JOURNAL ARTICLE
REVIEW
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Ibalizumab: The First Monoclonal Antibody for the Treatment of HIV-1 Infection.

OBJECTIVE: To review the efficacy and safety of ibalizumab (IBA) in the treatment of HIV-1 infection.

DATA SOURCES: A literature search was performed using PubMed and Google Scholar (2010 to mid-June 2020) with the search terms TMB-355, TNX-355 , and ibalizumab . Other resources included abstracts presented at recent conferences and the manufacturer's website and prescribing information.

STUDY SELECTION AND DATA EXTRACTION: All relevant English-language articles of studies assessing the efficacy and safety of IBA were included.

DATA SYNTHESIS: IBA is a monoclonal antibody that blocks HIV-1 from infecting CD4+ T cells. IBA is approved by the Food and Drug Administration, in combination with other antiretrovirals (ARVs), for the treatment of HIV-1 infection in heavily treatment-experienced adults with multidrug-resistant (MDR) HIV-1 infection failing their current ARVs. IBA demonstrated significant and sustained antiviral activity in patients with MDR HIV-1 infection who had advanced disease and limited treatment options. It carries a warning regarding the development of immune reconstitution inflammatory syndrome. Common adverse reactions include diarrhea, dizziness, nausea, and rash.

RELEVANCE TO PATIENT CARE AND CLINICAL PRACTICE: IBA represents an attractive option for treatment-experienced adults with advanced HIV-1 infection who are no longer able to achieve viral suppression on oral ARV therapy alone and who are able to adhere to an infusion therapy every 2 weeks. As with other biologics, there is a potential for the development of antibodies to IBA that can compromise its efficacy and safety.

CONCLUSION: IBA provides a needed treatment option to achieve and maintain viral suppression in heavily treatment-experienced adults with MDR HIV-1 infection.

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