Electrical treatment apparatus (100) for use with an associated molecule source, comprising: at least one electrode (106); a power source (120) for electrifying said at least one electrode; and a controller, which is programmed to activate the power source (120) to selectively electrify said at least one electrode (106) to apply at least one electric field including a transport effect for transporting a molecule in a desired manner and a non-excitatory control effect for controlling the activity of at least a part of a non-cardiac excitable tissue, said programming selected to achieve a desired provision of said molecule into said at least a part of an excitable tissue or associated vasculature, said desired provision being at least assisted by an interaction between the transport effect and the control effect.