Hyponatremia/etiology; Inappropriate ADH Syndrome/complications; Antidiuretic Hormone Receptor Antagonists; Benzazepines/adverse effects; Benzazepines/therapeutic use; Blood Volume; Body Water; Chemical and Drug Induced Liver Injury/etiology; Clinical Trials as Topic; Demeclocycline/adverse effects; Demeclocycline/therapeutic use; Diabetes Insipidus, Nephrogenic/chemically induced; Disease Management; Drug Interactions; Hospitalization; Humans; Hydrocortisone/deficiency; Hyponatremia/chemically induced; Hyponatremia/drug therapy; Hypothyroidism/complications; Inappropriate ADH Syndrome/drug therapy; Kidney Tubules, Collecting/physiopathology; Lithium/adverse effects; Lithium/therapeutic use; Multicenter Studies as Topic; Osmolar Concentration; Paraneoplastic Syndromes/complications; Saline Solution, Hypertonic/therapeutic use; Tolvaptan