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Liquid Formulation, Solvent Detergent Treated Manufactured by: CSL Behring AG Wankdorfstrasse 10 CH-3000 Berne 22 Switzerland Imported and Distributed by: CSL Behring Canada, Inc. 55 Metcalfe Street, Suite 1460 Ottawa, Ontario K1P 6L5 Canada Liquid Formulation, Solvent Detergent Treated ACTION AND CLINICAL PHARMACOLOGY
Cytogam®, Cytomegalovirus Immune Globulin Intravenous (Human) (CMV-IGIV), contains IgG antibodies representative of the large number of normal persons who contributed to the plasma pools from which the product was derived. The globulin contains a relatively high concentration of antibodies directed against Cytomegalovirus (CMV). In the case of persons who may be exposed to CMV, Cytogam® can raise the relevant antibodies to levels sufficient to attenuate or reduce the incidence of serious In two separate clinical trials, Cytogam® was shown to provide effective prophylaxis in renal transplant recipients at risk for primary CMV disease. In the first randomized trial,1 the incidence of virologically confirmed CMV-associated syndromes was reduced from 60% in controls (n=35) to 21% in recipients of CMV immune globulin (n=24) (P <0.01); marked leukopenia was reduced from 37% in controls to 4% in globulin recipients (P <0.01); and fungal or parasitic superinfections were not seen in globulin recipients but occurred in 20% of controls (P=0.05). Serious CMV disease was reduced from 46% to 13%. There was a concomitant but not statistically significant reduction in the incidence of CMV pneumonia (17% of controls as compared with 4% of globulin recipients). There was no effect on rates of viral isolation or seroconversion although the rate of viremia was less in Cytogam® recipients. In a subsequent non-randomized trial in renal transplant recipients (n=36),2 the incidence of virologically confirmed CMV-associated syndrome was reduced to 36% in the globulin recipients in comparison to a 60% incidence in control patients (n=35) in the randomized trial. The rates of CMV- associated pneumonia, CMV-associated hepatitis, and concomitant fungal and parasitic superinfection were similar to those in the first trial. INDICATIONS AND CLINICAL USE
Cytomegalovirus Immune Globulin Intravenous (Human) is indicated for the attenuation of primary (1°) Cytomegalovirus disease associated with kidney transplantation. Specifically, the product is indicated for kidney transplant recipients who are seronegative for CMV and who receive a kidney from a CMV seropositive donor. In a population of seronegative recipients of seropositive kidneys approximately 75% of the untreated recipients would be expected to develop CMV disease.3,4 Clinical studies have shown a 50% reduction in 1° CMV disease in renal transplant patients given Cytomegalovirus Immune Globulin Intravenous (Human).1,2,5 CONTRAINDICATIONS
Cytogam®, Cytomegalovirus Immune Globulin Intravenous (Human), should not be used in individuals with a history of a prior severe reaction associated with the administration of this or other human immunoglobulin preparations. Persons with selective immunoglobulin A deficiency have the potential for developing antibodies to immunoglobulin A and could have anaphylactic reactions to subsequent administration of blood products that contain immunoglobulin A, including Cytogam®. WARNINGS
Cytogam®, Cytomegalovirus Immune Globulin Intravenous (Human) is made from human plasma and, like other plasma products, carries the possibility for transmission of blood-borne viral agents, and theoretically, the Creutzfeldt-Jakob disease (CJD) agent. The risk of transmission of recognized blood-borne viruses is considered to be low because of the viral inactivation and removal properties in the Cohn-Oncley cold ethanol precipitation procedure used for purification of immune globulin products.13-15 Until 1993, cold ethanol manufactured immune globulins licensed in the United States had not been documented to transmit any viral agent. However, during a brief period in late 1993 to early 1994, intravenous immune globulin made by one U.S. manufacturer was associated with transmission of Hepatitis C