Ibalizumab

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Information about Ibalizumab[edit source]

Ibalizumab is a humanized monoclonal antibody to CD4, the cell surface receptor for the HIV-1 envelope glycoprotein (gp120), which is used to treat patients with multidrug resistant HIV-1 infection.


Liver safety of Ibalizumab[edit source]

Ibalizumab therapy has not been associated with serum enzyme elevations or to instances of clinically apparent drug induced liver injury.

Mechanism of action of Ibalizumab[edit source]

Ibalizumab (eye' ba liz' ue mab) is a recombinant humanized monoclonal antibody to CD4, the cell surface receptor for the HIV-1 envelope glycoprotein 120 (gp120). Ibalizumab does not block the binding of gp120 to CD4 but rather inhibits the conformation changes in the CD4/gp120 complex that allows binding to a second cellular receptor, chemokine-receptor-4 (CXCR4), thus inhibiting HIV replication. Clinical trials of ibalizumab in heavily treatment-experienced HIV-positive patients with multidrug resistance have shown that it decreased HIV RNA levels and resulted in full suppression in over half of patients.

FDA approval information for Ibalizumab[edit source]

Ibalizumab was approved for use in the United States in 2018 for therapy (in combination with other antiretroviral agents) of patients with multidrug resistant HIV-1 infection.

Dosage and administration for Ibalizumab[edit source]

Ibalizumab is available in solution in single dose vials of 200 mg/1.33 mL under the brand name Trogarzo. Ibalizumab is administered as an intravenous infusion. The recommended dose is an initial loading dose of 2,000 mg followed by a maintenance dose of 800 mg every 2 weeks.

Side effects of Ibalizumab[edit source]

Side effects are generally mild and include injection site reactions, diarrhea, dizziness, nausea and rash. Rare but potentially severe adverse events include hypersensitivity reactions and immune reconstitution syndrome.

Antiviral agents[edit source]

Drugs for HIV Infection, in the Subclass Antiretroviral Agents

Drugs for Hepatitis B

Drugs for Hepatitis C

HCV NS5A Inhibitors

HCV NS5B (Polymerase) Inhibitors

HCV Protease Inhibitors

Combination Therapies

Drugs for Herpes Virus Infections (HSV, CMV, others)

Drugs for Influenza

Ibalizumab Resources

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Contributors: Prab R. Tumpati, MD