PMID- 23829508 OWN - NLM STAT- MEDLINE DCOM- 20151109 LR - 20181202 IS - 1742-7843 (Electronic) IS - 1742-7835 (Linking) VI - 113 IP - 6 DP - 2013 Dec TI - Sustained Increase in the Oral Bioavailability of Loperamide after a Single Oral Dose of HM30181, a P-glycoprotein Inhibitor, in Healthy Male Participants. PG - 419-24 LID - 10.1111/bcpt.12108 [doi] AB - HM30181 is a new P-glycoprotein (P-gp) inhibitor. This study was conducted to investigate the effect of HM30181 and its duration of action on P-gp inhibition using loperamide as a probe drug. An open-label, five-period, fixed-sequence, cross-over study was conducted in 25 healthy Korean participants, who received a single oral dose of loperamide at 16 mg in five periods lasting for 17 days. In period II, participants also randomly received a single oral dose of HM30181 at 1, 5, 10, 15 mg simultaneously with loperamide. Serial pharmacokinetic blood samples were obtained up to 72 and 336 hr after loperamide and HM30181 administration, respectively. A mixed-effects analysis was performed to compare the area under the plasma concentration versus time curve from time 0 to 72 hr (AUC0-72 hr ) between periods and HM30181 dose groups. Tolerability was also assessed. The AUC0-72 hr of repeatedly administered loperamide was significantly increased 1.18-1.62 times for up to 14 days after a single oral administration of HM30181, particularly at doses >/=10 mg although the between-group difference failed to reach statistical significance. Plasma HM30181 was not detected in many participants including none at any sampling points beyond 48 hr after administration. Most adverse events (AEs) were mild to moderate and resolved spontaneously. The oral bioavailability of loperamide was significantly enhanced by a single oral administration of HM30181, which was sustained for up to 14 days. HM30181 was well tolerated in this selected population. CI - (c) 2013 Nordic Pharmacological Society. Published by John Wiley & Sons Ltd. FAU - Cha, Yu-Jung AU - Cha YJ AD - Department of Clinical Pharmacology and Therapeutics, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Korea. FAU - Lee, Howard AU - Lee H AD - Clinical Trials Center, Seoul National University Hospital, Seoul, Korea. FAU - Gu, Namyi AU - Gu N AD - Department of Clinical Pharmacology and Therapeutics, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Korea. FAU - Kim, Tae-Eun AU - Kim TE AD - Department of Clinical Pharmacology and Therapeutics, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Korea. FAU - Lim, Kyoung S AU - Lim KS AD - Department of Clinical Pharmacology and Therapeutics, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Korea. FAU - Yoon, Seo H AU - Yoon SH AD - Department of Clinical Pharmacology and Therapeutics, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Korea. FAU - Chung, Jae-Yong AU - Chung JY AD - Department of Clinical Pharmacology and Therapeutics, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Korea. FAU - Jang, In-Jin AU - Jang IJ AD - Department of Clinical Pharmacology and Therapeutics, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Korea. FAU - Shin, Sang-Goo AU - Shin SG AD - Department of Clinical Pharmacology and Therapeutics, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Korea. FAU - Yu, Kyung-Sang AU - Yu KS AD - Department of Clinical Pharmacology and Therapeutics, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Korea. FAU - Cho, Joo-Youn AU - Cho JY AD - Department of Clinical Pharmacology and Therapeutics, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Korea. LA - eng PT - Journal Article PT - Randomized Controlled Trial PT - Research Support, Non-U.S. Gov't DEP - 20130807 PL - England TA - Basic Clin Pharmacol Toxicol JT - Basic & clinical pharmacology & toxicology JID - 101208422 RN - 0 (4-oxo-4H-chromene-2-carboxylic acid (2-(2-(4-(2-(6,7-dimethoxy-3,4-dihydro-1H-isoquinolin-2-yl)-ethyl)-phenyl)-2H-tetrazol-5-yl)-4,5-dimethoxyphenyl)amide) RN - 0 (ATP Binding Cassette Transporter, Subfamily B, Member 1) RN - 0 (Benzopyrans) RN - 0 (Isoquinolines) RN - 0 (Tetrazoles) RN - 6X9OC3H4II (Loperamide) SB - IM MH - ATP Binding Cassette Transporter, Subfamily B, Member 1/*antagonists & inhibitors MH - Administration, Oral MH - Adult MH - Benzopyrans/*pharmacology MH - Biological Availability MH - Cross-Over Studies MH - Dose-Response Relationship, Drug MH - Drug Synergism MH - Humans MH - Isoquinolines/*pharmacology MH - Loperamide/*pharmacokinetics MH - Male MH - Middle Aged MH - Tetrazoles/*pharmacology MH - Young Adult EDAT- 2013/07/09 06:00 MHDA- 2015/11/10 06:00 CRDT- 2013/07/09 06:00 PHST- 2013/05/10 00:00 [received] PHST- 2013/06/28 00:00 [accepted] PHST- 2013/07/09 06:00 [entrez] PHST- 2013/07/09 06:00 [pubmed] PHST- 2015/11/10 06:00 [medline] AID - 10.1111/bcpt.12108 [doi] PST - ppublish SO - Basic Clin Pharmacol Toxicol. 2013 Dec;113(6):419-24. doi: 10.1111/bcpt.12108. Epub 2013 Aug 7.