virus.16 To further guard against possible transmission of blood-borne viruses, including Hepatitis C, CMV-IGIV is treated with a solvent detergent viral inactivation procedure17 known to inactivate a wide spectrum of lipid enveloped viruses, including HIV-1, HIV-2, Hepatitis B, and Hepatitis C.18 However, because new blood-borne viruses may yet emerge, some of which may not be inactivated by the manufacturing process or by solvent detergent treatment, CMV-IGIV, like any other blood product, should be given only if a benefit is expected. Immune Globulin Intravenous (Human) products have been reported to be associated with renal dysfunction, acute renal failure, osmotic nephrosis and death.6-8 Patients predisposed to acute renal failure include patients with any degree of pre-existing renal insufficiency, diabetes mellitus, age greater than 65, volume depletion, sepsis, paraproteinemia or patients receiving known nephrotoxic drugs. Especially in such patients, IGIV products should be administered at the minimum concentrations available and the minimum rate of infusion practical. While these reports of renal dysfunction and acute renal failure have been associated with the use of many IGIV products, those containing sucrose as a stabilizer (and given at daily doses of 350 mg/kg or greater) account for a disproportionate share of the total number. Cytogam® contains sucrose as a stabilizer. See PRECAUTIONS and DOSAGE AND ADMINISTRATION sections for important information intended to reduce the risk of acute renal failure. During administration, the patient’s vital signs should be monitored continuously and careful observation made for any symptoms throughout the infusion. Epinephrine should be available for the treatment of an acute anaphylactic reaction (see PRECAUTIONS
Cytogam® does not contain a preservative. The vial should be entered only once for administration purposes and the infusion should begin within 6 hours. The infusion schedule should be adhered to closely (see INFUSION section). Do not use if the Although systemic allergic reactions are rare (see ADVERSE REACTIONS section), epinephrine and diphenhydramine should be available for treatment of acute allergic symptoms. If hypotension or anaphylaxis occur, the administration of the immunoglobulin should be discontinued immediately and an antidote should be given as Renal Function:
Assure that patients are not volume depleted prior to the initiation of IGIV. Periodic monitoring of renal function tests and urine output is particularly important in patients judged to have a potential increased risk for developing acute renal failure. Renal function, including the measurement of blood urea nitrogen (BUN) or serum creatinine should be assessed prior to the initial infusion of Cytogam® and again at appropriate intervals thereafter. If renal function deteriorates, discontinuation of the product should be considered. For patients judged to be at risk for developing renal dysfunction, it may be prudent to reduce the amount of product infused per unit time. The recommended rate of Cytogam® infusion for prophylaxis of CMV disease in kidney transplant patients should NOT EXCEED 60 mg Ig/kg/hr (see DOSAGE AND ADMINISTRATION). Aseptic Meningitis Syndrome:
An aseptic meningitis syndrome (AMS) has been reported to occur infrequently in association with Immune Globulin Intravenous (Human) (IGIV) treatment.9-12 The syndrome usually begins within several hours to two days following IGIV treatment. It is characterized by symptoms and signs including severe headache, nuchal rigidity, drowsiness, fever, photophobia, painful eye movements, and nausea and vomiting. Cerebrospinal fluid studies are frequently positive with pleocytosis up to several thousand cells/mm3, predominantly from the granulocytic series, and elevated protein levels up to several hundred mg/dl. Patients exhibiting such symptoms and signs should receive a thorough neurological examination, including CSF studies, to rule out other causes of meningitis. AMS may occur more frequently in association with high dose (2 g/kg) IGIV treatment. Discontinuation of IGIV treatment has resulted in remission of AMS within several days without sequelae. Hemolysis:
