Stereochemistry | RACEMIC |
Molecular Formula | C26H25ClN2O3 |
Molecular Weight | 448.941 |
Optical Activity | ( + / - ) |
Defined Stereocenters | 0 / 1 |
E/Z Centers | 0 |
Charge | 0 |
SHOW SMILES / InChI
SMILES
CC1=CC=CC=C1C(=O)NC2=CC(C)=C(C=C2)C(=O)N3CCCC(O)C4=C3C=CC(Cl)=C4
InChI
InChIKey=GYHCTFXIZSNGJT-UHFFFAOYSA-N
InChI=1S/C26H25ClN2O3/c1-16-6-3-4-7-20(16)25(31)28-19-10-11-21(17(2)14-19)26(32)29-13-5-8-24(30)22-15-18(27)9-12-23(22)29/h3-4,6-7,9-12,14-15,24,30H,5,8,13H2,1-2H3,(H,28,31)
Tolvaptan is a selective and competitive arginine vasopressin receptor 2 antagonist. Vasopressin acts on the V2 receptors found in the walls of the vasculature and luminal membranes of renal collecting ducts. By blocking V2 receptors in the renal collecting ducts, aquaporins do not insert themselves into the walls thus preventing water absorption. This action ultimately results in an increase in urine volume, decrease urine osmolality, and increase electrolyte-free water clearance to reduce intravascular volume and an increase serum sodium levels. Tolvaptan is especially useful for heart failure patients as they have higher serum levels of vasopressin. Tolvaptan is used to treat low blood sodium levels (hyponatremia) associated with various conditions like congestive heart failure, cirrhosis, and syndrome of inappropriate antidiuretic hormones (SIADH). FDA approved on May 19, 2009. Tolvaptan is sold under the trade names Samsca and Jinarc.
Approval Year
Doses
AEs
Overview
CYP3A4 | CYP2C9 | CYP2D6 | hERG |
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Drug as perpetrator
Drug as victim
Tox targets
Sourcing
PubMed
Patents
Sample Use Guides
The usual starting dose for Samsca (Tolvaptan) is 15 mg administered once daily without regard to meals. Increase the dose to 30 mg once daily, after at least 24 hours, to a maximum of 60 mg once daily, as needed to achieve the desired level of serum sodium. Do not administer Samsca for more than 30 days to minimize the risk of liver injury
Route of Administration:
Oral