Coagadex

1 INDICATIONS AND USAGE COAGADEX, Coagulation Factor X (Human), is a plasma-derived human blood coagulation Factor indicated in adults and children with hereditary Factor X deficiency for: Routine prophylaxis to reduce the frequency of bleeding episodes On-demand treatment and control of bleeding episodes Perioperative management of bleeding in patients with mild, moderate, and severe hereditary Factor X deficiency COAGADEX, Coagulation Factor X (Human), is a plasma-derived human blood coagulation factor indicated in adults and children with hereditary Factor X deficiency for: Routine prophylaxis to reduce the frequency of bleeding episodes ( 1 ) On-demand treatment and control of bleeding episodes ( 1 ) Perioperative management of bleeding in patients with mild, moderate and severe hereditary Factor X deficiency ( 1 )

2 DOSAGE AND ADMINISTRATION For intravenous use after reconstitution only For intravenous use only after reconstitution. Each vial of COAGADEX contains the labeled amount of Factor X in international units (IU) ( 2 ) The dosage and duration of treatment depend on the severity of the Factor X deficiency, the location and extent of the bleeding and the patient's clinical condition ( 2.1 ) For prophylaxis of bleeding episodes ( 2.1 ): Age Initial dose Further management Children: Less than 12 years of age 40 IU/kg twice weekly Monitor trough blood levels of Factor X targeting ≥5 IU/dL and adjust dosage to clinical response and trough levels. Do not exceed a peak level of 120 IU/dL. Adults and adolescents: 12 years of age or older 25 IU/kg twice weekly For treatment of bleeding episodes ( 2.1 ): Age Initial dose Further management Children: Less than 12 years of age 30 IU/kg Infuse at first sign of bleeding. Repeat at intervals of 24 hours until the bleed stops. Adults and adolescents: 12 years of age or older 25 IU/kg For perioperative management ( 2.1 ): Age Initial dose Further management Children: Less than 12 years of age Use a factor of 0.6 to calculate the required dose Pre-surgery: raise plasma Factor X levels to 70-90 IU/dL. Post-surgery: maintain plasma Factor X levels at ≥50 IU/dL until the patient is no longer at risk of bleeding due to surgery. Dose (IU) = body weight (kg) × desired factor X rise † (IU/dL or % of normal) × 0.6 Adults and adolescents: 12 years of age or older Use a factor of 0.5 to calculate the required dose Dose (IU) = body weight (kg) × desired factor X rise ‡ (IU/dL or % of normal) × 0.5 2.1 Dose Dose and duration of the treatment depend on the severity of the Factor X deficiency, location and extent of the bleeding, the patient's age (<12 years or >12 years) and the patient's clinical condition. Base the dose and frequency on the individual clinical response. Do not administer more than 60 IU/kg daily. Each vial of COAGADEX is labeled with the actual Factor X potency/content in International Units (IU). Prophylaxis of bleeding episodes Age Initial dose Further management Children: Less than 12 years of age 40 IU/kg twice weekly Due to inter-and intra-patient variability, it is recommended that trough blood levels of Factor X should be monitored at intervals, especially in the first weeks of therapy or after dosages changes. Adjust dosage regimen to clinical response and trough levels of Factor X of at least 5 IU/dL. Do not exceed a peak level of 120 IU/dL. [For more detailed calculations of dose, see Detailed Dose Calculation (2.1) ] . Adults and adolescents: 12 years of age or older 25 IU/kg twice weekly On–demand treatment and control of bleeding episodes Age Initial dose Further management Children: Less than 12 years of age 30 IU/kg Infuse COAGADEX when the first sign of bleeding occurs [see Clinical Trial Experience (6.1) ] . Repeat at intervals of 24 hours until the bleed stops. [For more detailed calculations of dose, see Detailed Dose Calculation (2.1) ] . Adults and adolescents: 12 years of age or older 25 IU/kg Perioperative management of bleeding Age Initial dose Further management Children: Less than 12 years of age Use a factor of 0.6 to calculate the required dose Measure post-infusion plasma Factor X levels for each patient before and after surgery to ensure that hemostatic levels are obtained and maintained. Pre-surgery : calculate the dose of COAGADEX to raise plasma Factor X levels to 70-90 IU/dL Post-surgery : Repeat dose as necessary to maintain plasma Factor X levels at a minimum of 50 IU/dL until the patient is no longer at risk of bleeding due to surgery Dose (IU) = body weight (kg) × desired factor X rise † (IU/dL or % of normal) × 0.6 Adults and adolescents: 12 years of age or older Use a factor of 0.5 to calculate the required dose Dose (IU) = body weight (kg) × desired factor X rise ‡ (IU/dL or % of normal) × 0.5 Detailed Dose Calculation For young children (less than 12…

