Absorption Time to peak:0.75 hours; 2.5 hours (with food) Distribution 1. Vd:155 L 2. Protein binding:93% to 94% Metabolism CYP3A to nor-naldemedine (major); UGT1A3 to naldemedine 3-G (minor); also undergoes cleavage in the GI tract to form benzamidine and naldemedine carboxylic acid. Excretion Urine (57%; 16% to 18% as unchanged drug; 32% as benzamidine metabolite); feces (35%; 20% as benzamidine metabolite) Pharmakodynamics Half-life Elimination:11 hours
禁忌症
Hypersensitivity to naldemedine or any component of the formulation; GI obstruction (known or suspected) or at increased risk of recurrent obstruction.
懷孕分類
Adverse events were observed in some animal reproduction studies. Based on animal data, naldemedine may cross the placenta and cause opioid withdrawal in the fetus if administered during pregnancy.
哺乳分類
It is not known if naldemedine is present in breast milk.
Opioid-induced constipation: Oral: 0.2 mg once daily. Discontinue treatment if opioid pain medication is discontinued.
小兒調整劑量
腎功能調整劑量
No dosage adjustment necessary.
肝功能調整劑量
Mild to moderate impairment (Child-Pugh classes A and B): No dosage adjustment necessary. Severe impairment (Child-Pugh class C): Avoid use (has not been studied).