Immune Globulin Intravenous (Human) (IGIV) products can contain blood group antibodies which may act as hemolysins and induce in vivo coating of red blood cells with immunoglobulin, causing a positive direct antiglobulin reaction and, rarely, hemolysis.19-21 Hemolytic anemia can develop subsequent to IGIV therapy due to enhanced RBC sequestration22 [See ADVERSE REACTIONS]. IGIV recipients should be monitored for clinical signs and symptoms of hemolysis [See PRECAUTIONS: Transfusion-Related Acute Lung Injury (TRALI):
There have been reports of noncardiogenic pulmonary edema [Transfusion-Related Acute Lung Injury (TRALI)] in patients administered IGIV.23 TRALI is characterized by severe respiratory distress, pulmonary edema, hypoxemia, normal left ventricular function, and fever and typically occurs within 1-6 hours after transfusion. Patients with TRALI may be managed using oxygen therapy with adequate ventilatory support. IGIV recipients should be monitored for pulmonary adverse reactions. If TRALI is suspected, appropriate tests should be performed for the presence of anti-neutrophil antibodies in both the product and patient serum [See PRECAUTIONS: Laboratory Thrombotic Events:
Thrombotic events have been reported in association with IGIV24-26 (See ADVERSE REACTIONS). Patients at risk may include those with a history of atherosclerosis, multiple cardiovascular risk factors, advanced age, impaired cardiac output, and/or known or suspected hyperviscosity. The potential risks and benefits of IGIV should be weighed against those of alternative therapies for all patients for whom IGIV administration is being considered. Baseline assessment of blood viscosity should be considered in patients at risk for hyperviscosity, including those with cryoglobulins, fasting chylomicronemia/ markedly high triacylglycerols (triglycerides), or monoclonal gammopathies [See PRECAUTIONS: Laboratory Tests]. Laboratory Tests:
If signs and/or symptoms of hemolysis are present after IGIV infusion, appropriate confirmatory laboratory testing should be done [See PRECAUTIONS]. If TRALI is suspected, appropriate tests should be performed for the presence of anti- neutrophil antibodies in both the product and patient serum [See PRECAUTIONS]. Because of the potentially increased risk of thrombosis, baseline assessment of blood viscosity should be considered in patients at risk for hyperviscosity, including those with cryoglobulins, fasting chylomicronemia/markedly high triacylglycerols (triglycerides), or monoclonal gammopathies [See PRECAUTIONS]. Drug Interactions:
Antibodies present in immune globulin preparations may interfere with the immune response to live virus vaccines such as measles, mumps, and rubella; therefore, vaccination with live virus vaccines should be deferred until approximately three months after administration of Cytogam®. If such vaccinations were given shortly after Cytogam®, a revaccination may be necessary. Admixtures of Cytogam® with other drugs have not been evaluated. It is recommended that Cytogam® be administered separately from other drugs or medications which the patient may be receiving (see Pregnancy Category C:
Animal reproduction studies have not been conducted with Cytomegalovirus Immune Globulin Intravenous (Human). It is also not known whether Cytomegalovirus Immune Globulin Intravenous (Human) can cause fetal harm when administered to a pregnant woman or can affect reproduction capacity. Cytomegalovirus Immune Globulin Intravenous (Human) should be given to a pregnant woman only if clearly needed. ADVERSE REACTIONS
