| Severe Combined Immunodeficiency
Gammagard Liquid vs Xembify
Side-by-side clinical, coverage, and cost comparison for severe combined immunodeficiency.Deep comparison between: Gammagard Liquid 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 Gammagard Liquid based on FDA-approved prescribing information
Coverage gaps3 major payers require step therapy for Xembify but not Gammagard Liquid, including UnitedHealthcare
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Category
Gammagard Liquid
Xembify
At A Glance
IV infusion or SC injection
Every 3-4 weeks (IV) or weekly (SC)
Immune globulin 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
- Multifocal motor neuropathy
- Polyradiculoneuropathy, Chronic Inflammatory Demyelinating
- Primary immune deficiency disorder
- Congenital agammaglobulinemia
- Common Variable Immunodeficiency
- X-linked agammaglobulinemia
- Wiskott-Aldrich Syndrome
- Severe Combined Immunodeficiency
Dosing
Primary Immunodeficiency (IV) 300-600 mg/kg every 3-4 weeks by IV infusion; start at 0.5 mL/kg/hr, increase every 30 minutes if tolerated up to 5 mL/kg/hr.
Primary Immunodeficiency (SC) Initial dose 1.37 x previous IV dose divided by weeks between IV doses, given weekly; 20-30 mL/site at 20-30 mL/hr/site (>=40 kg) or 20 mL/site at 15-20 mL/hr/site (<40 kg).
Multifocal Motor Neuropathy 0.5-2.4 g/kg/month by IV infusion; start at 0.5 mL/kg/hr, may increase if tolerated up to 5.4 mL/kg/hr.
Chronic Inflammatory Demyelinating Polyneuropathy Induction 2 g/kg divided over 2-5 consecutive days, then maintenance 1 g/kg divided over 1-4 consecutive days every 3 weeks by IV infusion; start at 0.5 mL/kg/hr, may increase if tolerated up to 5.4 mL/kg/hr.
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
- Anaphylactic or severe systemic hypersensitivity to human immune globulin
- IgA deficiency with antibodies to IgA and 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%) - Primary Immunodeficiency (IV) Headache, fatigue, pyrexia, nausea, chills, rigors, pain in extremity, diarrhea, migraine, dizziness, vomiting, cough, urticaria, asthma, pharyngolaryngeal pain, rash, arthralgia, myalgia, edema peripheral, pruritus, cardiac murmur
Most common (>=5%) - Primary Immunodeficiency (SC) Infusion site events, headache, fatigue, heart rate increased, pyrexia, abdominal pain upper, nausea, vomiting, asthma, blood pressure systolic increased, diarrhea, ear pain, aphthous stomatitis, migraine, oropharyngeal pain, pain in extremity
Most common (>=5%) - Multifocal Motor Neuropathy Headache, chest discomfort, muscle spasms, muscular weakness, nausea, oropharyngeal pain, pain in extremity
Most common (>=5%) - Chronic Inflammatory Demyelinating Polyneuropathy Headache, pyrexia, anemia, leukopenia, neutropenia, illness, blood creatinine increased, dizziness, migraine, somnolence, tremor, nasal dryness, abdominal pain upper, vomiting, chills, nasopharyngitis, pain in extremity
Serious Aseptic meningitis (IV for PI), pulmonary embolism, blurred vision (MMN)
Postmarketing Hemolysis, anaphylactic shock, cerebrovascular accident, transient ischemic attack, tremor, myocardial infarction, deep vein thrombosis, hypotension, pulmonary embolism, pulmonary edema, hyperhidrosis, chest pain, transfusion-related acute lung injury, hypersensitivity, myalgia, chills
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
GAMMAGARD LIQUID supplies a broad spectrum of opsonizing and neutralizing IgG antibodies against bacterial and viral agents and contains antibodies that interact with immune system cells; the mechanism in CIDP may include immunomodulatory effects.
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
Gammagard Liquid
- Covered on 5 commercial plans
- PA (9/12) · Step Therapy (9/12) · Qty limit (0/12)
Xembify
- Covered on 5 commercial plans
- PA (9/12) · Step Therapy (5/12) · Qty limit (0/12)
UnitedHealthcare
Gammagard Liquid
- Covered on 4 commercial plans
- PA (1/8) · Step Therapy (0/8) · Qty limit (0/8)
Xembify
- Covered on 4 commercial plans
- PA (1/8) · Step Therapy (0/8) · Qty limit (0/8)
Humana
Gammagard Liquid
- 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 Gammagard Liquid.
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.