Maintenance darunavir/ritonavir monotherapy was effective in the prevention of perinatal HIV transmission in a recent study; however, about 10% of the cases required treatment intensification. Nucleoside reverse transcriptase inhibitors (NRTIs) are associated with drug-related toxicities in both fetal and neonatal stages. However, despite known toxicities, NRTIs are recommended for neonatal prophylaxis against HIV during pregnancy. ...