The method of drug delivery that ensures slower, more controlled absorption via the skin is known as what?

The method of drug delivery that ensures slower, more controlled absorption via the skin is known as transdermal or topical delivery. This approach involves applying a drug formulation to the surface of the skin, where it is absorbed into the bloodstream over time.

Transdermal delivery allows for a steady release of medication, which can result in more consistent therapeutic levels in the body compared to other methods that may cause peaks and troughs in drug concentrations. The use of patches, for example, exemplifies transdermal drug delivery, as they can provide continuous medication release for an extended period, such as 24 hours or longer. This method is particularly advantageous for medications that have a short half-life or require steady dosing.

Other methods, such as intramuscular or oral delivery, are typically associated with faster absorption and may not provide the same level of control over the duration and rate of release into the bloodstream. Rectal administration also serves specific purposes but does not offer the controlled, sustained absorption characteristic of transdermal systems.