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Hyponatremia or hyponatraemia is a low concentration of sodium in the blood. [4] It is generally defined as a sodium concentration of less than 135 mmol/L (135 mEq/L), with severe hyponatremia being below 120 mEq/L. [3] [8] Symptoms can be absent, mild or severe.
Tolvaptan, sold under the brand name Samsca among others, is an aquaretic drug that functions as a selective, competitive vasopressin receptor 2 (V 2) antagonist used to treat hyponatremia (low blood sodium levels) associated with congestive heart failure, cirrhosis, and the syndrome of inappropriate antidiuretic hormone (SIADH).
The medical word for low sodium levels is hyponatremia. Although it's a fairly common condition, with up to 2% of people having some degree of it, the majority of these patients have only mildly ...
In general, hyponatremia is usually asymptomatic until severe. [10] Typical laboratory findings for tea and toast syndrome include a low serum osmolality (hypotonicity) with normal urine osmolality since antidiuretic hormone levels are normal. A common laboratory finding for the tea and toast phenomenon is manifestation as hyponatremia.
It was approved in 2004 for hyponatremia (low blood sodium levels). The compound was discovered by Astellas and marked in 2006. The drug is now marketed by Cumberland Pharmaceuticals, Inc. Conivaptan inhibits two of the three subtypes of the vasopressin receptor (V1a and V2). Effectively, it causes iatrogenic nephrogenic diabetes insipidus.
Moderate or severe hyponatremia, or hyponatremia with severe symptoms is treated by raising the serum sodium level by 1–2 mmol per liter per hour for the first few hours with a goal of raising levels less than 8–10 mmol per liter in the first 24 hours and 18 mmol per liter in the first 48 hours. [2]
Opting for low-sodium foods, defined as 140 mg of sodium or less per serving, can help keep your salt intake at bay. Even choosing items labeled "reduced sodium" or "no salt added" can make a ...
It is widely used (though off-label in many countries including the United States) in the treatment of hyponatremia (low blood sodium concentration) due to the syndrome of inappropriate antidiuretic hormone (SIADH) when fluid restriction alone has been ineffective. [10]