[Controlled drug delivery systems. Paradigm change in pharmacology]

This article is to introduce the readers in the colourful world of controlled drug delivery. These structures are to carry the drug into the place of release for let it there out with proper velocity. So the aim of the researches are not to find the best drug, but to get it into the right place in the right time. Some controlled drug delivery processes are already in use. However it comes everyday a physical, chemical or biological idea for making a new style of controlled drug delivery system. This is the reason way we find this part of the pharmacology worth to the attention. We like to introduce it with short presenting of drug delivery systems, they classes, they working and the physical chemistry of drug release.