Source:http://www4.wiwiss.fu-berlin.de/dailymed/resource/drugs/954
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Desmopressin Acetate (Solution)
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Primary Nocturnal Enuresis: Dosage should be adjusted according to the individual. The recommended initial dose for those 6 years of age and older is 20��g or 0.2 mL solution intranasally at bedtime. Adjustment up to 40��g is suggested if the patient does not respond. Some patients may respond to 10��g and adjustment to that lower dose may be done if the patient has shown a response to 20��g. It is recommended that one-half of the dose be administered per nostril. Adequately controlled studies with intranasal Desmopressin acetate in primary nocturnal enuresis have not been conducted beyond 4���8 weeks.<br/>Central Cranial Diabetes Insipidus: This drug is administered into the nose through a soft, flexible plastic rhinal tube which has four graduation marks on it that measure 0.2, 0.15, 0.1 and 0.05 mL.Desmopressin Acetate Rhinal Tubedosage must be determined for each individual patient and adjusted according to the diurnal pattern of response. Response should be estimated by two parameters: adequate durationof sleep and adequate, not excessive, water turnover. Patients with nasal congestion and blockage have often responded well to intranasal Desmopressin acetate. The usual dosage range in adults is 0.1 to 0.4 mL daily, either as a single dose or divided into two or three doses. Most adults require 0.2 mL daily in two divided doses. The morning and evening doses should be separately adjusted for an adequate diurnal rhythm of water turnover. For children aged 3 months to 12 years, the usual dosage range is 0.05 to 0.3 mL daily, either as a single dose or divided into two doses. About 1/4 to 1/3 of patients can be controlled by a single daily dose of Desmopressin acetate administered intranasally.
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Desmopressin Acetate Rhinal Tubeis a synthetic analogue of the natural pituitary hormone 8-arginine vasopressin (ADH), an antidiuretic hormone affecting renal water conservation. It is chemically defined as follows: Mol. wt. 1183.34 Empirical formula: CHNOS���CHO���3HO 1-(3-mercaptopropionic acid)-8-D-arginine vasopressin monoacetate (salt) trihydrate. Desmopressin Acetate Rhinal Tubeis provided as an aqueous solution for intranasal use. Each mL contains:
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Desmopressin Acetate Rhinal Tubecontains as active substance desmopressin acetate, a synthetic analogue of the natural hormone arginine vasopressin. One mL (0.1 mg) of intranasal Desmopressin acetate has an antidiuretic activity of about 400 IU; 10��g of desmopressin acetate is equivalent to 40 IU.
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Desmopressin Acetate Rhinal Tubeis contraindicated in individuals with known hypersensitivity to desmopressin acetate or to any of the components ofDesmopressin Acetate Rhinal Tube.
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Desmopressin Acetate Rhinal Tubeis available in a 2.5 mL vial, packaged with two rhinal tube applicators per carton (NDC 55566-5020-1). Also available in shelf packs of 10��2.5 mL vials (NDC 55566-5020-2). Store refrigerated 2 to 8 C (36 to 46 F). When traveling, closed bottles will maintain stability for 3 weeks when stored at controlled room temperature, 20 to 25 C (68 to 77 F). Keep out of the reach of children.
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General: Intranasal Desmopressin acetate at high dosage has infrequently produced a slight elevation of blood pressure, which disappeared with a reduction in dosage. The drug should be used with caution in patients with coronary artery insufficiency and/or hypertensive cardiovascular disease because of possible rise in blood pressure. Desmopressin acetate should be used with caution in patients with conditions associated with fluid and electrolyte imbalance, such as cystic fibrosis, because these patients are prone to hyponatremia. Rare severe allergic reactions have been reported with Desmopressin acetate. Anaphylaxis has been reported with intravenous administration of Desmopressin acetate. Injection, but not with Desmopressin Acetate Intranasal.<br/>Central Cranial Diabetes Insipidus: SinceDesmopressin Acetate Rhinal Tubeis used intranasally, changes in the nasal mucosa such as scarring, edema, or other disease may cause erratic, unreliable absorption in which case intranasal Desmopressin acetate should not be used. For such situations, Desmopressin Acetate Injection should be considered.<br/>Primary Nocturnal Enuresis: If changes in the nasal mucosa have occurred, unreliable absorption may result.Desmopressin Acetate Rhinal Tubeshould be discontinued until the nasal problems resolve.<br/>Laboratory Tests: Laboratory tests for following the patient with central cranial diabetes insipidus or post-surgical or head trauma-related polyuria and polydipsia include urine volume and osmolality. In some cases plasma osmolality measurements may be required. For the healthy patient with primary nocturnal enuresis, serum electrolytes should be checked at least once if therapy is continued beyond 7 days.<br/>Drug Interactions: Although the pressor activity of Desmopressin acetate is very low compared to the antidiuretic activity, use of large doses of intranasal Desmopressin acetate with other pressor agents should only be done with careful patient monitoring.<br/>Carcinogenesis, Mutagenesis, Impairment of Fertility: Studies with Desmopressin acetate have not been performed to evaluate carcinogenic potential, mutagenic potential or effects on fertility.