Minor reactions such as flushing, chills, muscle cramps, back pain, fever, nausea, vomiting, arthralgia, and wheezing were the most frequent adverse reactions observed during the clinical trials of Cytogam®, Cytomegalovirus Immune Globulin Intravenous (Human). The incidence of these reactions during the clinical trials was less than 6.0% of all infusions and were most often related to infusion rates. If a patient develops a minor side effect, slow the rate immediately or temporarily interrupt the infusion. Increases in serum creatinine and blood urea nitrogen (BUN) have been observed as soon as one to two days following IGIV infusion. Progression to oliguria or anuria requiring dialysis has been observed. Types of severe renal adverse events that have been seen following IGIV therapy include acute renal failure, acute tubular necrosis, proximal tubular nephropathy and osmotic nephrosis.6-9 Severe reactions such as angioneurotic edema and anaphylactic shock, although not observed during clinical trials, are a possibility. Clinical anaphylaxis may occur even when the patient is not known to be sensitized to immune globulin products. A reaction may be related to the rate of infusion; therefore, carefully adhere to the infusion rates as outlined under “DOSAGE AND ADMINISTRATION”. If anaphylaxis or drop in blood pressure occurs, discontinue infusion and use antidote such as diphenhydramine and Postmarketing:
In addition to adverse events reported during clinical trials, the following events have been reported during the post-approval use of Cytogam®: Acute Respiratory Distress Syndrome (ARDS), cyanosis, pulmonary edema, dyspnea, cardiac arrest, circulatory collapse, hypotension, convulsions, bullous dermatitis, hemolysis, hepatic failure, and In addition to the adverse reactions seen with the use of Cytogam®, the following adverse reactions have been identified and reported during the post-approval use of Respiratory: Apnea, Transfusion Associated Lung Injury (TRALI), hypoxemia,
Cardiovascular: Thromboembolism
Neurological: Coma, loss of consciousness, tremor
Integumentary: Stevens-Johnson syndrome, epidermolysis, erythema multiforme
Hematologic: Pancytopenia, leukopenia, positive direct antiglobulin (Coombs) test
Because postmarketing reporting of these reactions is voluntary and the at-risk populations are of uncertain size, it is not always possible to reliably estimate the frequency of the reaction or establish a causal relationship to exposure to the product. Such is also the case with literature reports authored independently. SYMPTOMS OF OVERDOSAGE
Although little data are available, clinical experience with other immunoglobulin preparations suggests that the major manifestations would be those related to volume DOSAGE AND ADMINISTRATION
The maximum recommended total dosage per infusion is 150 mg Ig/kg, administered Within 72 hours of transplant: 150 mg/kg Preparation for Administration. Remove the tab portion of the vial cap and clean the rubber stopper with 70% alcohol or equivalent. DO NOT SHAKE VIAL; AVOID Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration whenever solution and container permit. Infuse the solution only if it is colorless, free of particulate matter and not turbid. Cytogam®, Cytomegalovirus Immune Globulin Intravenous (Human), does not contain a preservative. The vial should be entered only once for administration purposes. Infusion should begin within 6 hours after entering the vial and should be complete within 12 hours of entering the vial. Vital signs should be taken pre-infusion, mid-way and post-infusion as well as before any rate increase. Cytogam® should be administered through an intravenous line using an administration set that contains an in- line filter (pore size 15µ) and a constant infusion pump (i.e., IVAC pump or equivalent). A smaller in-line filter (0.2µ) is also acceptable. Pre-dilution of Cytogam® before infusion is not recommended. Cytogam® should be administered through a separate intravenous line. If this is not possible, Cytogam® may be "piggybacked" into a pre- existing line if that line contains either Sodium Chloride, Injection, USP, or one of the following dextrose solutions (with or without NaCl added): 2.5% dextrose in water, 5% dextrose in water, 10% dextrose in water, 20% dextrose in water. If a pre-existing line must be used, the Cytogam® should not be diluted more than 1:2 with any of the above- named solutions. Admixtures of Cytogam® with any other solutions have not been Initial Dose. Administer intravenously at 15 mg Ig per kg body weight per hour. If no adverse reactions occur after 30 minutes, the rate may be increased to 30 mg Ig/kg/hr; if no adverse reactions occur after a subsequent 30 minutes, then the infusion may be increased to 60 mg Ig/kg/hr (volume not to exceed 75 mL/hour). DO NOT EXCEED THIS RATE OF ADMINISTRATION. The patient should be monitored closely during Subsequent Doses. Administer at 15 mg Ig/kg/hr for 15 minutes. If no adverse reactions occur, increase to 30 mg Ig/kg/hr for 15 minutes and then increase to a maximum rate of 60 mg Ig/kg/hr (volume not to exceed 75 mL/hour). DO NOT
