Which term reflects the process that allows drugs to move from administration into the bloodstream?

The term that describes the process allowing drugs to move from administration into the bloodstream is absorption. This process involves the transfer of a drug from its site of administration into the circulation, thus making it available for therapeutic effect. Absorption can occur through various routes, such as oral, intravenous, subcutaneous, and intramuscular, each with different mechanisms influencing the rate and extent of drug uptake.

In the context of pharmacology, absorption is crucial because it is the first step that determines how much of the drug reaches systemic circulation and how quickly it can exert its effects. Factors that can influence absorption include the drug's formulation, solubility, route of administration, and the presence of food in the stomach. Understanding absorption is essential for optimizing drug therapy and ensuring that patients receive the intended dose effectively.