is a process, during which pharmaceutical compounds are delivered to humans or animals. Methods of delivery include several routs, such as oral, nasal, pneumonial, rectal and several others. In order to work effectively, the drug needs to work in a controlled manner, which would control the circulation of the drug in the body. Targeted delivery occurs when the drug remains active within a specified territory of the body. Targeted drug delivery is especially important in cases, when the drug needs to affect a malicious turmoil, such as in cancerous tissues.