An electric motor has a rotor rotatable around a rotation axis and has a stator arranged around said rotor, which stator is equipped with poles. A superconducting DC bias coil encloses a limb) of the magnetic core for saturating each of the opposing limbs in opposite directions by the bias coil. The frame is formed by integral molding by casting. First wires are connected to first electrodes of the LED thin films. In the described preferred embodiment, the changeable-appearance substance released from the ampule is a chemiluminscent substance producing a chemiluminscent glow, but may be an effervescent substance to produce an ornamental effervescent appearance, or a color-changing substance to produce an indication of a previous opening of the device. The invention further relates to the use of the phytocannabinoid CBDV in combination with standard anti-epileptic drugs.