5 WARNINGS AND PRECAUTIONS Hypersensitivity reactions, including anaphylaxis, are possible. Should symptoms occur, discontinue COAGADEX and administer appropriate treatment ( 5.1 ). Development of neutralizing antibodies (inhibitors) may occur. If expected plasma Factor X activity levels are not attained, or if bleeding is not controlled with an appropriate dose, perform an assay that measures Factor X inhibitor concentration ( 5.2 ). COAGADEX is made from human blood and therefore carries a risk of transmitting infectious agents, e.g. viruses, the variant Creutzfeldt-Jakob disease (vCJD) agent and, theoretically, the Creutzfeldt-Jakob disease (CJD) agent ( 5.4 ). 5.1 Hypersensitivity Reactions Allergic type hypersensitivity reactions, including anaphylaxis, are possible. Early signs of hypersensitivity reactions including angioedema, infusion site inflammation (e.g. burning, stinging, erythema), chills, cough, dizziness, fever, flushing, generalized urticaria, headache, hives, hypotension, lethargy, musculoskeletal pains, nausea, pruritus, rash, restlessness, tachycardia, tightness of the chest, tingling, vomiting, wheezing. If hypersensitivity symptoms occur, discontinue use of the product immediately and administer appropriate emergency treatment. COAGADEX contains traces of human proteins other than Factor X. 5.2 Neutralizing Antibodies The formation of neutralizing antibodies (inhibitors) to Factor X may occur. Monitor all patients treated with COAGADEX for the development of inhibitors by appropriate clinical observations and laboratory tests. If expected Factor X activity levels are not attained, or if bleeding is not controlled with an expected dose, perform an assay that measures Factor X inhibitor concentration. 5.3 Transmissible Infectious Agents As COAGADEX is made from human blood, it may carry a risk of transmitting infectious agents, e.g. viruses, the variant Creutzfeldt-Jakob disease (vCJD) agent and, theoretically, the Creutzfeldt-Jakob disease (CJD) agent. There is also the possibility that unknown infectious agents may be present in the product. The risk that the product will transmit viruses has been reduced by screening plasma donors for prior exposure to certain viruses, by testing for the presence of certain current virus infections, and by inactivating and removing certain viruses during manufacture. Despite these measures, this product may still potentially transmit diseases. All infections suspected by a physician possibly to have been transmitted by this product should be reported by the physician or other healthcare providers to Kedrion Biopharma, Inc. at 1-855-3KDRION (1-855-353-7466) or US_Medicalinfo@kedrion.com 5.4 Monitoring and Laboratory Tests Monitor plasma Factor X activity by performing a validated test (e.g. one-stage clotting assay), to confirm that adequate Factor X levels have been achieved and maintained [ see Dosage and Administration (2) ]. Monitor for the development of Factor X inhibitors. Perform a Nijmegen-Bethesda inhibitor assay if expected Factor X plasma levels are not attained, or if bleeding is not controlled with the expected dose of COAGADEX. Use Nijmegen-Bethesda Units (BU) to report inhibitor levels.

4 CONTRAINDICATIONS COAGADEX is contraindicated in patients who have had life-threatening hypersensitivity reactions to COAGADEX [ see Description (11) ]. Do not use in patients who have had life-threatening hypersensitivity reactions to COAGADEX ( 4 ).

