United States for nearly 30 ... with other methods of drug delivery they are painless, ... The layers that comprise the reservoir type of patch. The protective peel strip is removed prior to. applying the patch to skin. Transdermal Drug Delivery: ... File Format: PDFAdobe Acrobat - Johnson & Johnson (J&J) - Alza - Transdermal Drug Delivery Patch, Extended Release Oral Medicine, Stock Symbol JNJ.