The tablets were exposed to an alternating magnetic field (AMF) using Magnetherm (Nanotherics Ltd., UK). They were placed on a glass petri dish inside a coil with nine windings and the nominal oscillation frequency was set to 588.5 kHz and the magnetic field intensity at 14 mT. The AMF exposure time was varied according to the DoE (Table ). The increase in tablet surface temperature in the AMF was measured using an IR thermal camera (Fluke Ti480 Pro, Fluke Europe, the Netherlands). A thermal image was taken every third second for the first three minutes, and thereafter every 30 seconds. The IR images were analyzed using SmartView 4.3 (Fluke Europe, the Netherlands).