Drug: Amicar

AMICAR (aminocaproic acid) is 6-aminohexanoic acid, which acts as an inhibitor of fibrinolysis. Its chemical structure is: AMICAR (aminocaproic acid) is soluble in water, acid, and alkaline solutions; it is sparingly soluble in methanol and practically insoluble in chloroform. AMICAR (aminocaproic acid) Oral Solution for oral administration, contains 0.25 g/mL of aminocaproic acid with methylparaben 0.20%, propylparaben 0.05%, edetate disodium 0.30% as preservatives and the following inactive ingredients: sodium saccharin, sorbitol solution, citric acid anhydrous, natural and artificial raspberry flavor and an artificial bitterness modifier. Each AMICAR (aminocaproic acid) Tablet, for oral administration contains 500 mg or 1000 mg of aminocaproic acid and the following inactive ingredients: povidone, crospovidone, stearic acid, and magnesium stearate.

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AMICAR (aminocaproic acid) is generally well tolerated. The following adverse experiences have been reported: General Edema, headache, malaise. Hypersensitivity Reactions Allergic and anaphylactoid reactions, anaphylaxis. Cardiovascular Bradycardia, hypotension, peripheral ischemia, thrombosis. Gastrointestinal Abdominal pain, diarrhea, nausea, vomiting. Hematologic Agranulocytosis, coagulation disorder, leukopenia, thrombocytopenia. Musculoskeletal CPK increased, muscle weakness, myalgia, myopathy (see WARNINGS), myositis, rhabdomyolysis. Neurologic Confusion, convulsions, delirium, dizziness, hallucinations, intracranial hypertension, stroke, syncope. Respiratory Dyspnea, nasal congestion, pulmonary embolism. Skin Pruritis, rash. Special Senses Tinnitus, vision decreased, watery eyes. Urogenital BUN increased, renal failure. There have been some reports of dry ejaculation during the period of AMICAR (aminocaproic acid) treatment. These have been reported to date only in hemophilia patients who received the drug after undergoing dental surgical procedures. However, this symptom resolved in all patients within 24 to 48 hours of completion of therapy. Read the Amicar (aminocaproic acid) Side Effects Center for a complete guide to possible side effectsLearn More »

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An identical dosage regimen may be followed by administering AMICAR (aminocaproic acid) Tablets or AMICAR (aminocaproic acid) Oral Solution as follows: For the treatment of acute bleeding syndromes due to elevated fibrinolytic activity, it is suggested that 5 AMICAR (aminocaproic acid) 1000 mg Tablets or 10 AMICAR (aminocaproic acid) 500 mg Tablets (5 g) or 20 milliliter of AMICAR (aminocaproic acid) Oral Solution (5 g) be administered during the first hour of treatment, followed by a continuing rate of 1 AMICAR (aminocaproic acid) 1000 mg Tablet or 2 AMICAR (aminocaproic acid) 500 mg Tablets (1 g) or 5 milliliter of AMICAR (aminocaproic acid) Oral Solution (1.25 g) per hour. This method of treatment would ordinarily be continued for about 8 hours or until the bleeding situation has been controlled.

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Drug Laboratory Test Interactions Prolongation of the template bleeding time has been reported during continuous intravenous infusion of AMICAR (aminocaproic acid) at dosages exceeding 24 g/day. Platelet function studies in these patients have not demonstrated any significant platelet dysfunction. However, in vitro studies have shown that at high concentrations (7.4 mMol/L or 0.97 mg/mL and greater) aminocaproic acid inhibits ADP and collagen-induced platelet aggregation, the release of ATP and serotonin, and the binding of fibrinogen to the platelets in a concentration-response manner. Following a 10 g bolus of AMICAR (aminocaproic acid) , transient peak plasma concentrations of 4.6 mMol/L or 0.60 mg/mL have been obtained. The concentration of AMICAR (aminocaproic acid) necessary to maintain inhibition of fibrinolysis is 0.99 mMol/L or 0.13 mg/mL. Administration of a 5 g bolus followed by 1 to 1.25 g/hr should achieve and sustain plasma levels of 0.13 mg/mL. Thus, concentrations which have been obtained in vivo clinically in patients with normal renal function are considerably lower than the in vitro concentrations found to induce abnormalities in platelet function tests. However, higher plasma concentrations of AMICAR (aminocaproic acid) may occur in patients with severe renal failure. Read the Amicar Drug Interactions Center for a complete guide to possible interactions Learn More »

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AMICAR (aminocaproic acid) is useful in enhancing hemostasis when fibrinolysis contributes to bleeding. In lifethreatening situations, transfusion of appropriate blood products and other emergency measures may be required. Fibrinolytic bleeding may frequently be associated with surgical complications following heart surgery (with or without cardiac bypass procedures) and portacaval shunt; hematological disorders such as amegakaryocytic thrombocytopenia (accompanying aplastic anemia); acute and life-threatening abruptio placentae; hepatic cirrhosis; and neoplastic disease such as carcinoma of the prostate, lung, stomach, and cervix. Urinary fibrinolysis, usualIy a normal physiological phenomenon, may contribute to excessive urinary tract fibrinolytic bleeding associated with surgical hematuria (following prostatectomy and nephrectomy) or nonsurgical hematuria (accompanying polycystic or neoplastic diseases of the genitourinary system). (See WARNINGS.)

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AMICAR (aminocaproic acid) should not be used when there is evidence of an active intravascular clotting process. When there is uncertainty as to whether the cause of bleeding is primary fibrinolysis or disseminated intravascular coagulation (DIC), this distinction must be made before administering AMICAR (aminocaproic acid) . The following tests can be applied to differentiate the two conditions:
  • Platelet count is usually decreased in DIC but normal in primary fibrinolysis.
  • Protamine paracoagulation test is positive in DIC; a precipitate forms when protamine sulfate is dropped into citrated plasma. The test is negative in the presence of primary fibrinolysis.
  • The euglobulin clot Iysis test is abnormal in primary fibrinolysis but normal in DIC.
AMICAR (aminocaproic acid) must not be used in the presence of DIC without concomitant heparin. Last reviewed on RxList: 3/11/2009
This monograph has been modified to include the generic and brand name in many instances.

