Transderm Delivery System(TDS) is also called Transdermal Therapeutic System(TTS). It refers to a kind of preparation. Drug in this preparation can get through skin, be absorbed by capillary vessel and then go into systemic circulation and take effect.

• 经皮给药系统(Transderm Delivery System,TDS)又称经皮治疗系统(Transdermal Therapeutic System,TTS),它是指药物以一定速率通过皮肤经毛细血管吸收进入体循环产生药效的一类制剂。