parenteral administration

…two general methods: enteral and parenteral administration. Enteral administration involves the esophagus, stomach, and small and large intestines (i.e., the gastrointestinal tract). Methods of administration include oral, sublingual (dissolving the drug under the tongue), and rectal. Parenteral routes, which do not involve the gastrointestinal tract, include intravenous

Parenteral dosage forms are intended for administration as an injection or infusion. Common injection types are intravenous (into a vein), subcutaneous (under the skin), and intramuscular (into muscle). Infusions typically are given by intravenous route. Parenteral dosage forms

…sometimes death by means of parenteral contact (i.e., by bringing poisons into the body other than through the digestive tract) constitute environmental hazards. Biotoxic agents may produce their injurious effects by becoming involved in the food supply; ingestion of a poisonous microbial organism, plant, or marine animal or one of…