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Co-formulated elvitegravir, cobicistat, emtricitabine, and tenofovir disoproxil fumarate (EVG/COBI/FTC/TDF; Stribild®) is a guideline-recommended regimen for HIV treatment-naïve patients and a switch option for virologically suppressed patients.The purpose of this analysis was to understand how HIV patients' symptoms change after switching to Stribild® versus continuing a regimen consisting of a non-nucleoside reverse transcriptase inhibitor (NNRTI) with emtricitabine and tenofovir disoproxil fumarate.A secondary analysis was conducted of the STRATEGY-NNRTI study (GS-US-236–0121), a randomized, open-label, phase IIIb trial of HIV-infected adults who were taking an NNRTI plus FTC/TDF and were randomly assigned (2:1) either to Stribild® (‘switch') or to continue on their existing regimen (‘no-switch'). Logistic regressions and longitudinal modeling were conducted to evaluate the relationship of treatment with bothersome symptoms. These models adjusted for age, sex, race, number of bothersome symptoms at baseline, Veterans Aging Cohort Study Risk (VACS) Index score, years since HIV diagnosis, and first antiretroviral therapy use, NNRTI type, serious mental illness, and baseline depression and health-related quality of life (HRQL) scores.At baseline, the prevalence of nightmares, vivid dreams, weird/intense dreams, muscle aches/joint pain, and fevers/chills/sweats was greater in the switch group. The prevalence of nightmare, vivid dreams, weird/intense dreams, dizzy/lightheadedness, fatigue/loss of energy, and pain/numbness/tingling in hands/feet deceased in the switch group at week 4, and these benefits were maintained over time. Nervous/anxious, drowsiness, trouble remembering, off balance, and body changes decreased in the switch group at week 4 but were not maintained over time. Difficulty sleeping, diarrhea/loose bowels, and bloating did not differ in prevalence at week 4 or 48, but longitudinal models suggested differences between groups over time. HRQL did not differ between groups and was unchanged over time.In this study sample, a switch to co-formulated EVG/COBI/FTC/TDF was associated with significant persistent improvements in six patient-reported HIV symptoms.