Medical devices and methods are provided for electrical stimulation of
neural tissue and controlled drug delivery to a patient. The device
includes an implantable drug delivery module which comprises a plurality
of reservoirs, a release system comprising at least one drug contained in
each of the reservoirs, and control means for selectively releasing a
pharmaceutically effective amount of drug from each reservoir; a neural
electrical stimulator which comprises a signal generator connected to at
least one stimulation electrode for operable engagement with a neural
tissue of the patient; and at least one microcontroller for controlling
operational interaction of the drug delivery module and the neural
electrical stimulator. The microcontroller may control the signal
generator and the control means of the drug delivery module. The device
may further include a sensor operable to deliver a signal to the
microcontroller, for example to indicate when to deliver electrical
stimulation, drug, or both.