An orally administrable drug powder composition which forms a gastro-retentive RAFT having at least two trigger pulses is provided. The composition contains, at a minimum, (a) at least one GHB drug in a first pulse release which releases in less than about 3 hours; (b) at least one GHB drug in a delayed trigger release form; (c) at least one non-toxic gas generating agent; and (d) a RAFT system, wherein following oral ingestion, the composition provides a self-assembling gastro-retentive RAFT having entrapped therein, the at least one drug of (a) and (b) and the gas generated in situ by the non-toxic gas generating agent, thereby providing a floating gastro-retentive RAFT having a dual pulse system wherein at least the second pulse is a trigger pulse and which retains the at least one GHB drug in the stomach for at least about 3 hours.
本发明提供了一种可口服的药物粉末组合物,该组合物可形成具有至少两个触发脉冲的胃保留型 RAFT。该组合物至少包含:(a) 至少一种伽马--羟
丁酸(GHB)药物,以第一脉冲释放形式,在大约 3 小时内释放;(b) 至少一种伽马--羟
丁酸(GHB)药物,以延迟触发释放形式;(c) 至少一种无毒气体发生剂;(d) RAFT 系统,其中在口服后,组合物提供一种自组装的胃保留 RAFT,其中夹带有(a)和(b)中的至少一种药物以及由无毒气体发生剂在原位产生的气体,从而提供一种具有双脉冲系统的浮动胃保留 RAFT,其中至少第二个脉冲是触发脉冲,并将至少一种 GHB 药物保留在胃中至少约 3 小时。