In an electrically conductive lead adapted for implantation in a human or
animal body, and a method for making such a lead, a drug-dispensing
member is disposed at a distal end portion of the lead, at which an
electrode member is disposed that is adapted to emit and/or sense
electrical signals associated with medical therapy. The drug-dispensing
member has a configuration so that, after implantation, the amount of
drug released into the body per time unit is automatically controlled to
smoothly vary with time from al larger amount to a smaller amount in
accordance with a predetermined relationship of the amount of drug
released as a function of time.