1.Absorption of Drugs Drug at site of administration Absorption is the transfer of Absorption a drug from its site of (input) administration to the Drug in plasma bloodstream via one of 2 Distribution several mechanisms. Drug in tissues 3 Metabolism Metabolite(s)in tissues 4 Elimination (output) Drug and/or metabolite(s) in urine,bile,or feces 71.Absorption of Drugs Absorption is the transfer of a drug from its site of administration to the bloodstream via one of several mechanisms. 7