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What is Gammaplex?

Gammaplex is an IVIG product available in 5% and 10% formulations, manufactured by Bio Products Laboratory (BPL) and distributed by Kedrion. It is FDA-approved for primary humoral immunodeficiency, with the 5% formulation also approved for chronic ITP. The dual formulations support flexibility in infusion rate and patient tolerance.

What it treats

Gammaplex is FDA-approved for the following indications:

  • Primary humoral immunodeficiency
  • Chronic immune thrombocytopenic purpura (ITP) — 5% formulation

How it is administered

Gammaplex is administered intravenously every three to four weeks. The 5% formulation may be selected for patients who require slower infusion rates; the 10% allows shorter infusion times.

Patient assistance & support

The manufacturer offers a patient support program — BPL Patient Support — that can help with insurance navigation, copay assistance for eligible patients, nursing support, and ongoing education. More information is available at https://www.bpl-us.com.

Coordination at Optimed Immunology

Treatment with Gammaplex is initiated and monitored by Dr. McNeil. Prior authorizations are handled in-house — patients are not asked to navigate insurance approvals on their own. Infusion logistics are coordinated through trusted partner infusion providers — including Horizon Infusions, where the practice is co-located — or arranged for home infusion when appropriate. The team handles scheduling, nursing coordination, and prior-authorization renewals.

Important safety note: This page is not a substitute for the FDA prescribing information. Risks, contraindications, drug interactions, and required monitoring vary by patient. The official manufacturer website (https://www.gammaplex.com) provides the most current full prescribing and safety information. Treatment decisions and monitoring are individualized — please discuss with Dr. McNeil whether Gammaplex is appropriate for your situation.

Medically reviewed

Donald L. McNeil, MD · Board Certified in Allergy & Immunology and Internal Medicine

Last reviewed: November 2025 · Sources: FDA prescribing information · manufacturer label · AAAAI · ACAAI · relevant clinical guidelines

This page is provided for educational purposes only and is not medical advice. If you have an emergency, call 911.

Have questions about Gammaplex?

Treatment selection is a shared decision. Schedule a consultation with Dr. McNeil to discuss whether Gammaplex is appropriate for you.