Alprolix (factor IX recombinant, Fc fusion protein)

Dose (potency) of factor IX (recombinant), Fc fusion protein is expressed in terms of international units (IU, units) of factor IX activity. Potency is determined by an activated partial thromboplastin time (aPTT)-based one stage clotting assay calibrated against a standard established by the World Health Organization (WHO). Administration of 1 unit/kg of factor IX (recombinant), Fc fusion protein increases circulating levels of factor IX by approximately 1%.

No dosing information is available for this tab.

No dosing information is available for this tab.

No dosing information is available for this tab.

There is no enhanced messaging for this drug.

There are no contraindication interactions for this drug.

Severe Interaction: Action is required to reduce the risk of severe adverse interaction.

Factor Ix; Anti-Inhibitor Coagulant Conc/Antifibrinolytics

SEVERITY LEVEL: 2-Severe Interaction: Action is required to reduce the risk of severe adverse interaction.

MECHANISM OF ACTION: Concurrent use may result in additive or synergistic effects on the coagulation pathways.(1-3)

CLINICAL EFFECTS: Concurrent use may result in thrombosis.(1-3)

PREDISPOSING FACTORS: None determined.

PATIENT MANAGEMENT: The manufacturer of aminocaproic acid states that aminocaproic acid should not be administered concomitantly with Factor IX Complex concentrates or Anti-inhibitor Coagulant concentrates.(1) The US manufacturer of tranexamic acid states that concomitant use with Factor IX Complex concentrates or with Anti-inhibitor Coagulant concentrates should be avoided.(2,3) The Japanese manufacturer of tranexamic acid recommends caution when coadministered with drugs such as coagulation factor agents as coagulation may be further activated at sites with enhanced local fibrinolysis.(4) Concurrent use may be warranted in select patients with hemophilia A or hemophilia B or in select major trauma scenarios. Monitor patients closely for signs of thrombosis, disseminated intravascular coagulation, and hypercoagulability if concurrent use is deemed necessary.(5-13)

DISCUSSION: There is very limited data on the risk of thrombosis with combination therapy. In a study, eight hemophilia B patients undergoing dental extraction procedures received combination therapy with aminocaproic acid or tranexamic acid and monoclonal antibody purified factor IX for bleeding prophylaxis. All patients achieved hemostasis without clinical evidence of thrombosis as well as no changes were seen in hemoglobin, hematocrit, or in markers of hemostatic system activation.(5) In a study, seven hemophilia A patients with inhibitors and one with acquired hemophilia patient received activated prothrombin complex concentrate (APCC) and tranexamic acid for management of bleeding episodes and prevention of hemorrhage during surgery. Hemostatic outcomes were rated excellent or good in 10 out of 11 (91%) treatment episodes. No episodes of thrombosis or disseminated intravascular coagulation occurred during treatment.(6) A study in six hemophilia A patients and five healthy volunteers evaluated the use of tranexamic acid as an adjunct to APCC to control bleeding. Patients who received tranexamic acid had a significant increase in maximum clot firmness compared to healthy controls. No clinical or laboratory signs of thromboembolic events, disseminated intravascular coagulation, or hypercoagulability were observed.(7) In a retrospective cohort of 76 patients who received PCC for bleeding not caused by anticoagulation, some patients received additional hemostatic agents (protamine (59%), desmopressin (43%), and tranexamic acid (42%). Eight patients (11%) suffered thromboembolic complications but this was not stratified by the hemostatic agent.(8) In a prospective case crossover study, five healthy volunteers and six hemophilia patients with inhibitors received tranexamic acid with single-dose activated PCC or with recombinant activated factor VII. There were no thromboembolic events during the study.(9) In a double-blind, randomized, placebo-controlled superiority trial to investigate the efficacy and safety of 4-factor prothrombin complex concentrate (4F-PCC) administration in trauma patients at risk of massive transfusion, a significantly higher risk of thromboembolic events occurred in the 4F-PCC group compared to the placebo group (35% vs 24%; relative risk 1.48 [95% CI, 1.04-2.10]). This was observed despite more frequent use of tranexamic acid in the placebo group (86% vs 76%).(10) Case reports reviewed the use of recombinant factor VIIa and FEIBA in 4 patients with severe hemophilia with inhibitors who underwent major surgery. The patients were also treated with tranexamic acid. Non-surgical bleeding was encountered in 4 of 8 surgical procedures. The overall outcome was good for all procedures.(11) In a retrospective cohort of 112 ambulatory tooth extractions in 23 hemophilia patients using a coagulation factor replacement therapy in combination with tranexamic acid, only one episode of mild postoperative bleeding occurred after seven days in a patient who did not have good treatment compliance.(12) In a prospective study evaluating the use of initial hemoglobin levels as a guideline for the initial treatment of clotting disorders in multiple trauma patients, 25 patients received a combination of hemostatic agents (fibrinogen (100%), PCC (96%), desmopressin (56%), tranexamic acid (52%), and factor VIIa (44%). Of the 25 patients treated, 16 (64%) survived. Two patients (8%) suffered thromboembolic complications but this was not stratified by the hemostatic agent. One patient survived after developing a grade II pulmonary embolism caused by deep leg vein trombosis and one patient died from multi-organ failure after developing multiple small vessel thrombosis.(13)

Igg Antibodies And Derivatives/Efgartigimod-Alfa

SEVERITY LEVEL: 2-Severe Interaction: Action is required to reduce the risk of severe adverse interaction.

