| Immune thrombocytopenic purpura
Gammaplex vs Rhophylac
Side-by-side clinical, coverage, and cost comparison for immune thrombocytopenic purpura.Deep comparison between: Gammaplex vs Rhophylac 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 signalsRhophylac has a higher rate of injection site reactions vs Gammaplex based on FDA-approved prescribing information
Coverage gaps3 major payers require step therapy for Rhophylac but not Gammaplex, including UnitedHealthcare
Sign up to reveal the full AI analysis
Category
Gammaplex
Rhophylac
At A Glance
IV infusion
Every 3-4 weeks
Immune globulin (IgG replacement)
IV or IM injection
Single dose
Rh(D) immune globulin
Indications
- Common Variable Immunodeficiency
- X-linked agammaglobulinemia
- Congenital agammaglobulinemia
- Wiskott-Aldrich Syndrome
- Severe Combined Immunodeficiency
- Immune thrombocytopenic purpura
- Rh Isoimmunization
- Immune thrombocytopenic purpura
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.
Rh Isoimmunization 300 mcg (1500 IU) IV or IM injection; routine antepartum prophylaxis at week 28-30 of pregnancy; postpartum and obstetric complication doses within 72 hours of event; for excessive fetomaternal hemorrhage (>15 mL fetal RBCs), 300 mcg plus 20 mcg per mL fetal RBCs in excess of 15 mL; for incompatible transfusions, 20 mcg per 2 mL Rh(D)-positive whole blood within 72 hours of exposure.
Immune thrombocytopenic purpura 50 mcg per kg body weight by IV route only, administered at a rate of 2 mL per 15 to 60 seconds.
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 to IgA and history of hypersensitivity to RHOPHYLAC or any of its components
- Newborn infant of a mother who received RHOPHYLAC postpartum
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 - Rh Isoimmunization (>=0.5%) Nausea, dizziness, headache, injection-site pain, malaise
Most common - Immune thrombocytopenic purpura (>14%) Chills, pyrexia/increased body temperature, increased blood bilirubin, headache
Serious Intravascular hemolysis, clinically compromising anemia, acute renal insufficiency, DIC (observed in ITP treatment)
Postmarketing Hypersensitivity reactions including anaphylactic shock, headache, dizziness, vertigo, hypotension, tachycardia, dyspnea, nausea, vomiting, rash, erythema, pruritus, chills, pyrexia, malaise, diarrhea, back pain
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.
Rh(D) immune globulin (anti-D) that suppresses immunization to Rh(D)-positive RBCs by accelerating their clearance; in ITP, forms Rh(D) immune globulin-RBC complexes preferentially removed by the reticuloendothelial system, causing Fc receptor blockade that spares antibody-coated platelets.
Enter your patient's insuranceCheck specific coverage details for your patient.
Most Common Insurance
Anthem BCBS
Gammaplex
- Covered on 5 commercial plans
- PA (10/12) · Step Therapy (10/12) · Qty limit (0/12)
Rhophylac
- Covered on 5 commercial plans
- PA (5/12) · Step Therapy (0/12) · Qty limit (10/12)
UnitedHealthcare
Gammaplex
- Covered on 4 commercial plans
- PA (1/8) · Step Therapy (1/8) · Qty limit (0/8)
Rhophylac
- Covered on 4 commercial plans
- PA (0/8) · 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)
Rhophylac
- Covered on 0 commercial plans
- PA (1/3) · Step Therapy (0/3) · Qty limit (0/3)
Coverage data sourced from MMIT. Updated monthly.
Savings
No savings programs available for Gammaplex.
Cost estimate not availableAssistance Fund: Thrombocytopenia
Commercial or private insurance
Medicare, Medicaid, VA, TRICARE
Compare Other Drugs
Let us handle your prior authsJust enter your patient's info and we'll:
- Verify eligibility with the payer.
- Pull the right PA forms directly from the payer.
- Submit, track & send live updates to your dashboard.
Free to start · HIPAA compliant
Next Steps for Your Patient
GammaplexView full Gammaplex profile
RhophylacView full Rhophylac profile
Clinical data sourced from FDA-approved labeling. Coverage data via MMIT. Updated monthly.