Abstract

Fexofenadine is the therapeutically active compound of the originally marketed drug, terfenadine, which upon accumulation was found to be associated with prolonged QTc intervals, torsades de point, and sudden death. Less than 5% of the drug, fexofenadine, is metabolized, therefore, the cytochrome P4503A interactions are not a factor. However, concomitant administration of fexofenadine with the potent CYP3A inhibitors (also p-glycoprotein inhibitors), erythromycin and ketoconazole, leads to a substantial increase in fexofenadine AUC. The precise mechanism of this interaction is not clear, but may involve the inhibition of p-glycoprotein. The primary goal of this study is to determine if rifampin alters the clearance of fexofenadine and if so, whether age has any effect on the clearance. Changes in fexofenadine clearance may reflect alteration in p-glycoprotein activity.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
General Clinical Research Centers Program (M01)
Project #
2M01RR000750-28
Application #
6307217
Study Section
Project Start
1999-12-01
Project End
2000-11-30
Budget Start
Budget End
Support Year
28
Fiscal Year
2000
Total Cost
Indirect Cost

  Institution

Name
Indiana University-Purdue University at Indianapolis
Department
Type
DUNS #
005436803
City
Indianapolis
State
IN
Country
United States
Zip Code
46202

  Publications

Robinson-Cohen, Cassianne; Bartz, Traci M; Lai, Dongbing et al. (2018) Genetic Variants Associated with Circulating Fibroblast Growth Factor 23. J Am Soc Nephrol 29:2583-2592
Askie, Lisa M; Darlow, Brian A; Finer, Neil et al. (2018) Association Between Oxygen Saturation Targeting and Death or Disability in Extremely Preterm Infants in the Neonatal Oxygenation Prospective Meta-analysis Collaboration. JAMA 319:2190-2201
Srinivasan, Lakshmi; Page, Grier; Kirpalani, Haresh et al. (2017) Genome-wide association study of sepsis in extremely premature infants. Arch Dis Child Fetal Neonatal Ed 102:F439-F445
Gupta, Samir K; Yeh, Eunice; Kitch, Douglas W et al. (2017) Bone mineral density reductions after tenofovir disoproxil fumarate initiation and changes in phosphaturia: a secondary analysis of ACTG A5224s. J Antimicrob Chemother 72:2042-2048
Robarge, Jason D; Desta, Zereunesay; Nguyen, Anne T et al. (2017) Effects of exemestane and letrozole therapy on plasma concentrations of estrogens in a randomized trial of postmenopausal women with breast cancer. Breast Cancer Res Treat 161:453-461
Hertz, Daniel L; Speth, Kelly A; Kidwell, Kelley M et al. (2017) Variable aromatase inhibitor plasma concentrations do not correlate with circulating estrogen concentrations in post-menopausal breast cancer patients. Breast Cancer Res Treat 165:659-668
Patel, Yash R; Kirkman, M Sue; Considine, Robert V et al. (2017) Retinopathy predicts progression of fasting plasma glucose: An Early Diabetes Intervention Program (EDIP) analysis. J Diabetes Complications 31:605-610
Robarge, Jason D; Metzger, Ingrid F; Lu, Jessica et al. (2017) Population Pharmacokinetic Modeling To Estimate the Contributions of Genetic and Nongenetic Factors to Efavirenz Disposition. Antimicrob Agents Chemother 61:
Hertz, D L; Kidwell, K M; Seewald, N J et al. (2017) Polymorphisms in drug-metabolizing enzymes and steady-state exemestane concentration in postmenopausal patients with breast cancer. Pharmacogenomics J 17:521-527
Kadakia, Kunal C; Kidwell, Kelley M; Seewald, Nicholas J et al. (2017) Prospective assessment of patient-reported outcomes and estradiol and drug concentrations in patients experiencing toxicity from adjuvant aromatase inhibitors. Breast Cancer Res Treat 164:411-419

Showing the most recent 10 out of 767 publications