A laser-markable composition comprises a pigment, a solvent and a conductive polymer that absorbs IR radiation. The present therapy is compatible with the patients’ anti-cancer treatment. A first catalytic layer is formed on the monolithic substrate. The band-pass filter also includes a second plurality of transconductors, wherein the second plurality of transconductors receives a second voltage, where the second voltage controls the bandwidth of the band-pass filter. One or more eluting drugs are disposed adjacent to the high impedance electrode.