EXCEED THIS RATE OF ADMINISTRATION. The patient should be monitored closely Cytogam® should be used with caution in patients with pre-existing renal insufficiency and in patients judged to be at increased risk of developing renal insufficiency (including, but not limited to those with diabetes mellitus, age greater than 65, volume depletion, paraproteinemia, sepsis and patients receiving known nephrotoxic drugs). In these cases especially, it is important to assure that patients are not volume depleted prior to Cytogam® infusion. While most cases of renal insufficiency have occurred in patients receiving total doses of 350 mg Ig/kg or greater, no prospective data are presently available to identify a maximum safe dose, concentration or rate of infusion in patients determined to be at increased risk of acute renal failure. In the absence of prospective data, recommended doses should not be exceeded and the concentration and infusion rate selected should be the minimum practicable. Potential adverse reactions are: flushing, chills, muscle cramps, back pain, fever, nausea, vomiting, wheezing, drop in blood pressure. Minor adverse reactions have been infusion rate related - if the patient develops a minor side effect (i.e., nausea, back pain, flushing), slow the rate or temporarily interrupt the infusion. If anaphylaxis or drop in blood pressure occurs, discontinue infusion and use antidote such as To prevent the transmission of hepatitis viruses or other infectious agents from one person to another, sterile disposable syringes and needles should be used. The syringes and needles should not be reused. PHARMACEUTICAL INFORMATION
Cytogam®, Cytomegalovirus Immune Globulin Intravenous (Human), is an immunoglobulin G (IgG) product containing a standardized amount of antibody to Cytomegalovirus (CMV). Cytogam® is formulated in final vial as a sterile liquid. The globulin is stabilized with 5% sucrose and 1% Albumin (Human). Cytogam® contains no preservative. The purified immunoglobulin is derived from pooled adult human plasma selected for high titers of antibody for Cytomegalovirus (CMV).3 Source material for fractionation may be obtained from another U.S. licensed manufacturer. Pooled plasma was fractionated by ethanol precipitation of the proteins according to Cohn Methods 6 and 9, modified to yield a product suitable for intravenous administration. A widely utilized solvent-detergent viral inactivation process is also used.14 Certain manufacturing operations may be performed by other firms. Each milliliter contains: 50 ± 10 mg of immunoglobulin, primarily IgG, and trace amounts of IgA and IgM; 50 mg of sucrose; 10 mg of Albumin (Human). The sodium content is 20-30 mEq per liter; i.e. 1.0-1.5 mEq per 50 mL. The solution should appear colorless and translucent. Cytogam® is supplied in a single use vial and therefore, any product remaining after Stability and Recommendations. Cytogam® should be stored between 2-8°C (36-46°F) and used within 6 hours after entering the vial. The product is stable up to the expiration date which is stamped on the outer carton and vial label. It should not be AVAILABILITY OF DOSAGE FORMS
Cytogam®, Cytomegalovirus Immune Globulin Intravenous (Human), is supplied in a single use vial containing 2500 mg ± 500 mg of immunoglobulin. DIN 02231962. REFERENCES
1. Snydman, D.R., Werner, B.G., and Heinze-Lacey, B.H., et al. Use of
Cytomegalovirus Immune Globulin to prevent cytomegalovirus disease in renal transplant recipients. NEJM 317: 1049-1054, 1987. 2. Snydman, D.R., Werner, B.G., and Tilney, N.L., et al. A final analysis of primary
