The invention relates to a novel solid transdermal therapeutic system with UV absorber which is particularly designed for photosensitive active pharmaceutical ingredients. The UV-stable transdermal therapeutic system (TTS) consists of a backing layer 1, of at least one active ingredient-containing matrix 2 and of a detachable protective film 3, it optionally being for an adhesive layer 4 and a separating layer 5 to be introduced between the backing layer 1 and the active ingredient-containing matrix 2. UV absorbers from the group of hydroxyphenyltriazines can be embedded in the backing layer 1 or in the active ingredient-containing matrix 2 or in the adhesive layer 4. The TTS according to the invention achieves high stability with a low concentration of UV absorber. It is thus possible in particular to avoid or reduce the risk of possible skin irritation.
