What characteristic is NOT typically associated with controlled release systems?

Controlled release systems are designed to release a drug at a predetermined rate over an extended period of time, which provides several advantages in therapeutic applications. One of the main goals of these systems is to maintain consistent drug levels in the bloodstream, minimizing fluctuations that can lead to sub-therapeutic or toxic effects.

The characteristic that is not typically associated with controlled release systems is ensuring rapid drug absorption. Controlled release formulations focus on sustaining and regulating the release of the drug rather than facilitating quick absorption. In fact, many controlled release systems are engineered to slow down the release of the drug to allow for more extended therapeutic effects and to avoid sharp peaks in drug concentration. Rapid absorption can lead to undesirable effects, such as toxicity or ineffective treatment due to an immediate release of a large amount of the drug.

In summary, controlled release systems prioritize steady drug delivery and maintaining therapeutic levels over rapid absorption, which is why the characteristic of ensuring rapid drug absorption does not align with the fundamental principles of these systems.