cytomegalovirus disease prevention in renal transplant recipients with a Cytomegalovirus Immune Globulin: Comparison of randomized and open-label trials. Transplant. Proceed. 23(1): 1357-1360, 1991. 3. Snydman, D.R., McIver, J., Leszczynski, J., et al. A pilot trial of a novel
Cytomegalovirus Immune Globulin in renal transplant recipients. Transplantation 38(5): 4. Ho, M., Suwansirikul, S., Dowling, J.N., et al. The transplanted kidney as a source of
cytomegalovirus infection. NEJM 293 (2): 1109-1112, 1975. 5. Werner, B.G., Snydman, D.R., Freeman, R., et al. Cytomegalovirus Immune Globulin
for the prevention of primary CMV disease in renal transplant patients: Analysis of usage under treatment IND status. Transplant. Proceed. 25(1): 1441-1443, 1993. 6. Cayco, A.V., Perazella M.A., Hayslett J.P. Renal insufficiency after intravenous
immune globulin therapy: A report of two cases and an analysis of the literature. J Am 7. Cantu, T.G., Hoehn-Saric, E.W., Burgess, K.M., et al. Acute renal failure associated
with immunoglobulin therapy. Am. J. Kidney Dis. 25: 228-234, 1995. 8. Hansen-Schmidt, S., Silomon, J., Keller, F. Osmotic nephrosis due to high-dose
immunoglobulin therapy containing sucrose (but not with glycine) in a patient with immunoglobulin a nephritis. Am. J. Kidney Dis. 28:451-453, 1996. 9. Sekul, E., Culper, E., Dalaks, M. Aseptic meningitis associated with high-dose
intravenous immunoglobulin therapy: Frequency and risk factors. Ann Int Med. 123: 10. Kato, E., Shindo, S., Eto, Y., Hashimoto, N., et al. Administration of immune globulin
associated with aseptic meningitis. JAMA. 3269-3270, 1988. 11. Casteels Van Daele, M., Wijndaele, L., Hunnick, K., et al. Intravenous
immunoglobulin and acute aseptic meningitis. N Engl J Med. 323(9): 614-615, 1990. 12. Scribner, C., Kapit, R., Philips, E., et al. Aseptic meningitis and intravenous
immunoglobulin therapy. Ann Intern Med. 121: 305-306, 1994. 13. Bossell, J. Safety of therapeutic immune globulin preparations with respect to
transmission of human T-lymphotropic virus type III/lymphadenopathy-associated virus infection. MMWR Vol. 35(14): 231-233, April 11, 1986. 14. Wells, M.A., Wittek, A.E., Epstein, J.S., et al. Inactivation and partition of human T-
cell lymphotropic virus, type III, during ethanol fractionation of plasma. Transfusion 15. McIver, J., Grady, G. Immunoglobulin preparations. In: Churchill, W.H. and Kurtz,
S.R., (ed): Transfusion Medicine. Boston: Blackwell; 1988. 16. Schneider, L., Geha, R. Outbreak of Hepatitis C associated with intravenous
immunoglobulin administration – United States, October 1993-June 1994. MMWR Vol. 17. Horowitz, B., Wiebe, M.E., Lippin, H. et al. Inactivation of viruses in labile blood
derivatives. Transfusion. 25: 516-522, 1985. 18. Edwards, C.A., Piet, M.P.J., Chin, S., Horowitz, B. Tri(n Butyl) phosphate detergent
treatment of licensed therapeutic and experimental blood derivatives. Vox Sang 52: 53- 19. Copelan EA, Strohm PL, Kennedy MS, Tutschka PJ. Hemolysis following
intravenous immune globulin therapy. Transfusion 1986; 26:410-412. 20. Thomas MJ, Misbah SA, Chapel HM, Jones M, Elrington G, Newsom-Davis J.
Hemolysis after high-dose intravenous Ig. Blood 1993; 15:3789. 21. Reinhart WH, Berchtold PE. Effect of high dose intravenous immunoglobulin
therapy on blood rheology. Lancet 1992; 339:662-664. 22. Kessary-Shoham H, Levy Y, Shoenfeld Y, Lorber M, Gershon H. In vivo
administration of intravenous immunoglobulin (IVIg) can lead to enhanced erythrocyte sequestration. J Autoimmune 1999; 13:129-135. 23. Rizk A, Gorson KC, Kenney L, Weinstein R. Transfusion-related acute lung injury
after the infusion of IVIG. Transfusion 2001; 41:264-268. 24. Dalakas MC. High-dose intravenous Immunoglobulin and serum viscosity: risk of
precipitating thromboembolic events. Neurology, 44: 223-226. 25. Woodruff RK, Grigg AP, Firkin FC, Smith IL. Fatal thrombotic events during
treatment of autoimmune thrombocytopenia with intravenous immunoglobulin in elderly 26. Wolberg AS, Kon RH, Monroe DM, Hoffman M. Coagulation factor XI is a
contaminant in intravenous immunoglobulin preparations. Am J Hematol 2000; 65:30- 27. Pierce LR, Jain N. Risks associated with the use of intravenous immunoglobulin.


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