Provided are a PEG-naloxone conjugate of general formula (II) and a pharmaceutical composition comprising the conjugate. In the conjugate, n is an integer in the range of 1-20. Also provided is a three-branched or four-branched conjugate of PEG and naloxone. Structural modification of naloxone with a hydrophilic polymer improves the pharmacokinetic properties of the drug, increase the water solubility of naloxone, improve the in vivo distribution of the drug, reduce the side effects of naloxone on central nervous system, and relieve bowel dysfunction and constipation caused by chronic administration of opioids. Also provided are a pharmaceutical composition comprising the conjugate of the invention and use of the conjugate.
提供了一种P
EG-
纳洛酮结合物的一般式(II)以及包含该结合物的药物组合物。在结合物中,n为1-20的整数范围内的整数。还提供了P
EG和
纳洛酮的三支或四支结合物。通过使用亲
水性聚合物对
纳洛酮进行结构修饰,可以改善药物的药代动力学特性,增加
纳洛酮的
水溶性,改善药物在体内的分布,减少
纳洛酮对中枢神经系统的副作用,并缓解慢性阿片类药物的肠道功能障碍和便秘所致的不适。还提供了包含本发明结合物的药物组合物和使用该结合物的用途。