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A few cases of acute overdosage with AMICAR (aminocaproic acid) administered intravenously have been reported. The effects have ranged from no reaction to transient hypotension to severe acute renal failure leading to death. One patient with a history of brain tumor and seizures experienced seizures after receiving an 8 gram bolus injection of AMICAR (aminocaproic acid) . The single dose of AMICAR (aminocaproic acid) causing symptoms of overdosage or considered to be life-threatening is unknown. Patients have tolerated doses as high as 100 grams while acute renal failure has been reported following a dose of 12 grams. The intravenous and oral LD50 of AMICAR (aminocaproic acid) were 3.0 and 12.0 g/kg, respectively, in the mouse and 3.2 and 16.4 g/kg, respectively, in the rat. An intravenous infusion dose of 2.3 g/kg was lethal in the dog. On intravenous administration, tonic-clonic convulsions were observed in dogs and mice. No treatment for overdosage is known, although evidence exists that AMICAR (aminocaproic acid) is removed by hemodialysis and may be removed by peritoneal dialysis. Pharmacokinetic studies have shown that total body clearance of AMICAR (aminocaproic acid) is markedly decreased in patients with severe renal failure.

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AMICAR®
(aminocaproic acid) AMICAR (aminocaproic acid) Oral Solution, 0.25 g/mL Each mL of raspberry-flavored oral solution contains 0.25 g/mL of aminocaproic acid. 16 Fl. Oz. (473 mL) Bottle – NDC 66479-023-56 Store Between 15°-30°C (59°-86°F); Dispense in Tight Containers; Do Not Freeze. AMICAR (aminocaproic acid) 500 mg Tablets Each round, white tablet, engraved with XP on one side and scored on the other with A to the left of the score and 10 on the right, contains 500 mg of aminocaproic acid. Bottle of 100 – NDC 66479-021-82 Store Between 15°-30°C (59°-86°F); Dispense in Tight Containers. AMICAR (aminocaproic acid) 1000 mg Tablets Each oblong, white tablet, engraved with XP on one side and scored on the other with A to the left of the score and 20 on the right, contains 1000 mg of aminocaproic acid. Bottle of 100 – NDC 66479-022-82 Store Between 15°-30°C (59°-86°F); Dispense in Tight Containers. Marketed by : Xanodyne Pharmaceuticals, Newport, KY 41071, Rev. 09/08. Last reviewed on RxList: 3/11/2009
This monograph has been modified to include the generic and brand name in many instances.

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General AMICAR (aminocaproic acid) inhibits both the action of plasminogen activators and to a lesser degree, plasmin activity. The drug should NOT be administered without a definite diagnosis and/or laboratory finding indicative of hyperfibrinolysis (hyperplasminemia).1 Inhibition of fibrinolysis by aminocaproic acid may theoretically result in clotting or thrombosis. However, there is no definite evidence that administration of aminocaproic acid has been responsible for the few reported cases of intravascular clotting which followed this treatment. Rather, it appears that such intravascular clotting was most likely due to the patient's preexisting clinical condition, e.g., the presence of DIC. It has been postulated that extravascular clots formed in vivo may not undergo spontaneous Iysis as do normal clots. Reports have appeared in the literature of an increased incidence of certain neurological deficits such as hydrocephalus, cerebral ischemia, or cerebral vasospasm associated with the use of antifibrinolytic agents in the treatment of subarachnoid hemorrhage (SAH). All of these events have also been described as part of the natural course of SAH, or as a consequence of diagnostic procedures such as angiography. Drug relatedness remains unclear. Aminocaproic acid should not be administered with Factor IX Complex concentrates or Anti-Inhibitor Coagulant concentrates, as the risk of thrombosis may be increased. Laboratory Tests The use of AMICAR (aminocaproic acid) should be accompanied by tests designed to determine the amount of fibrinolysis present. There are presently available: (a) general tests such as those for the determination of the Iysis of a clot of blood or plasma; and (b) more specific tests for the study of various phases of the fibrinolytic mechanisms. These latter tests include both semiquantitative and quantitative techniques for the determination of profibrinolysin, fibrinolysin, and antifibrinolysin. Carcinogenesis, Mutagenesis, Impairment of Fertility Long-term studies in animals to evaluate the carcinogenic potential of AMICAR (aminocaproic acid) and studies to evaluate its mutagenic potential have not been conducted. Dietary administration of an equivalent of the maximum human therapeutic dose of AMICAR (aminocaproic acid) to rats of both sexes impaired fertility as evidenced by decreased implantations, litter sizes and number of pups born. Pregnancy Pregnancy Category C Animal reproduction studies have not been conducted with AMICAR (aminocaproic acid) . It is also not known whether AMICAR (aminocaproic acid) can cause fetal harm when administered to a pregnant woman or can affect reproduction capacity. AMICAR (aminocaproic acid) should be given to a pregnant woman only if clearly needed. Nursing Mothers 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 AMICAR (aminocaproic acid) is administered to a nursing woman. Pediatric Use Safety and effectiveness in pediatric patients have not been established. REFERENCES 1 Stefanini M, Dameshek W: The Hemorrhagic Disorders, Ed. 2, New York, Grune and Stratton; 1962:510-514.Last reviewed on RxList: 3/11/2009
This monograph has been modified to include the generic and brand name in many instances.

Source: http://www.rxlist.com

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