Bias in Wagner-Nelson Method Estimate of the Fraction of Drug Absorbed:Roles of Bioavailability and

• 作 者: Jiwen Zhang Chuan Li Libing Chen
• 机 构: Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, P.R.China, Cent
• 出 处: 首届亚洲药物制剂科学研讨会(1st Asian Pharmaceutical Science and Technolog
• 发表日期: 2007年12期
• 关键词: Absorption Wagner-Nelson Method Bioavailability Dissolution / Release Kinetics C

　　Purpose: To quantify the bias in the Wagner-Nelson (W-N) estimate of the fraction of drug absorbed resulting from the absolute bioavailability (F) and dissolution/release kinetics of the drug.Methods: The methodology was based on deduction of the W-N method.Results: The W-N method was merely approximately applicable when F was not far less than 100%, and the W-N method estimate of absorption is dependent upon the release kinetics.Conclusion: Two novel parameters have been established to evaluate the W-N method.