| umls-concept:C0994894 | skos:definition | NCI: A drug delivery system that often contains an adhesive backing that is usually applied to an external site on the body. Its ingredients either passively diffuse from, or are actively transported from, some portion of the patch. Depending upon the patch, the ingredients are either delivered to the outer surface of the body or into the body. A patch is sometimes synonymous with the terms Extended Release Film and System. (NCI),NCI: A solid composed of an impermeable occlusive backing and a formulation matrix in which the active and/or inert ingredient(s) are dissolved or dispersed; possibly includes an adhesive layer.,CHV: drug delivery method,CHV: drug delivery method,CHV: drug delivery method,CHV: drug delivery method,CHV: drug delivery method,HL7V3.0: <p>A drug delivery system that contains an adhesived backing and that permits its ingredients to diffuse from some portion of it (e.g., the backing itself, a reservoir, the adhesive, or some other component) into the body from the external site where it is | lld:umls |
