Patent ID: 8894621

Claim:
A method of self-destroying a transdermal therapeutic system comprising providing a transdermal therapeutic system comprising at least one active ingredient, at least one agent which makes the active ingredient useless, at least one separation layer permeable to liquids but impermeable to solids between the active ingredient and the agent which makes the active ingredient useless, and at least one mechanical means for perforation adjacent a liquid impermeable layer, said mechanical means for perforation possessing a blunt outer contour and a sharp or pointed internal region, applying the transdermal therapeutic system to a patient's skin; removing the transdermal therapeutic system from the patient's skin and thereby perforating the liquid impermeable layer with the sharp or pointed internal region of the mechanical means for perforation, said perforating step ensuring that a mobile phase can approach the agent which makes the active ingredient useless, and contacting the active ingredient and the agent which makes the active ingredient useless with one another, thereby destroying the active ingredient by this contact.