Recommendations for the Use of Antiretroviral Drugs in Pregnant Women with HIV Infection and Interventions to Reduce Perinatal HIV Transmission in the United States

The information in the brief version is excerpted directly from the full-text guidelines. The brief version is a compilation of the tables and boxed recommendations.

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Entry and Attachment Inhibitors

Ibalizumab-uiyk (Trogarzo, IBA)

Last Updated: December 24, 2019; Last Reviewed: December 24, 2019

Animal studies

Carcinogenicity and mutagenicity studies of IBA have not been conducted.1

Reproductive toxicology studies of IBA have not been conducted.1

Teratogenicity/Adverse Pregnancy Outcomes
Early embryonic development and embryo-fetal development studies with IBA have not been conducted.

Placental and Breast Milk Passage
No data are available on placental or breast milk passage of IBA in animals.

Human Studies in Pregnancy

No pharmacokinetic studies of IBA in pregnant women have been reported.

Placental and Breast Milk Passage
No data are available on placental or breast milk passage of IBA in humans. However, since monoclonal antibodies are transported across the placenta during pregnancy, IBA has the potential to be transmitted from the mother to the developing fetus. Human immunoglobulin G is also present in human milk, although published data indicate that antibodies in breast milk do not enter the neonatal or infant circulation system in substantial amounts.1

Teratogenicity/Adverse Pregnancy Outcomes
There are currently no data on the risk of birth defects in infants born to women who received IBA during pregnancy.

Excerpt from Table 8

Excerpt from Table 8
Generic Name
Trade Name
Formulation Dosing Recommendationsa Use in Pregnancy
IBA (Trogarzo):
  • Solution for IV infusion is available in single-dose vials
Standard Adult Dose:
  • IBA 2,000-mg loading dose, followed by IBA 800-mg maintenance doses administered every 2 weeks
PKs in Pregnancy:
  • No PK studies in human pregnancy.
Dosing in Pregnancy:
  • Insufficient data to make dosing recommendations.
No data available, but placental transfer of IBA, a monoclonal antibody, is possible.

Insufficient data to assess for teratogenicity in humans.
a Individual ARV drug doses may need to be adjusted in patients with renal or hepatic insufficiency (for details, see the Adult and Adolescent Antiretroviral Guidelines, Appendix B, Table 10).

Key: ARV = antiretroviral; IBA = ibalizumab; IV = intravenous; PK = pharmacokinetic


  1. Ibalizumab (Trogarzo) [package insert]. Food and Drug Administration. 2018. Available at:

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