The present invention comprises a composition comprising a matrix (12) adapted to be placed in drug- and permeation-enhancing mixture-transmitting relation to a selected skin (18) or other body site. The matrix (12) contains sufficient amounts of drug, permeation enhancer(s) and poly-N-vinyl amide to...http://www.google.es/patents/US6248348?utm_source=gb-gplus-sharePatente US6248348 - Incorporating poly-N-vinly amide in a transdermal system
Incorporating poly-N-vinly amide in a transdermal system
