ABSTRACT
In modern medicine, consultation with a physician results more often than not in a drug prescription. Prescribing a drug does not ensure optimal intake, however. Most readers will have at least some experience with a drug regimen, and chances are one can recall that during the execution phase of such a prescribed regimen one or more doses were omitted, or that the timing of the ingestion of the drug was not quite as prescribed. This phenomenon is known as variable patient compliance, and this chapter will review various aspects associated with this phenomenon.
