ABSTRACT
The term ‘‘parenteral’’ is applied to preparations administered by injection through one or more layers of skin tissue. The word is derived from the Greek words para and etheron, meaning outside of intestine, and is used for those dosage forms administered by routes other than the oral route. Because administration of injectables, by definition, requires circumventing the highly protective barriers of the human body, the skin and the mucus membranes, the purity of the dosage form must achieve exceptional quality. This is generally accomplished by close utilization of good manufacturing practices.