7 DRUG INTERACTIONS Drug interaction studies have not been performed. Use with caution in patients who are receiving other plasma products that may contain Factor X (e.g. fresh frozen plasma, prothrombin complex concentrates). Based on the mechanism of action, COAGADEX is likely to be counteracted by direct and indirect Factor Xa inhibitors [ see Clinical Pharmacology (12.1) ].

8.1 Pregnancy Risk Summary There is limited data with COAGADEX in pregnant women to inform on drug-associated risk. Animal reproduction studies have not been conducted using COAGADEX. It is not known whether COAGADEX can cause fetal harm when administered to a pregnant woman or can affect reproduction capacity. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2-4% and 15-20%, respectively.

6 ADVERSE REACTIONS The most common adverse drug reactions (frequency ≥ 5% of subjects) observed in clinical trials were infusion site erythema, infusion site pain, fatigue, and back pain. The most common adverse drug reactions (frequency ≥ 5% of subjects) observed in clinical trials were infusion site erythema, infusion site pain, fatigue and back pain ( 6 ). To report SUSPECTED ADVERSE REACTIONS, contact Kedrion Biopharma, Inc. at 1-855-3KDRION (1-855-353-7466) or the FDA at 1-800-FDA-1088 or www.fda.gov/medwatch 6.1 Clinical Trials Experience As clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trial of another drug and may not reflect the rates observed in clinical practice. During the clinical development of COAGADEX involving three multicenter, open-label, non-randomized clinical studies, 27 individual subjects with hereditary Factor X deficiency received at least one dose of COAGADEX. Sixteen subjects aged 12 to 58 years with moderate to severe hereditary Factor X deficiency (basal FX:C < 5 IU/dL) received doses of COAGADEX for pharmacokinetic evaluation, on-demand treatment for control of bleeding episodes, and/or perioperative management of minor surgical or dental procedures. A total of 468 infusions were administered, including 242 for on-demand treatment and control of bleeding episodes, 6 for perioperative management and 31 for PK assessments. Spontaneous, traumatic and menorrhagic bleeding episodes were treated with an on-demand dose of 25 IU/kg for up to 2 years. Two subjects aged 55 and 59 years with mild hereditary Factor X deficiency (basal FX:C 6 IU/dL and 8 IU/dL) received COAGADEX for perioperative management of four major surgical procedures. There were 40 exposure days to COAGADEX. Six adverse reactions were reported in 2 of the 18 subjects. These were infusion site erythema (2 reports in 1 subject [5.6%]), fatigue (2 reports in 1 subject [5.6%]), back pain (1 report [5.6%]) and infusion site pain (1 report [5.6%]). In a separate study, nine children (aged 2 to 11 years), of whom four were less than 6 years of age, received 537 (mean 59.7) doses of COAGADEX as routine prophylaxis of bleeding episodes during a period of at least 6 months. In addition, 22 infusions were given to treat a bleed, equivalent to 2.1 bleeds per subject per year. There were no adverse drug reactions in this study. 6.2 Immunogenicity Immunogenicity was evaluated in three studies and all subjects (adults and children) underwent Factor X inhibitor testing (inhibitor screen and Nijmegen-Bethesda assay) at baseline, end of study and at 3-monthly intervals in between. For subjects who underwent surgery, inhibitor testing was done pre-surgery and on discharge. All inhibitor tests were negative. Additionally, comparison of pharmacokinetic (PK) parameters at the repeat PK assessment with those at first dose did not suggest development of any inhibitors to Factor X. The detection of antibody formation is highly dependent on the sensitivity and specificity of the assay. Additionally, the observed incidence of antibody (including neutralizing antibody) positivity in an assay may be influenced by several factors including assay methodology, sample handling, timing of sample collection, concomitant medications, and underlying disease. For these reasons, it may be misleading to compare the incidence of antibodies to COAGADEX in the studies described above with the incidence of antibodies in other studies or to other products.