PMID- 25352040 OWN - NLM STAT- MEDLINE DCOM- 20160314 LR - 20211203 IS - 1552-4604 (Electronic) IS - 0091-2700 (Linking) VI - 55 IP - 4 DP - 2015 Apr TI - Effect of faldaprevir on raltegravir pharmacokinetics in healthy volunteers. PG - 384-91 LID - 10.1002/jcph.418 [doi] AB - Faldaprevir is a potent hepatitis C virus (HCV) NS3/4A protease inhibitor and an inhibitor of UDP-glucuronosyltransferase-1A1 (UGT1A1), which is involved in raltegravir clearance. Raltegravir, an HIV integrase inhibitor, may be used in combination with HCV treatment in HCV/HIV co-infected patients. In this open-label, 2-period, fixed-sequence study, 24 healthy volunteers (12 males) received faldaprevir 240 mg and raltegravir 400 mg in 2 treatment schedules (A and B) separated by a washout phase of >/=7 days: (A) twice-daily raltegravir (Days 1-3), once-daily raltegravir (Day 4); (B) twice-daily raltegravir and twice-daily faldaprevir (loading dose, Day 1), twice-daily raltegravir and once-daily faldaprevir (Days 2-5), once-daily raltegravir and once-daily faldaprevir (Day 6). Pharmacokinetics and safety were assessed over 132 hours post-dosing. Compared with raltegravir alone, co-administration with faldaprevir led to 2.7-fold and 2.5-fold increases in raltegravir geometric mean AUC(tau,ss) and C(max,ss), respectively, and a similar increase in raltegravir glucuronide metabolite exposure. No serious adverse events (AEs) were reported and no subject discontinued due to AEs. Faldaprevir and raltegravir co-administration was well tolerated and resulted in a moderate increase in raltegravir exposure. CI - (c) 2014, The American College of Clinical Pharmacology. FAU - Joseph, David AU - Joseph D AD - Boehringer Ingelheim Pharmaceuticals, Inc., Ridgefield, CT, USA. FAU - Rose, Peter AU - Rose P FAU - Strelkowa, Natalja AU - Strelkowa N FAU - Schultz, Armin AU - Schultz A FAU - Garcia, Jeanette AU - Garcia J FAU - Elgadi, Mabrouk AU - Elgadi M FAU - Huang, Fenglei AU - Huang F LA - eng PT - Clinical Trial, Phase I PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20141208 PL - England TA - J Clin Pharmacol JT - Journal of clinical pharmacology JID - 0366372 RN - 0 (Aminoisobutyric Acids) RN - 0 (HIV Integrase Inhibitors) RN - 0 (Oligopeptides) RN - 0 (Protease Inhibitors) RN - 0 (Quinolines) RN - 0 (Thiazoles) RN - 43Y000U234 (Raltegravir Potassium) RN - 958X4J301A (faldaprevir) RN - 9DLQ4CIU6V (Proline) RN - EC 2.4.1.- (UGT1A1 enzyme) RN - EC 2.4.1.17 (Glucuronosyltransferase) RN - GMW67QNF9C (Leucine) SB - IM MH - Adult MH - Aminoisobutyric Acids MH - Drug Administration Schedule MH - Drug Interactions/genetics MH - Female MH - Genotype MH - Glucuronosyltransferase/genetics MH - HIV Integrase Inhibitors/administration & dosage/adverse effects/*pharmacokinetics MH - Healthy Volunteers MH - Humans MH - Leucine/analogs & derivatives MH - Male MH - Oligopeptides/administration & dosage/adverse effects/*pharmacology MH - Proline/analogs & derivatives MH - Protease Inhibitors/administration & dosage/adverse effects/*pharmacology MH - Quinolines MH - Raltegravir Potassium/administration & dosage/adverse effects/*pharmacokinetics MH - Thiazoles/administration & dosage/adverse effects/*pharmacology MH - Young Adult OTO - NOTNLM OT - HIV/AIDS OT - clinical trials OT - drug interactions OT - infectious diseases OT - pharmacokinetics and drug metabolism OT - virology EDAT- 2014/10/30 06:00 MHDA- 2016/03/15 06:00 CRDT- 2014/10/30 06:00 PHST- 2014/08/05 00:00 [received] PHST- 2014/10/20 00:00 [accepted] PHST- 2014/10/30 06:00 [entrez] PHST- 2014/10/30 06:00 [pubmed] PHST- 2016/03/15 06:00 [medline] AID - 10.1002/jcph.418 [doi] PST - ppublish SO - J Clin Pharmacol. 2015 Apr;55(4):384-91. doi: 10.1002/jcph.418. Epub 2014 Dec 8.