| abstract |
Transdermal therapeutic systems (TTS), the structure of which comprises an active substance-containing polymer matrix and a backing layer and contain at least one light-sensitive active substance, are characterized in that the TTS mentioned contain at least one colorless substance which absorbs in the UV region and does not have its own pharmacological Has effect, and which is dispersed or dissolved in the polymer matrix of the TTS and / or which is homogeneously distributed in the back layer of the TTS. |