Researchers demonstrated an adaptive feedback controller that measures drug concentrations in the living brain in real time, learns pharmacokinetics per subject on the fly, and holds drug levels near target. The approach reportedly delivers about twofold speed and precision gains over earlier population-based methods. The work is framed as a step toward “living” pharmacology systems that adjust dosing dynamically rather than relying solely on pre-set regimens and fixed PK/PD assumptions. For translational teams, the key promise is tighter exposure control, which can be critical when therapeutic windows are narrow or when brain penetration varies across individuals.