| Congenital agammaglobulinemia
Gammaplex vs Xembify
Side-by-side clinical, coverage, and cost comparison for congenital agammaglobulinemia.Deep comparison between: Gammaplex vs Xembify with Prescriber.AI
AI compares prescribing info and payer-specific access barriers across 1,200+ formularies. Here's a preview of what prescribers are already asking.Safety signalsXembify has a higher rate of injection site reactions vs Gammaplex based on FDA-approved prescribing information
Coverage gaps3 major payers require step therapy for Xembify but not Gammaplex, including UnitedHealthcare
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Category
Gammaplex
Xembify
At A Glance
IV infusion
Every 3-4 weeks
Immune globulin (IgG replacement)
SC injection
Daily to every 2 weeks
Immune globulin replacement
Indications
- Common Variable Immunodeficiency
- X-linked agammaglobulinemia
- Congenital agammaglobulinemia
- Wiskott-Aldrich Syndrome
- Severe Combined Immunodeficiency
- Immune thrombocytopenic purpura
- Primary immune deficiency disorder
- Congenital agammaglobulinemia
- Common Variable Immunodeficiency
- X-linked agammaglobulinemia
- Wiskott-Aldrich Syndrome
- Severe Combined Immunodeficiency
Dosing
Common Variable Immunodeficiency, X-linked agammaglobulinemia, Congenital agammaglobulinemia, Wiskott-Aldrich Syndrome, Severe Combined Immunodeficiency 300-800 mg/kg (3-8 mL/kg) IV every 3-4 weeks; initial infusion rate 0.5 mg/kg/min for 15 minutes, then increase gradually every 15 minutes to 8 mg/kg/min.
Immune thrombocytopenic purpura 1 g/kg (10 mL/kg) IV on 2 consecutive days (total dose 2 g/kg); initial infusion rate 0.5 mg/kg/min for 15 minutes, then increase gradually every 15 minutes to 8 mg/kg/min.
Primary immune deficiency disorder, Congenital agammaglobulinemia, Common Variable Immunodeficiency, X-linked agammaglobulinemia, Wiskott-Aldrich Syndrome, Severe Combined Immunodeficiency SC infusion only; treatment-naive: 150 mg/kg/day loading dose for 5 consecutive days, then 150 mg/kg/week maintenance starting Day 8; switching from IVIG: begin 1 week after last IVIG, initial weekly dose (g) = prior IVIG dose (g) x 1.37 / number of weeks between IVIG doses; switching from IGSC: administer same weekly dose (g) as prior IGSC; doses may be adjusted for frequent (2-7 times/week) or biweekly administration.
Contraindications
- Previous anaphylactic or severe systemic reaction to human immune globulin
- IgA deficiency with antibodies to IgA and a history of hypersensitivity
- Previous anaphylactic or severe systemic reaction to human immune globulin
- IgA deficiency with antibodies against IgA and history of hypersensitivity to human immune globulin treatment
Adverse Reactions
Most common (>=5%) in PI Headache, migraine, pyrexia
Most common (>=5%) in ITP Headache, vomiting, pyrexia, nausea, arthralgia, dehydration
Serious Thrombotic events, hemolysis; in ITP subjects: headache, vomiting, dehydration
Postmarketing Tachycardia, thromboembolism, hypertension, flushing, nausea, chills, chest discomfort, pyrexia, back pain, polymyositis, headache, dyspnea, rash, urticaria
Most common (>=5%) Infusion site erythema, infusion site pain, infusion site swelling, infusion site bruising, infusion site nodule, infusion site pruritus, infusion site induration, infusion site scab, infusion site edema, cough, diarrhea
Postmarketing Anaphylactic reaction, hypersensitivity, aseptic meningitis, dizziness, paresthesia, tachycardia, hypotension, dyspnea, chest discomfort, injection site reactions, chills, fatigue, pain, tremor, laryngospasm
Pharmacology
Polyclonal human IgG that provides replacement therapy for primary humoral immunodeficiency via a broad spectrum of opsonic and neutralizing IgG antibodies against pathogens and their toxins through antigen binding and effector functions; the mechanism of action in both PI and ITP has not been fully elucidated.
XEMBIFY supplies a broad spectrum of opsonizing and neutralizing IgG antibodies against bacterial, viral, parasitic, and mycoplasmal agents and their toxins, and contains antibodies capable of interacting with and altering the activity of immune system cells, though the full mechanism is not completely understood.
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Most Common Insurance
Anthem BCBS
Gammaplex
- Covered on 5 commercial plans
- PA (10/12) · Step Therapy (10/12) · Qty limit (0/12)
Xembify
- Covered on 5 commercial plans
- PA (9/12) · Step Therapy (5/12) · Qty limit (0/12)
UnitedHealthcare
Gammaplex
- Covered on 4 commercial plans
- PA (1/8) · Step Therapy (1/8) · Qty limit (0/8)
Xembify
- Covered on 4 commercial plans
- PA (1/8) · Step Therapy (0/8) · Qty limit (0/8)
Humana
Gammaplex
- Covered on 0 commercial plans
- PA (3/3) · Step Therapy (3/3) · Qty limit (0/3)
Xembify
- Covered on 0 commercial plans
- PA (3/3) · Step Therapy (1/3) · Qty limit (0/3)
Coverage data sourced from MMIT. Updated monthly.
Savings
No savings programs available for Gammaplex.
Cost estimate not availableAccessia Health: Primary Immune Deficiency - Private Insurance: Waitlist
Commercial or private insurance
Medicare, Medicaid, VA, TRICARE
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Clinical data sourced from FDA-approved labeling. Coverage data via MMIT. Updated monthly.