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FDA Approves Astellas' Vaprisol(R) (Conivaptan Hydrochloride Injection) Premixed in 5% Dextrose for the Treatment of Hyponatremia
Date:10/22/2008

Arginine vasopressin (AVP) receptor antagonist now approved in single-use

premixed formulation

DEERFIELD, Ill., Oct. 22 /PRNewswire/ -- Astellas Pharma US, Inc. today announced that the U.S. Food and Drug Administration (FDA) has approved a new premixed formulation of Vaprisol: Vaprisol(R) (conivaptan hydrochloride injection) Premixed in 5% Dextrose. Discovered and developed by Astellas, Vaprisol, an arginine vasopressin (AVP) receptor antagonist, is the first and only approved drug indicated for the treatment of both euvolemic and hypervolemic hyponatremia in hospitalized patients. Hyponatremia is a potentially life-threatening condition that occurs when the body's blood sodium level falls significantly below normal. Vaprisol was originally approved by the FDA in an ampule formulation for the treatment of euvolemic hyponatremia in December 2005 and hypervolemic hyponatremia in February 2007.

The 100mL, single-use premixed formulation of Vaprisol comes in an INTRAVIA(R) Container, a product of Baxter Healthcare Corporation, containing 20 mg of conivaptan hydrochloride in 5% Dextrose solution. Lactic acid, USP is added for pH adjustment to pH 3.4 to 3.8. The new formulation will make preparation easier for health care providers as it is requires no measuring or mixing. Additionally, it has an expiration date of 24 months, six months longer than the original ampule formulation.

"Vaprisol Premixed in 5% Dextrose will be helpful in quickly preparing treatment for hyponatremia patients," said Dr. Joseph Verbalis, M.D., Professor of Medicine and Physiology at Georgetown University. "This ready-to- use product will be useful for hospitals and emergency rooms."

Hyponatremia is present in approximately 28 percent of patients upon admission into acute hospital care and another 14 percent acquire the condition while in acute care. Severe cases are medical emergencies that can result in swelling of the brain, respira
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SOURCE Astellas Pharma US, Inc.
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