Prodrugs of meptazinol and other phenolic analgesics exhibiting low oral bioavailability with amino acids or lower peptides, pharmaceutical compositions containing such prodrugs and a method for providing pain relief with such prodrugs are provided. In addition, the present invention relates to methods for increasing the oral bioavailability of a phenolic analgesic. The method comprises orally administering a phenolic analgesic prodrug, wherein the phenolic analgesic is bound to an amino acid or peptide via a carbamate linkage, to a subject in need thereof. Prodrugs having side chains of valine, leucine, isoleucine and glycine amino acids and mono-, di- and tripeptides thereof are preferred.
                            本发明提供了美托津诺尔及其他表现出口服
生物利用度低的
酚类镇痛剂的前药,其与
氨基酸或较低的肽结合,以及含有这种前药的制药组合物和使用这种前药提供缓解疼痛的方法。此外,本发明还涉及提高
酚类镇痛剂口服
生物利用度的方法。该方法包括口服给予
酚类镇痛剂前药,其中
酚类镇痛剂通过
氨基酸或肽的
氨甲酰基链接结合到前药中,并给予需要的受试者。具有缬
氨酸、亮
氨酸、
异亮氨酸和甘
氨酸
氨基酸和其单、二、三肽的侧链的前药是首选。