Self-destructing transdermal therapeutic system having improved functionality and efficacy
The invention relates to a self-destructing transdermal therapeutic system (TTS), preferably in the form of a transdermal patch, that includes an active ingredient, an agent rendering the active ingredient useless, and a perforation mechanism. The perforation mechanism allows a mobile phase to reach the agent that is capable of rendering the active ingredient useless after removing the TTS after use. The agent then comes into contact with the active ingredient and destroys the active ingredient in the presence of the mobile phase.
1. 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.
2. The method of self-destroying a transdermal therapeutic system as claimed in claim 1 , wherein the method further comprises activating the agent which snakes the active ingredient useless via the mobile phase.
3. The method of self-destroying a transdermal therapeutic system as claimed in claim 1 , wherein the method further comprises chemically reacting the active ingredient and the agent which makes the active ingredient useless in the presence of the mobile phase.
4. The method of self-destroying a transdermal therapeutic system as claimed in claim 3 , wherein the agent which makes the active ingredient useless is an oxidizing agent.
5. The method of self-destroying a transdermal therapeutic system as claimed in claim 1 , wherein, said perforating step comprises distortive bending of said mechanical means for perforation during removal, thereby rotating at least one point in the internal region around pivots dictated by its geometry, by an angle of up to a maximum 90° out of a plane in a direction of an adjacent layer.
6. The method of self-destroying a transdermal therapeutic system as claimed in claim 5 , wherein said rotating step comprises rotating step comprises swiveling the point by an angle in the range from 20 to 90° through at least one adjacent layer.
7. The method of self-destroying a therapeutic system as claimed in claim 1 , wherein said liquid impermeable layer is a wall of a sealed pouch containing a liquid store and said method further comprises situating the mechanical means for perforation in said sealed pouch.
8. The method of self-destroying a therapeutic system as claimed in claim 1 , wherein said method further comprises filling a filter paper pouch with agent which makes the active ingredient useless in powder form.
9. A self-destructing transdermal therapeutic system comprising at least one active ingredient, at least one agent which makes the active ingredient useless, at least one separation between the active ingredient and the agent which makes the active ingredient useless, and at least one mechanical means for perforation, wherein said mechanical means for perforation possesses a blunt outer contour and a sharp or pointed internal region, said sharp or pointed internal region perforating the separation between the active ingredient and the agent which makes the active ingredient useless upon removal of the TTS after use, said perforation ensuring that a mobile phase can approach the agent which makes the active ingredient useless, thereby allowing the active ingredient and the agent which makes the active ingredient useless to come into contact with one another and destroy the active ingredient by this contact.
10. The self-destructing transdermal therapeutic system as claimed in claim 9 , wherein said sharp or pointed internal region has either (i) a Maltese cross-shape or (ii) a square-with-elongated corners-shape.
11. The self-destructing transdermal therapeutic system as claimed in claim 9 , wherein said mechanical means for perforation is formed from plastic ranging in thickness from 100 to 1000 microns.