a) providing a course of treatment for a subject, which course includes periodically administering an amount of medicine to the subject, which amount of medicine includes a dose of at least one active pharmacological agent (APA) and an amount of at least one non-active pharmacological agent (NPA), which NPA provides at least one non-visual sensory cue and b) varying the dosage amount of the APA within the periodically administered amount of medicine, while the amount of the NPA contained within each periodically administered amount of medicine is provided at a level that maintains the sensory cue at a substantially constant level.