MECHANISM OF ACTION: The neonatal Fc receptor (FcRn) prevents catabolism and mediates recycling of IgG and albumin, which leads to their long persistence in the body.(1,2) Efgartigimod-alfa binds to FcRn and may decrease systemic exposure of other ligands of FcRn, like immunoglobulins and IgG-based antibodies.(3)

CLINICAL EFFECTS: The effectiveness of medicines that bind to FcRn may be decreased.(3)

PREDISPOSING FACTORS: None determined.

PATIENT MANAGEMENT: The manufacturer of efgartigimod-alfa states that efgartigimod-alfa should not be combined with long-term use of FcRn-binding medications. If the medication is essential for the patient, efgartigimod-alfa should be discontinued.(3)

DISCUSSION: Clinical drug interaction studies with efgartigimod-alfa have not been performed. Efgartigimod-alfa may decrease concentrations of compounds that bind to the human FcRn.(3)

Igg Antibodies And Derivatives/Nipocalimab-Aahu

SEVERITY LEVEL: 2-Severe Interaction: Action is required to reduce the risk of severe adverse interaction.

MECHANISM OF ACTION: The neonatal Fc receptor (FcRn) prevents catabolism and mediates recycling of IgG and albumin, which leads to their long persistence in the body.(1,2) Nipocalimab-aahu binds to FcRn and may decrease systemic exposure of other ligands of FcRn, like immunoglobulins and IgG-based antibodies.(3)

CLINICAL EFFECTS: The effectiveness of medicines that bind to FcRn may be decreased.(3)

PREDISPOSING FACTORS: None determined.

PATIENT MANAGEMENT: The manufacturer of nipocalimab-aahu states that nipocalimab-aahu should not be combined with long-term use of FcRn-binding medications. If the medication is essential for the patient, nipocalimab-aahu should be discontinued.(3)

DISCUSSION: Clinical drug interaction studies with nipocalimab-aahu have not been performed. Nipocalimab-aahu may decrease concentrations of compounds that bind to the human FcRn.(3)

Moderate Interaction: Assess the risk to the patient and take action as needed.

Igg Antibodies And Derivatives/Rozanolixizumab-Noli

SEVERITY LEVEL: 3-Moderate Interaction: Assess the risk to the patient and take action as needed.

MECHANISM OF ACTION: The neonatal Fc receptor (FcRn) prevents catabolism and mediates recycling of IgG and albumin, which leads to their long persistence in the body.(1,2) Rozanolixizumab-noli binds to FcRn and may decrease systemic exposure of other ligands of FcRn, like immunoglobulins and IgG-based antibodies.(3)

CLINICAL EFFECTS: The effectiveness of medications that bind to FcRn may be decreased.(3)

PREDISPOSING FACTORS: None determined.

PATIENT MANAGEMENT: The manufacturer of rozanolixizumab-noli states that concurrent use with medications that bind to the human neonatal Fc receptor (FcRn) should be closely monitored for reduced effectiveness of these medications. If long-term use of such medications is essential for the patient, consider discontinuing rozanolixizumab-noli and use alternative therapies.(3)

DISCUSSION: Clinical drug interaction studies with rozanolixizumab-noli have not been performed. Rozanolixizumab-noli may decrease concentrations of compounds that bind to the human FcRn.(3)

Known history of hypersensitivity (e.g., anaphylaxis) to factor IX (recombinant), Fc fusion protein or other components of the preparation.

There are no contraindication contraindications for this drug.

• Disseminated intravascular coagulation
• Thromboembolic disorder

There are no moderate contraindications for this drug.

The most common adverse effects observed in at least 1% of previously treated patients receiving factor IX (recombinant), Fc fusion protein in clinical trials were headache and oral paresthesia.

More Frequent

• Acute myocardial infarction
• Disseminated intravascular coagulation
• Pulmonary thromboembolism
• Thromboembolic disorder
• Thrombotic disorder

Less Frequent

• Anaphylaxis
• Urinary tract obstructive uropathy

Rare or Very Rare

• Hypersensitivity drug reaction
• Hypotension
• Renal colic

Less Frequent

• Chills
• Injection site sequelae
• Nausea
• Oral paresthesia

Rare or Very Rare

• Anorexia
• Dizziness
• Dysgeusia
• Fatigue
• Fever
• Halitosis
• Headache disorder
• Hematuria
• Lethargy
• Palpitations
• Paresthesia
• Urticaria

No enhanced messaging available.

The safety, efficacy, and pharmacokinetics of factor IX (recombinant), Fc fusion protein have been evaluated in previously treated patients 12-18 years of age in the principal efficacy study. The manufacturer states that findings from this study may be extrapolated and applied to patients younger than 12 years of age. In addition, the pharmacokinetics and safety of factor IX (recombinant), Fc fusion protein have been evaluated in a limited number of patients 2-11 years of age. Efficacy of the drug in patients younger than 2 years of age can be extrapolated from pharmacokinetic data. No specific safety issues have been identified in patients younger than 12 years of age.

Compared with adults and adolescents, patients younger than 12 years of age may have higher body weight-adjusted clearance, shorter half-life, and lower factor IX recovery; higher doses or more frequent dosing may be required. (See Dosage and Administration: Dosage.)

Category C. (See Users Guide.)

It is not known whether factor IX (recombinant), Fc fusion protein is distributed into human milk. Because many drugs are distributed into milk, the drug should be used with caution in nursing women.

Clinical studies of factor IX (recombinant), Fc fusion protein did not include sufficient numbers of patients 65 years of age and older to determine whether geriatric patients respond differently than younger patients.