<br/>Pregnancy Category B: Fertility studies have not been done. Teratology studies in rats and rabbits at doses from 0.05 to 10��g/kg/day (approximately 0.1 times the maximum systemic human exposure in rats and up to 38 times the maximum systemic human exposure in rabbits based on surface area, mg/m) revealed no harm to the fetus due to Desmopressin acetate. There are, however, no adequate and well controlled studies in pregnant women. Because animal reproduction studies are not always predictive of human response, this drug should be used during pregnancy only if clearly needed. Several publications of desmopressin acetate's use in the management of diabetes insipidus during pregnancy are available; these include a few anecdotal reports of congenital anomalies and low birth weight babies. However, no causal connection between these events and desmopressin acetate has been established. A fifteen year, Swedish epidemiologic study of the use of desmopressin acetate in pregnant women with diabetes insipidus found the rate of birth defects to be no greater than that in the general population; howeverthe statistical power of this study is low. As opposed to preparations containing natural hormones, desmopressin acetate in antidiuretic doses has no uterotonic action and the physician will have to weigh the therapeutic advantages against the possible risks in each case.<br/>Nursing Mothers: There have been no controlled studies in nursing mothers. A single study in postpartum women demonstrated a marked change in plasma, but little if any change in assayable Desmopressin acetate in breast milk following an intranasal dose of 10��g. It is not known whether this drug is excreted in human milk. Because many drugs are excreted in human milk, caution should be exercised when Desmopressin acetate is administered to a nursing woman.<br/>Pediatric Use:<br/>Primary Nocturnal Enuresis: Desmopressin Acetate Rhinal Tubehas been used in childhood nocturnal enuresis. Short-term (4���8 weeks)Desmopressin Acetate Rhinal Tubeadministration has been shown to be safe and modestly effective in pediatric patients aged 6 years or older with severe childhood nocturnal enuresis. Adequately controlled studies with intranasal Desmopressin acetate in primary nocturnal enuresis have not been conducted beyond 4���8 weeks. The dose should be individually adjusted to achieve the best results.<br/>Central Cranial Diabetes Insipidus: Desmopressin Acetate Rhinal Tubehas been used in pediatric patients with diabetes insipidus. Use in infants and pediatric patients will require careful fluid intake restriction to prevent possible hyponatremia and water intoxication. The dose must be individually adjusted to the patient with attention in the very young to the danger of an extreme decrease in plasma osmolality with resulting convulsions. Dose should start at 0.05 mL or less. There are reports of an occasional change in response with time, usually greater than 6 months. Some patients may show a decreased responsiveness, others a shortened duration of effect. There is no evidence this effect is due to the development of binding antibodies but may be due to a local inactivation of the peptide.
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In case of overdosage, the dose should be reduced, frequency of administration decreased, or the drug withdrawn according to the severity of the condition. There is no known specific antidote for desmopressin acetate orDesmopressin Acetate Rhinal Tube. An oral LDhas not been established. An intravenous dose of 2 mg/kg in mice demonstrated no effect.
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desmopressin acetate
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Desmopressin Acetate (Solution)
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Infrequently, high dosages of intranasal Desmopressin acetate have produced transient headache and nausea. Nasal congestion, rhinitis and flushing have also been reported occasionally along with mild abdominal cramps. These symptoms disappeared with reduction in dosage. Nosebleed, sore throat, cough and upper respiratory infections have also been reported. The following table lists the percent of patients having adverse experiences without regard to relationship to study drug from the pooled pivotal study data for nocturnal enuresis. SeeWARNINGSfor the possibility of water intoxication and hyponatremia.
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Primary Nocturnal Enuresis: Desmopressin Acetate Rhinal Tubeis indicated for the management of primary nocturnal enuresis. It may be used alone or adjunctive to behavioral conditioning or other non-pharmacological intervention. It has been shown to be effective in some cases that are refractory to conventional therapies.<br/>Central Cranial Diabetes Insipidus: Desmopressin Acetate Rhinal Tubeis indicated as antidiuretic replacement therapy in the management of central cranial diabetes insipidus and for management of the temporary polyuria and polydipsia following head trauma or surgery in the pituitary region. It is ineffective for the treatment of nephrogenic diabetes insipidus. The use ofDesmopressin Acetate Rhinal Tubein patients with an established diagnosis will result in a reduction in urinary output with increase in urine osmolality and a decrease in plasma osmolality. This will allow the resumption of a more normal life-style with a decrease in urinary frequency and nocturia. There are reports of an occasional change in response with time, usually greater than 6 months. Some patients may show a decreased responsiveness, others a shortened duration of effect. There is no evidence this effect is due to the development of binding antibodies but may be due to a local inactivation of the peptide. Patients are selected for therapy by establishing the diagnosis by means of the water deprivation test, the hypertonic saline infusion test, and/or the response to antidiuretic hormone. Continued response to intranasal Desmopressin acetate can be monitored by urine volume and osmolality. Desmopressin acetate is also available as a solution for injection when the intranasal route may be compromised. These situations include nasal congestion and blockage, nasal discharge, atrophy of nasal mucosa, and severe atrophic rhinitis. Intranasal delivery may also be inappropriate where there is an impaired level of consciousness. In addition, cranial surgical procedures, such as transsphenoidal hypophysectomy create situations where an alternative route of administration is needed as in cases of nasal packing or recovery from surgery.
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Desmopressin Acetate
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