Last update Sept. 21, 2023

Atazanavir Sulfate (ATV)

Low Risk

Possibly safe. Probably compatible. Mild risk possible. Follow up recommended. Read the Comment.

HIV protease inhibitor antiviral. Used alone or potentiated with Cobicistat or Ritonavir and associated with other antivirals to avoid the development of resistance in the treatment of HIV/AIDS. Oral administration in a daily dose.

It is excreted in breast milk in clinically insignificant amounts. (Spencer 2009)

It is used in infants from 3 months of age. (Kiser 2011)

"Individuals with HIV who are on ART with a sustained undetectable viral load and who choose to breastfeed should be supported in this decision". (Panel 2022 p ix)

See below the information of these related products:


We do not have alternatives for Atazanavir Sulfate (ATV).

Suggestions made at e-lactancia are done by APILAM team of health professionals, and are based on updated scientific publications. It is not intended to replace the relationship you have with your doctor but to compound it. The pharmaceutical industry contraindicates breastfeeding, mistakenly and without scientific reasons, in most of the drug data sheets.

Jose Maria Paricio, Founder & President of APILAM/e-Lactancia

Your contribution is essential for this service to continue to exist. We need the generosity of people like you who believe in the benefits of breastfeeding.

Thank you for helping to protect and promote breastfeeding.

José María Paricio, founder of e-lactancia.

Other names

Atazanavir Sulfate (ATV) in other languages or writings:


Atazanavir Sulfate (ATV) belongs to this group or family:


Variable Value Unit
Oral Bioavail. 60 - 68 %
Molecular weight 803 daltons
Protein Binding 86 %
pKa 11.92 -
Tmax 2 - 3 hours
7 - 8.6 hours
M/P ratio 0.07 - 0.09 -
Theoretical Dose 0.03 - 0.06 mg/Kg/d
Relative Dose 0.6 - 1.26 %


  1. Panel on Treatment of HIV During Pregnancy and Prevention of Perinatal Transmission. Recommendations for the Use of Antiretroviral Drugs During Pregnancy and Interventions to Reduce Perinatal HIV Transmission in the United States. Department of Health and Human Services. 2023 Consulted on June 16, 2023 Abstract Full text (link to original source)
  2. Kiser JJ, Rutstein RM, Samson P, Graham B, Aldrovandi G, Mofenson LM, Smith E, Schnittman S, Fenton T, Brundage RC, Fletcher CV. Atazanavir and atazanavir/ritonavir pharmacokinetics in HIV-infected infants, children, and adolescents. AIDS. 2011 Jul 31;25(12):1489-96. Abstract Full text (link to original source)
  3. Spencer L, Neely M, Mordwinkin N, et al. Intensive PK of zidovudine (AZT), lamivudine (3TC), and atazanavir (ATV) and HIV-1 viral load in breast milk and plasma in HIV+ women receiving HAART therapy. Presented at: 16th Conference on Retroviruses and Opportunistic Infections; Montreal, Canada. 8–11 February 2009. Abstract 942. 2009

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