Which of the following are the four main processes of pharmacokinetics?

The four main processes of pharmacokinetics are indeed absorption, distribution, metabolism, and excretion.

Absorption refers to how a drug enters the bloodstream after administration. This process can vary significantly depending on the route of administration, such as oral, intravenous, or topical. Distribution describes the dispersion of the drug throughout the body's fluids and tissues, influenced by factors like blood flow, tissue permeability, and protein binding.

Metabolism, often occurring primarily in the liver, involves the chemical alteration of the drug, which can change its pharmacological effects or prepare it for elimination. Finally, excretion is the process through which the drug and its metabolites are eliminated from the body, primarily through the kidneys.

This understanding of pharmacokinetics is crucial in determining the appropriate dosing, frequency, and route of administration for medications to achieve the desired therapeutic effect while minimizing toxicity. The other options include terms that do not accurately reflect the established pharmacokinetic processes, such as synthesis and administration, which are not core components of pharmacokinetics.