Safety and Acceptability Study of Non-occupational Prophylaxis (PEP) Following Potential Exposure to HIV

A Phase IV Open-label Evaluation of Safety, Tolerability and Patient Acceptance of Atazanavir Boosted With Ritonavir Combined With a Fixed-dose Formulation of Tenofovir DF and Emtricitabine for nPEP Following Potential Exposure to HIV-1

This study will evaluate how safe and tolerable a combination of taking three-drugs will be for the purpose of preventing HIV transmission after a high-risk sexual contact exposure in HIV uninfected adults.

Participants are given a regimen containing tenofovir disoproxil fumarate (TDF) 300mg and emtricitabine (FTC) 200mg fixed-dose combination tablet (TDF/FTC) once daily, and atazanavir, one 300mg tablet and one 100 mg ritonavir given once daily,for 28 days.

Inclusion Criteria:

1. Age of 18 at time of first visit.
2. HIV uninfected on the basis of a negative HIV Rapid Test
3. Possible non-occupational exposure to HIV-1, recent enough to permit receiving the first dose of study medication within 72 hours from the end of the exposure.

Exclusion Criteria:

1. Women who are actively trying to become pregnant.
2. Pregnancy and/or Breastfeeding.
3. Known self report of Chronic Hepatitis B infection or prior antiretroviral therapy for hepatitis B.
4. Known intolerance or allergy to study drugs.