Safe and effective drug delivery systems are critical to the successful treatment of a majority of diseases. In medical terminology, drug delivery refers to the entire procedure for administering a pharmaceutical compound with the purpose of achieving a therapeutic effect in human beings or in animals. There are several ways in which a drug can be administered into the body, including through the mouth, skin, nasal, vaginal, ocular, rectal and other such methods. Some newer techniques of drug delivery include targeted drug delivery, which enables the drug to be effective in a particular portion of the body only. Targeted drug delivery is commonly used in the treatment of cancerous tissue. Other drug delivery techniques include sustained drug release formulations. This ensures that a particular drug is released over an extended period of time and that too, in a controlled manner. Hide this