This trial is a randomized, double-blind, placebo-controlled clinical study conducted in treatment-experienced adults with NNRTI-resistant HIV-1, designed to preliminarily evaluate the efficacy, safety, and resistance profile of the core drug ACC017 in this population.
The study consists of two treatment phases: a functional monotherapy period (double-blind phase) and an extended optimized treatment period (open-label phase).
The first phase is the functional monotherapy period (W1-W2). After initial screening, eligible participants will return to the hospital on D1 for final eligibility review and baseline examinations. Those who pass the review will be randomized in a 2:1 ratio to either ACC017 tablets (N=8, 40 mg, once daily \[QD\]) or matching placebo (N=4), replacing the core NNRTI drug in the failing background regimen while maintaining the original backbone NRTIs unchanged. Treatment will continue for 2 weeks.
The second phase is the extended optimized treatment period (W3-W16). All participants who complete the functional monotherapy period will receive ACC017 tablets (40 mg QD) in combination with an optimized backbone regimen (i.e., ACC017 replaces the core NNRTI drug in the failing background regimen, while the investigator adjusts the backbone drugs based on HIV genotypic resistance test results to ensure at least one backbone NRTI remains sensitive, if applicable). Treatment will continue for 14 weeks.