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Just 2 months after the use of oral tenofovir was discontinued in the VOICE trial (JW AIDS Clin Care Oct 3 2011), study investigators have announced that the use of vaginal tenofovir gel is also being discontinued. The decision is based on an interim review at 2 years, showing similar rates of HIV acquisition in women assigned to a daily tenofovir-based vaginal microbicide and those assigned to placebo gel (6.0% and 6.1%, respectively). Notably, the review did not identify any safety concerns.
The VOICE trial originally included five study arms — oral tenofovir (Viread), oral tenofovir/FTC (Truvada), oral placebo, vaginal tenofovir gel, and vaginal placebo gel — with each intervention prescribed for daily use. About 1000 HIV-uninfected women…