HIV Infections Clinical Trial
Official title:
A Phase II Pharmacokinetic Study of the Transdermal Contraceptive System and Oral Contraceptive in HIV-1 Infected Women on Lopinavir/Ritonavir
The purpose of this study is to examine the drug interactions between a protease inhibitor (PI)-based regimen including lopinavir/ritonavir (LPV/r) and two forms of contraceptive medications in HIV infected women.
Both PIs and oral contraceptives are metabolized by the same pathway, which significantly decreases the effectiveness of oral contraceptives and limits the contraceptive choices available to HIV infected women. More effective hormonal contraceptive methods are necessary for preventing unintended pregnancy in women taking highly active antiretroviral therapy (HAART). Ortho Evra is a contraceptive patch that was approved by the FDA in 2001; it uses a transdermal contraceptive system, and higher rates of compliance have been associated with its use, compared to oral contraceptives. Because Ortho Evra is administered as a contraceptive patch worn on the skin, it may bypass the metabolic pathway common to both PIs and oral contraceptives, making it a viable contraceptive option for HIV infected women on PI-based regimens. The purpose of the study is to examine the interaction between a PI-based regimen containing LPV/r and two forms of contraceptive medications, Ortho Evra and an oral contraceptive, Ortho Novum (ON 1/35), in HIV infected women. Participants will be enrolled in this study for 6 weeks and will be assigned to one of two study arms, depending on their HAART regimen at study entry. Participants in both arms will also be stratified by age. Arm A participants will receive 400 mg/100 mg LPV/r twice daily along with two or more nucleoside reverse transcriptase inhibitors (NRTIs). Arm B participants will receive a regimen containing only NRTIs or no HAART. HAART will not be provided by this study. All patients will receive a single dose of ON 1/35 on Day 1 and will start the Ortho Evra contraceptive patch on Day 3. A physical exam, pap smear, pregnancy test, viral load test, CD4 and CD8 counts, and blood collection will occur at or before study entry and on Day 24. Pharmacokinetic analyses will occur on Days 1 through 3, 17 through 19, and 24. ;
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