The document discusses various routes of drug administration other than oral administration. It addresses 12 different routes including buccal/sublingual, topical, intramuscular, subcutaneous, rectal, pulmonary, intranasal, intraocular, vaginal, and intravenous. For each route, it outlines key factors that influence drug absorption such as vascularity of the administration site, drug lipophilicity, and epithelial barriers. It also provides examples of drugs administered via different routes.