Lenacapavir, also known as GS-6207, is an HIV-1 capsid inhibitor. It demonstrates an average EC50 of 50 pM (ranging from 20-160 pM) against 23 clinical isolates of HIV-1 from diverse subtypes, with tests performed in peripheral blood mononuclear cells (PBMCs). In vitro, Lenacapavir exhibits picomolar potency and shows no cross-resistance with existing antiretroviral compounds. Furthermore, Lenacapavir displays significant antiviral activity in individuals with HIV-1, regardless of prior treatment history, with no pre-existing resistance detected.