Lidoderm
"Like the many others that have written responses, I have been using Lidoderm patches for many years.  I began with the Brand Name and then CVS switched to the generic by ENDO.  If you can find this generic it works just like the original.  But recently they switched to the newly developed generic by Mylan.  Do not waste your money. They are highly ineffective.  Difficult to separate from the plastic and very stiff un-maleable.  Once applied the stiffness causes them to lift up, beginning with the corners and pretty soon the whole patch releases.  Obviously the adhesive doesn't work either.  I can't get them to stay on long enough to see if they even work - no where the recommended 12 hours which I have had no problem with on others!"