Safety and Efficacy of SR121463B in Patients With Syndrome of Inappropriate Antidiuretic Hormone Secretion (SIADH Safety)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00264914
Recruitment Status : Completed
First Posted : December 13, 2005
Last Update Posted : January 21, 2009
Information provided by:

December 12, 2005
December 13, 2005
January 21, 2009
July 2005
August 2007   (Final data collection date for primary outcome measure)
Safety : Physical examination, vital signs, adverse events, electrocardiogram, hematology, serum chemistry
Same as current
Complete list of historical versions of study NCT00264914 on Archive Site
Serum sodium
Same as current
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Safety and Efficacy of SR121463B in Patients With Syndrome of Inappropriate Antidiuretic Hormone Secretion
An Open-Label, Multicenter Study Evaluating the Long-Term Safety and Efficacy of SR121463B in Patients With Syndrome of Inappropriate Antidiuretic Hormone Secretion

To determine the long-term safety and tolerability of SR121463B in patients with syndrome of inappropriate antidiuretic secretion (SIADH). To assess the long-term efficacy of SR121463B in maintaining normal levels of serum sodium in patients with SIADH.

Long term safety is evaluated further in an open label extension study with flexible doses of satavaptan.

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Phase 3
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
  • Inappropriate ADH Syndrome
  • Hyponatremia
Drug: SR121463B
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*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
August 2007
August 2007   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • Male or female patients aged 18 years and higher.
  • SIADH (the diagnosis of SIADH is based on several criteria including true serum hypoosmolality, inappropriate urinary osmolality, clinical euvolemia, elevated urinary sodium excretion while on normal salt and water intake, and normal renal, adrenal, and thyroid functions: drug induced SIADH will be limited to carbamazepine or derivatives and antidepressants in patients in whom these drugs cannot be discontinued or easily replaced by other drugs)
  • Serum sodium between 115 and 132 mmol/L (at least two consecutive serum sodium levels of at least 24 hours apart, from Day -6 to Day -1); for sodium levels between 125 and 132 mmol/L, the spontaneous serum sodium increase between the two assessments on Day -1 should be < 4 mmol/L
  • Urinary osmolality >200mOsm/kg H2O
  • Urinary sodium > 30 mmol/L

Exclusion Criteria:

  • Patients with acute postoperative SIADH
  • Presence of dilutional hyponatremia in hypervolemic states such as congestive heart failure and liver disease with ascites
  • Presence of signs of hypovolemia (e.g., orthostatic hypotension, increased serum urea nitrogen, increased serum albumin, increased hematocrit, …)
  • Administration of other V2 receptor antagonists or demeclocycline or lithium within one month, thiazides diuretics or spironolactone within 15 days, and urea or loop diuretics within two days prior to study drug administration
  • Patients with known treated or untreated adrenal deficiency
  • Presence of untreated hypothyroidism
  • Presence of uncontrolled diabetes with fasting glycemia > 200 mg/dL (> 11.09 mmol/L)
  • Presence of clinical and/or electrocardiographical signs of acute myocardial infarction or acute ischemia, or any other clinically significant abnormality according to the Investigator on a 12 lead ECG recording
  • Administration of inducers of CYP3A4 (phenytoin, rifampin, Saint John's Wort) or potent and moderate inhibitor so CYP3A4within two weeks prior to study drug administration
  • Inadequate hematological, renal and hepatic functions; hemoglobin (Hb) < 9 g/dL, neutrophils < 1,500/mm3, platelets <100,00/mm3, serum creatine >175 µmol/L (or clearance of creatine <30mL/min for where Ethics Committees require this parameter), ALT and /or AST >2x upper limit of normal
  • QTcB > 500 ms
  • Serum potassium > 5 mmol/L
Sexes Eligible for Study: All
18 Years and older   (Adult, Older Adult)
Contact information is only displayed when the study is recruiting subjects
Australia,   Belgium,   Brazil,   Canada,   France,   Germany,   Hong Kong,   Hungary,   Russian Federation,   Switzerland,   United States
EudraCT : 2004-005239-35
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ICD Study Director, sanofi-aventis
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Study Director: ICD CSD Sanofi
January 2009

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