatitis was initiated. Laboratory analysis showed no relevant abnormalities except for hyponatremia (Na = 129 mmol\/L). Chronic hyponatremia, thyroid dysfunction, and adrenal dysfunction were ruled out. Serum osmolality was 263 mOsmol\/kg, urine osmolality was 206 mOsmol\/kg, and urine sodium was 39 mmol\/L. Given that all criteria for SIADH were met, ciprofloxacin was discontinued, and fluid restriction was advised. Four days later, the patient\u2019s serum sodium concentrations nearly normalized (Na = 135 mmol\/L), and all symptoms resolved. The Naranjo Scale yielded a score of 8, supporting the likelihood of a probable adverse reaction to ciprofloxacin. This case is presented to raise awareness among clinicians about the potential of ciprofloxacin to cause even mild hyponatremia.<\/jats:p>","DOI":"10.11613\/bm.2024.010803","type":"journal-article","created":{"date-parts":[[2023,12,19]],"date-time":"2023-12-19T13:06:57Z","timestamp":1702991217000},"page":"131-136","source":"Crossref","is-referenced-by-count":8,"title":["Syndrome of inappropriate antidiuretic hormone secretion as an adverse reaction of ciprofloxacin: a case report and literature review"],"prefix":"10.11613","volume":"34","author":[{"given":"Sanja","family":"Mandi\u0107","sequence":"first","affiliation":[{"name":"Institute of Clinical Laboratory Diagnostics, University Hospital Centre Osijek, Osijek, Croatia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Silvija","family":"Canecki-Var\u017ei\u0107","sequence":"additional","affiliation":[{"name":"Department of Endocrinology and Metabolism Disorders, Internal Medicine Clinic, University Hospital Centre Osijek, Osijek, Croatia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ines","family":"Bili\u0107-\u0106ur\u010di\u0107","sequence":"additional","affiliation":[{"name":"Department of Endocrinology and Metabolism Disorders, Internal Medicine Clinic, University Hospital Centre Osijek, Osijek, Croatia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dubravka","family":"Li\u0161nji\u0107","sequence":"additional","affiliation":[{"name":"Department of Infectology and Dermatovenerology, Faculty of Medicine Osijek, J. J. Strossmayer University of Osijek, Osijek, Croatia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mihaela","family":"Zlosa","sequence":"additional","affiliation":[{"name":"Clinic for Infectious Diseases, University Hospital Centre Osijek, Osijek, Croatia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dario","family":"Sabadi","sequence":"additional","affiliation":[{"name":"Clinic for Infectious Diseases, University Hospital Centre Osijek, Osijek, Croatia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luka","family":"\u0160vitek","sequence":"additional","affiliation":[{"name":"Clinic for Infectious Diseases, University Hospital Centre Osijek, Osijek, Croatia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Barbara","family":"Grubi\u0161i\u0107","sequence":"additional","affiliation":[{"name":"Clinic for Infectious Diseases, University Hospital Centre Osijek, Osijek, Croatia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ema","family":"Schonberger","sequence":"additional","affiliation":[{"name":"Faculty of Medicine Osijek, J. 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