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dailymed-drugs:2188rdfs:labelPitocin (Injection)lld:dailymed
dailymed-drugs:2188dailymed-instance:dosageParenteral drug products should be inspected visually for particulate matter and discoloration prior to administration whenever solution and container permit. The dosage of oxytocin is determined by the uterine response and must therefore be individualized and initiated at a very low level. The following dosage information is based upon various regimens and indications in general use.lld:dailymed
dailymed-drugs:2188dailymed-instance:descripti...Oxytocin injection USP is a sterile, clear, colorless aqueous solution of synthetic oxytocin, for intravenous infusion or intramuscular injection. Oxytoxin is a nonapeptide found in pituitary extracts from mammals. It is standardized to contain 10 units of oxytocic hormone/mL and contains 0.5% Chlorobutanol, a chloroform derivative as a preservative, with the pH adjusted with acetic acid. Oxytocin may contain up to 16% of total impurities. The hormone is prepared synthetically to avoid possible contamination with vasopressin (ADH) and other small polypeptides with biologic activity. Oxytocin has the empirical formula CHNOS(molecular weight 1007.19). The structural formula is as follows:lld:dailymed
dailymed-drugs:2188dailymed-instance:clinicalP...Uterine motility depends on the formation of the contractile protein actomyosin under the influence of the Ca-dependent phosphorylating enzyme myosin light-chain kinase. Oxytocin promotes contractions by increasing the intracellular Ca. Oxytocin has specific receptors in the myometrium and the receptor concentration increases greatly during pregnancy, reaching a maximum in early labor at term. The response to a given dose of oxytocin is very individualized and depends on the sensitivity of the uterus, which is determined by the oxytocin receptor concentration. However, the physician should be aware of the fact that oxytocin even in its pure form has inherent pressor and antidiuretic properties which may become manifest when large doses are administered. These properties are thought to be due to the fact that oxytocin and vasopressin differ in regard to only two of the eight amino acids . Oxytocin is distributed throughout the extracellular fluid. Small amounts of the drug probably reach the fetal circulation. Oxytocin has a plasma half-life of about 1 to 6 minutes which is decreased in late pregnancy and during lactation. Following intravenous administration of oxytocin, uterine response occurs almost immediately and subsides within 1 hour. Following intramuscular injection of the drug, uterine response occurs within 3 to 5 minutes and persists for 2 to 3 hours. Its rapid removal from plasma is accomplished largely by the kidney and the liver. Only small amounts are excreted in urine unchanged.lld:dailymed
dailymed-drugs:2188dailymed-instance:activeIng...dailymed-ingredient:oxytoci...lld:dailymed
dailymed-drugs:2188dailymed-instance:contraind...Antepartum use of oxytocin is contraindicated in any of the following circumstances:lld:dailymed
dailymed-drugs:2188dailymed-instance:supplyOxytocin Injection USP Synthetic is available as follows:NDC 0591-3553-69 Packages of twenty-five oversized 1-mL vials, each containing 10 units of oxytocin.lld:dailymed
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dailymed-drugs:2188dailymed-instance:boxedWarn...IMPORTANT NOTICE: Elective induction of labor is defined as the initiation of labor in a pregnant individual who has no medical indications for induction. Since the available data are inadequate to evaluate the benefits-to-risks considerations, oxytocin is not indicated for elective induction of labor.lld:dailymed
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dailymed-drugs:2188dailymed-instance:precautio...General:<br/>Drug Interactions: Severe hypertension has been reported when oxytocin was given three to four hours following prophylactic administration of a vasoconstrictor in conjunction with caudal block anesthesia. Cyclopropane anesthesia may modify oxytocin's cardiovascular effects, so as to produce unexpected results such as hypotension. Maternal sinus bradycardia with abnormal atrioventricular rhythms has also been noted when oxytocin was used concomitantly with cyclopropane anesthesia.<br/>Carcinogenesis, Mutagenesis, Impairment of Fertility: There are no animal or human studies on the carcinogenicity and mutagenicity of this drug, nor is there any information on its effect on fertility.<br/>Pregnancy:<br/>Teratogenic Effects: Animal reproduction studies have not been conducted with oxytocin. There are no known indications for use in the first trimester of pregnancy other than in relation to spontaneous or induced abortion. Based on the wide experience with this drug and its chemical structure and pharmacological properties, it would not be expected to present a risk of fetal abnormalities when used as indicated.<br/>Nonteratogenic Effects: See ADVERSE REACTIONS in the fetus or neonate.<br/>Labor and Delivery: See INDICATIONS AND USAGE section.lld:dailymed
dailymed-drugs:2188dailymed-instance:overdosag...Overdosage with oxytocin depends essentially on uterine hyperactivity whether or not due to hypersensitivity to this agent. Hyperstimula-tion with strong (hypertonic) or prolonged (tetanic) contractions, or a resting tone of 15 to 20 mm HO or more between contractions can lead to tumultuous labor, uterine rupture, cervical and vaginal lacerations, postpartum hemorrhage, uteroplacental hypoperfusion, and variable deceleration of fetal heart, fetal hypoxia, hypercapnia, perinatal hepatic necrosis or death. Water intoxication with convulsions, which is caused by the inherent antidiuretic effect of oxytocin, is a serious complication that may occur if large doses (40 to 50 milliunits/minute) are infused for long periods. Management consists of immediate discontinuation of oxytocin and symptomatic and supportive therapy.lld:dailymed
dailymed-drugs:2188dailymed-instance:genericMe...oxytocinlld:dailymed
dailymed-drugs:2188dailymed-instance:fullNamePitocin (Injection)lld:dailymed
dailymed-drugs:2188dailymed-instance:adverseRe...The following adverse reactions have been reported in the mother: Excessive dosage or hypersensitivity to the drug may result in uterine hypertonicity, spasm, tetanic contraction, or rupture of the uterus. The possibility of increased blood loss and afibrinogenemia should be kept in mind when administering the drug. Severe water intoxication with convulsions and coma has occurred, associated with a slow oxytocin infusion over a 24-hour period. Maternal death due to oxytocininduced water intoxication has been reported. The following adverse reactions have been reported in the fetus or neonate:lld:dailymed
dailymed-drugs:2188dailymed-instance:warningOxytocin, when given for induction of labor or augmentation of uterine activity, should be administered only by the intravenous route and with adequate medical supervision in a hospital.lld:dailymed
dailymed-drugs:2188dailymed-instance:indicatio...IMPORTANT NOTICE: Elective induction of labor is defined as the initiation of labor in a pregnant individual who has no medical indications for induction. Since the available data are inadequate to evaluate the benefits-to-risks considerations, oxytocin is not indicated for elective induction of labor. Antepartum: Oxytocin is indicated for the initiation or improvement of uterine contractions, where this is desirable and considered suitable for reasons of fetal or maternal concern, in order to achieve vaginal delivery. It is indicated for (1) induction of labor in patients with a medical indication for the initiation of labor, such as Rh problems, maternal diabetes, preeclampsia at or near term, when delivery is in the best interests of mother and fetus or when membranes are prematurely ruptured and delivery is indicated; (2) stimulation or reinforcement of labor, as in selected cases of uterine inertia; (3) as adjunctive therapy in the management of incomplete or inevitable abortion. In the first trimester, curettage is generally considered primary therapy. In second trimester abortion, oxytocin infusion will often be successful in emptying the uterus. Other means of therapy, however, may be required in such cases. Postpartum: Oxytocin is indicated to produce uterine contractions during the third stage of labor and to control postpartum bleeding or hemorrhage.lld:dailymed
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