What is the key feature of transdermal medication administration?

The key feature of transdermal medication administration is the continuous slow absorption of medication. This method involves applying a drug to the skin via a patch or cream, allowing for a steady release of medication into the bloodstream over an extended period. This slow absorption provides consistent therapeutic levels of medication, which can be particularly advantageous for managing chronic conditions, reducing the frequency of dosing, and enhancing patient adherence to the treatment regimen.

In contrast, the immediate release of medication into the bloodstream, while beneficial in some situations, is not characteristic of transdermal methods, as they are designed for gradual absorption. Oral ingestion is a different route altogether and does not relate to transdermal administration, while topical application with minimal absorption typically refers to treatments that do not intend to enter systemic circulation like a transdermal patch does. Thus, the focus on continuous and controlled release of medication makes slow absorption the defining aspect of transdermal medication administration.