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  • Title: Low Third-Trimester Serum Levels of Lamivudine/Zidovudine and Lopinavir/Ritonavir in an HIV-Infected Pregnant Woman with Gastric Bypass.
    Author: Michalik DE, Jackson-Alvarez JT, Flores R, Tolentino-Baldridge C, Batra JS.
    Journal: J Int Assoc Provid AIDS Care; 2015; 14(2):116-9. PubMed ID: 25361558.
    Abstract:
    Pharmacokinetics of lamivudine (3TC)/zidovudine (ZDV) and lopinavir/ritonavir (LPV/r) are described in a gravid 27-year-old HIV-infected woman with gastric bypass. Blood levels were obtained for these medications at time points 0 (predose) and 1, 2, 4, 6, 8, and 12 hours postdose. For these times, the levels (µg/mL) of 3TC were 0.0801, 0.69, 0.339, 0.237, 0.202, 0.108, and 0.0461; the levels of ZDV were 0.0153, 0.433, 0.0717, 0.0481, 0.0107, 0.0214, and 0.00864; the levels of lopinavir (LPV) were 2.45, 2.64, 1.95, 2.78, 3.83, 3.20, and 1.92; and the levels of ritonavir (RTV) were 0.09, 0.10, 0.07, 0.11, 0.15, 0.15, and 0.06. These data suggest that gastric bypass affected these antiretroviral drug levels. A functional, intact small bowel is responsible for absorption of these medications.
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