| 摘要 |
Disclosed is a transdermal therapeutic system for administering an active ingredient through the skin comprising: a) a back layer, b) a reservoir on the back layer comprising b1) a first layer containing active ingredient, at least one gel former, at least one plasticizer, and a first polyisobutylene; and b2) a second layer containing active ingredient, at least one gel former, at least one plasticizer, and a second polyisobutylene, wherein the first polyisobutylene is different from the second polyisobutylene, wherein at least the first layer contains undissolved active ingredient in the form of active ingredient particles; and wherein the active ingredient is fentanyl or an analogue of the fentanyl. |
