DailyMed Label: PROSTIN

DailyMed Label: PROSTIN

2022

DailyMed Prescription

PROSTIN

alprostadil

Pharmacia & Upjohn Company LLC

NDC: 0009-0215

NDC: 0009-0215

NDC: 0009-0215

NDC: 0009-0215

NDC: 0009-0215

NDC: 0009-0215

NDC: 0009-0215

NDC: 0009-0215

NDC: 0009-0215

NDC: 0009-0215

PROSTIN VR PEDIATRIC Sterile Solution for intravascular infusion contains 500 micrograms alprostadil, more commonly known as prostaglandin E 1 , in 1.0 mL dehydrated alcohol. The chemical name for alprostadil is (11α,13E,15S)-11,15 dihydroxy-9-oxo-prost-13-en-1-oic acid, and the molecular weight is 354.49. Alprostadil is a white to off-white crystalline powder with a melting point between 110° and 116°C. Its solubility at 35°C is 8000 micrograms per 100 mL double distilled water. Structural Formula Chemical Structure

PROSTIN VR PEDIATRIC Sterile Solution is indicated for palliative, not definitive, therapy to temporarily maintain the patency of the ductus arteriosus until corrective or palliative surgery can be performed in neonates who have congenital heart defects and who depend upon the patent ductus for survival. Such congenital heart defects include pulmonary atresia, pulmonary stenosis, tricuspid atresia, tetralogy of Fallot, interruption of the aortic arch, coarctation of the aorta, or transposition of the great vessels with or without other defects. In infants with restricted pulmonary blood flow, the increase in blood oxygenation is inversely proportional to pretreatment pO 2 values; that is, patients with low pO 2 values respond best, and patients with pO 2 values of 40 torr or more usually have little response. PROSTIN VR PEDIATRIC should be administered only by trained personnel in facilities that provide pediatric intensive care.

The preferred route of administration for PROSTIN VR PEDIATRIC Sterile Solution is continuous intravenous infusion into a large vein. Alternatively, PROSTIN VR PEDIATRIC may be administered through an umbilical artery catheter placed at the ductal opening. Increases in blood pO 2 (torr) have been the same in neonates who received the drug by either route of administration. Begin infusion with 0.05 to 0.1 micrograms alprostadil per kilogram of body weight per minute. A starting dose of 0.1 micrograms per kilogram of body weight per minute is the recommended starting dose based on clinical studies; however, adequate clinical response has been reported using a starting dose of 0.05 micrograms per kilogram of body weight per minute. After a therapeutic response is achieved (increased pO 2 in infants with restricted pulmonary blood flow or increased systemic blood pressure and blood pH in infants with restricted systemic blood flow), reduce the infusion rate to provide the lowest possible dosage that maintains the response. This may be accomplished by reducing the dosage from 0.1 to 0.05 to 0.025 to 0.01 micrograms per kilogram of body weight per minute. If response to 0.05 micrograms per kilogram of body weight per minute is inadequate, dosage can be increased up to 0.4 micrograms per kilogram of body weight per minute although, in general, higher infusion rates do not produce greater effects. To prepare infusion solutions, dilute 1 mL of PROSTIN VR PEDIATRIC Sterile Solution with Sodium Chloride Injection USP or Dextrose Injection USP. Undiluted PROSTIN VR PEDIATRIC Sterile Solution may interact with the plastic sidewalls of volumetric infusion chambers causing a change in the appearance of the chamber and creating a hazy solution. Should this occur, the solution and the volumetric infusion chamber should be replaced. When using a volumetric infusion chamber, the appropriate amount of intravenous infusion solution should be added to the chamber first. The undiluted PROSTIN VR PEDIATRIC Sterile Solution should then be added to the intravenous infusion solution, avoiding direct contact of the undiluted solution with the walls of the volumetric infusion chamber. Dilute to volumes appropriate for the pump delivery system available. Prepare fresh infusion solutions every 24 hours. Discard any solution more than 24 hours old. Sample Dilutions and Infusion Rates to Provide a Dosage of 0.1 Micrograms per Kilogram of Body Weight per Minute Add 1 ampoule (500 micrograms) alprostadil to: Approximate Concentration of resulting solution (micrograms/mL) Infusion rate (mL/min per kg of body weight) Example: To provide 0.1 micrograms/kilogram of body weight per minute to an infant weighing 2.8 kilograms using a solution of 1 ampoule PROSTIN VR PEDIATRIC in 100 mL of saline or dextrose: INFUSION RATE = 0.02 mL/min per kg × 2.8 kg = 0.056 mL/min or 3.36 mL/hr. 250 mL 2 0.05 100 mL 5 0.02 50 mL 10 0.01 25 mL 20 0.005

None.

