The invention provides an improved electrotransport drug delivery system for analgesic drugs, namely fentanyl and sufentanil. The fentanyl/sufentanil is provided as a water soluble salt (eg, fentanyl hydrochloride) dispersed in a hydrogel formulation for use in an electrotransport device (
10
). In accordance with one aspect of the invention, the concentration of fentanyl/sufentanil in the donor reservoir (
26
) solution is above a predetermined minimum concentration, whereby the transdermal electrotransport flux of fentanyl/sufentanil is maintained independent of the concentration of fentanyl/sufentanil in solution. In accordance with a second aspect of the present invention, the donor reservoir (
26
) of the electrotransport delivery device (
10
) is comprised of silver and the donor reservoir (
26
) contains a predetermined “excess” loading of fentanyl/sufentanil halide to prevent silver ion migration with attendant skin discoloration. In accordance with a third aspect of the present invention, a transdermal electrotransport delivered dose of fentanyl/sufentanil is provided which is sufficient to induce analgesia in (eg, adult) human patients suffering from moderate-to-severe pain associated with major surgical procedures.
本发明提供了一种用于
镇痛药物(即
芬太尼和
舒芬太尼)的改进型电传输给药系统。
芬太尼/
舒芬太尼以
水溶性盐(如
盐酸芬太尼)的形式分散在
水凝胶配方中,用于电传输装置 (
10
).根据本发明的一个方面,供体储存库中的
芬太尼/
舒芬太尼浓度 (
26
)溶液中的
芬太尼/
舒芬太尼浓度高于预定的最低浓度,从而维持
芬太尼/
舒芬太尼的透皮电传输通量与溶液中的
芬太尼/
舒芬太尼浓度无关。根据本发明的第二方面,供体贮槽 (
26
)的供体储液器(
10
)由
银构成,供体储存器(
26
)含有预定的 "过量 "
芬太尼/
舒芬太尼卤化物,以防止
银离子迁移和随之而来的皮肤变色。根据本发明的第三个方面,本发明提供了一种经皮电传输的
芬太尼/
舒芬太尼剂量,该剂量足以诱导患有与大型外科手术相关的中度至重度疼痛的人类(例如成人)患者镇痛。