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Gilead’s Once-Daily Single Tablet Regimen StribildTM Maintains High Viral Suppression Through Two Years Of Therapy Among Treatment-Naïve HIV Patients

Similarly, results from Study 103 show that 83 percent of Stribild patients (n=294/353) and 82 percent of patients receiving the atazanavir-based regimen (n=292/355) achieved HIV RNA < 50 copies/mL, based on the FDA snapshot algorithm (95 percent CI for the difference: -4.5 to +6.7 percent for Stribild vs. the atazanavir-based regimen; predefined criterion for non-inferiority was a lower bound of a two sided 95 percent CI of -12 percent).

In both Studies 102 and 103, rates of discontinuation due to adverse events were similar across all treatment groups (5 percent for Stribild in each study, 7 percent for Atripla and 6 percent for the atazanavir-based regimen). The most common adverse events occurring in at least 10 percent of Stribild patients in Study 102 were diarrhea, nausea, upper respiratory infection, headache, abnormal dreams, fatigue, depression and insomnia; in Study 103, they were diarrhea, nausea, upper respiratory infection, headache, nasopharyngitis, depression, back pain and fatigue. In Study 102, there were consistently higher reports at each study visit through 96 weeks of abnormal dreams and dizziness in the Atripla arm, with 14 percent and 4 percent of patients experiencing abnormal dreams and dizziness, respectively, on the Atripla arm vs. 8 percent and 1 percent, respectively on the Stribild arm at 96 weeks. Similarly, in Study 103, reports of diarrhea were consistently higher through 96 weeks of treatment on the atazanavir-based arm compared to Stribild, with 4 percent of Stribild patients vs. 9 percent of patients on an atazanavir-based regimen experiencing this problem at 96 weeks.

The frequency of Grade 3-4 adverse events and laboratory abnormalities was also comparable between study regimens. However, in Study 102, patients taking Stribild experienced lower rates of neuropsychiatric side effects (Grades 1-4) through 96 weeks compared to Atripla patients, including abnormal dreams (15 percent for Stribild vs. 28 percent for Atripla), dizziness (8 percent vs. 25 percent) and insomnia (11 percent vs. 16 percent). Patients taking Stribild also experienced lower increases in total cholesterol and LDL (low-density lipoprotein or “bad” cholesterol) compared to Atripla, and in Study 103, experienced significantly smaller increases in triglycerides compared to those taking the atazanavir-based regimen. Additionally, through week 96, reports of Grade 3-4 hyperbilirubinemia were lower in the Stribild arm compared to the atazanavir-based arm (0.6 percent vs. 65 percent).

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