The abuse potential of a bioavailable drug such as an opiate analgesic agent is reduced and its duration of action is extended by converting it to a poorly absorbed ester prodrug or other prodrug derivative prior to formulation. Unlike many existing sustained release formulations of active pharmaceutical agents wherein an active pharmaceutical agent can be released by chewing, crushing, or otherwise breaking tablets or capsule beads containing the active pharmaceutical agent, such mechanical processing of tablets or capsule beads containing a prodrug of this invention neither releases the active drug nor compromises the controlled conversion of prodrug to drug. Moreover, tablets and capsule beads containing prodrugs of this invention or other drugs can be formulated with a sufficient amount of a thickening agent such as hydroxypropylmethylcellulose or carboxymethylcellulose to impede inappropriate intravenous and nasal administration of formulations that are not indicated for these modes of administration.
将一种可
生物利用的药物,如阿片类镇痛剂,转化为吸收差的酯前药或其他前药衍
生物,然后进行制剂,可以降低其滥用潜力并延长其作用时间。与许多现有的持续释放制剂不同,其中活性药物可以通过咀嚼、压碎或破坏含有活性药物的片剂或胶囊珠释放,本发明的前药片剂或胶囊珠不会释放活性药物,也不会破坏前药转化为药物的控制。此外,含有本发明的前药或其他药物的片剂和胶囊珠可以配制足量的
增稠剂,如
羟丙甲纤维素或
羧甲基纤维素,以防止不适当的静脉和鼻腔给药,因为这些制剂并不适用于这些给药方式。