Drug delivery systems are engineered technologies for the targeted delivery of any drug substance to the site of action where it’s actually needed. Drugs have long been used to improve health and extend lives. There are lots of benefits to the patients when we choose right choice of drug delivery. The practice of drug delivery has changed dramatically in the past few decades and even greater changes are anticipated in the near future. Pharmaceutical engineers have contributed substantially to our understanding of the physiological barriers to efficient drug delivery, such as transport in the circulatory system and drug movement through cells and tissues; they have also contributed to the development several new modes of drug delivery that have entered clinical practice.
Drug delivery systems control the rate at which a drug is released and the location in the body where it is released. Some systems can control both and many more.