Cortical proliferation of the long bones, first observed in dogs, has also been observed in infants during long-term infusions of alprostadil. The cortical proliferation in infants regressed after withdrawal of the drug. In infants treated with PROSTIN VR PEDIATRIC at the usual doses for 10 hours to 12 days and who died of causes unrelated to ductus structural weakness, tissue sections of the ductus and pulmonary arteries have shown intimal lacerations, a decrease in medial muscularity and disruption of the medial and internal elastic lamina. Localized and aneurysmal dilatations and vessel wall edema also were seen compared to a series of pathological specimens from infants not treated with PROSTIN VR PEDIATRIC. The incidence of such structural alterations has not been defined. Because alprostadil inhibits platelet aggregation, use PROSTIN VR PEDIATRIC cautiously in neonates with bleeding tendencies. PROSTIN VR PEDIATRIC should not be used in neonates with respiratory distress syndrome. A differential diagnosis should be made between respiratory distress syndrome (hyaline membrane disease) and cyanotic heart disease (restricted pulmonary blood flow). If full diagnostic facilities are not immediately available, cyanosis (pO 2 less than 40 torr) and restricted pulmonary blood flow apparent on an X-ray are appropriate indicators of congenital heart defects. In all neonates, arterial pressure should be monitored intermittently by umbilical artery catheter, auscultation, or with a Doppler transducer. Should arterial pressure fall significantly, decrease the rate of infusion immediately. In infants with restricted pulmonary blood flow, measure efficacy of PROSTIN VR PEDIATRIC by monitoring improvement in blood oxygenation. In infants with restricted systemic blood flow, measure efficacy by monitoring improvement of systemic blood pressure and blood pH. No drug interactions have been reported between PROSTIN VR PEDIATRIC and the therapy standard in neonates with restricted pulmonary or systemic blood flow. Standard therapy includes antibiotics, such as penicillin and gentamicin; vasopressors, such as dopamine and isoproterenol; cardiac glycosides; and diuretics, such as furosemide. Long-term carcinogenicity studies and fertility studies have not been done. The Ames and Alkaline Elution assays reveal no potential for mutagenesis.

No drug interactions have been reported between PROSTIN VR PEDIATRIC and the therapy standard in neonates with restricted pulmonary or systemic blood flow. Standard therapy includes antibiotics, such as penicillin and gentamicin; vasopressors, such as dopamine and isoproterenol; cardiac glycosides; and diuretics, such as furosemide.

PROSTIN VR PEDIATRIC Sterile Solution is available in a package of 5 ×1 mL ampoules (NDC 0009-0215-05). Each mL contains 500 micrograms alprostadil in dehydrated alcohol. Store PROSTIN VR PEDIATRIC Sterile Solution in a refrigerator at 2° to 8°C (36° to 46°F).

Alprostadil (prostaglandin E 1 ) is one of a family of naturally occurring acidic lipids with various pharmacologic effects. Vasodilation, inhibition of platelet aggregation, and stimulation of intestinal and uterine smooth muscle are among the most notable of these effects. Intravenous doses of 1 to 10 micrograms of alprostadil per kilogram of body weight lower the blood pressure in mammals by decreasing peripheral resistance. Reflex increases in cardiac output and rate accompany the reduction in blood pressure. Smooth muscle of the ductus arteriosus is especially sensitive to alprostadil, and strips of lamb ductus markedly relax in the presence of the drug. In addition, administration of alprostadil reopened the closing ductus of new-born rats, rabbits, and lambs. These observations led to the investigation of alprostadil in infants who had congenital defects which restricted the pulmonary or systemic blood flow and who depended on a patent ductus arteriosus for adequate blood oxygenation and lower body perfusion. In infants with restricted pulmonary blood flow, about 50% responded to alprostadil infusion with at least a 10 torr increase in blood pO 2 (mean increase about 14 torr and mean increase in oxygen saturation about 23%). In general, patients who responded best had low pretreatment blood pO 2 and were 4 days old or less. In infants with restricted systemic blood flow, alprostadil often increased pH in those having acidosis, increased systemic blood pressure, and decreased the ratio of pulmonary artery pressure to aortic pressure. Alprostadil must be infused continuously because it is very rapidly metabolized. As much as 80% of the circulating alprostadil may be metabolized in one pass through the lungs, primarily by β- and ω- oxidation. The metabolites are excreted primarily by the kidney, and excretion is essentially complete within 24 hours after administration. No unchanged alprostadil has been found in the urine, and there is no evidence of tissue retention of alprostadil or its metabolites.

NDC 0009-0215-01 Rx ONLY Prostin VR Pediatric ® (alprostadil) injection, USP For Intravenous Use Only. Dilute Before Use. 1 mL 500 mcg/mL Refrigerate at 2° to 8°C (36° to 46°F). Distributed by Pharmacia & Upjohn Co Division of Pfizer Inc, NY, NY 10017 novaplus ™ PAA190991 LOT EXP PRINCIPAL DISPLAY PANEL - 1 mL Ampoule Label