Background and Objectives: Antiretroviral therapy (ART) has revolutionized the management of HIV infection, transforming it from a once-debilitating disease to a chronic, manageable condition. However, challenges such as treatment resistance, medication side effects, and long-term tolerability persist, prompting the exploration of novel therapeutic approaches. We aimed to highlight the characteristics and related comorbidities of HIV/AIDS cases in which the antiretroviral therapy was modified. Material and Methods: A cross-sectional clinical investigation was conducted on adults diagnosed with HIV/AIDS who were hospitalized at the "St. Parascheva" Clinical Hospital of Infectious Diseases in Iasi in the Northeastern region of Romania. The timeframe under investigation was 1 January 2023 to 30 June 2023. Results: In the Northeastern part of Romania, from a total of 1692 patients in the active records, there were a total of 148 recorded cases of antiretroviral therapy switch in HIV-infected patients. The main reason for the ART switch was the simplification of the ART regimen (82 cases, 55.40%), viro-immunological failure (16 cases, 10.66%), other disturbances correlated to the ART regimen, dyslipidemia (34 cases 22.97%), depression (3 cases, 2.02%), suicide attempt (1 case, 0.67%), new situations, including the appearance of pregnancy (3 cases 2.02%), and tuberculosis (9 cases, 6.08%). ART before the switch was represented by protease inhibitors that accounted for 84 cases (56.75%) of the ART switch. Following the therapy switch, integrase inhibitor-based ART single-tablet regimens accounted for 43.91% (65 cases) of all changeovers, with non-nucleoside reverse transcriptase inhibitor regimens coming in second, in 63 cases, 42.66%. Conclusions: ART switch as an experimental therapy offers a promising approach to optimizing HIV treatment outcomes. By focusing on viral suppression and immune reconstitution, addressing treatment challenges, and exploring novel ARV agents, ART switch strategies aim to improve the overall health and well-being of individuals living with HIV.

Keywords: ART switch; HIV infection; HIV-AIDS; treatment-experienced patients.