Medicines can be administered through various routes, including: 1. Oral (by mouth) 2. Topical (on the skin) 3. Intravenous (into a vein) 4. Intramuscular (into a muscle) 5. Subcutaneous (under the skin) "Absorption Process" Once a medicine is administered, it undergoes the following steps: 1. Ingestion:- The medicine is taken orally, and it enters the stomach. 2. Dissolution:- The medicine dissolves in the stomach acid and digestive enzymes. 3. Absorption:- The dissolved medicine is absorbed into the bloodstream through the walls of the stomach and small intestine. 4. Distribution:- The absorbed medicine is carried to the liver via the hepatic portal vein. 5. Metabolism:- The liver metabolizes the medicine, breaking it down into its active ingredients. 6. Systemic Circulation:- The metabolized medicine enters the systemic circulation, where it is carried to the target site of action.