Abstract:
| ■ | The drug delivery system deals with the pharmaceutical formulation of the drug and the dynamic interactions among the drug, its formulation matrix, its container, and the physiologic milieu of the patient. These dynamic interactions are the subject of pharmaceutics. | ||||
| ■ | The pharmaceutical dosage form contains the active drug ingredient in association with nondrug (usually inert) ingredients (excipients). Together they form the vehicle, or formulation matrix. | ||||
| ■ | Drug absorption depends on the fraction of the un-ionized form of the drug in gastrointestinal fluids and tissue surfaces plus the surface area available for absorption. | ||||
