PMID- 28392509 OWN - NLM STAT- MEDLINE DCOM- 20170705 LR - 20220328 IS - 1347-5223 (Electronic) IS - 0009-2363 (Linking) VI - 65 IP - 6 DP - 2017 Jun 1 TI - Bioequivalence and Pharmacokinetic Profiles of Agomelatine 25-mg Tablets in Healthy Chinese Subjects: A Four-Way Replicate Crossover Study Demonstrating High Intra- and Inter-Individual Variations. PG - 524-529 LID - 10.1248/cpb.c16-00866 [doi] AB - The present study was designed to assess the bioequivalence of two agomelatine formulations (25-mg tablets) in healthy Chinese male subjects. This single-dose, open-label, randomized, four-way replicate study with a 1-week washout period was conducted in 60 healthy Chinese male volunteers under fasting conditions. Blood samples were collected over a 12-h period after a single dose of the 25-mg agomelatine test (T) formulation or a reference (R) formulation, and the drug concentrations were assayed by liquid chromatography tandem mass spectrometry (LC-MS/MS). Pharmacokinetic parameters were calculated using a non-compartmental model. Bioequivalence between the formulations was assessed. Tolerability and safety were monitored by physical examination, electrocardiogram (12-lead ECG), clinical laboratory tests, and adverse events (AEs). A total of 56 out of 60 subjects completed the study. No AEs were observed. The values of maximum plasma concentration (C(max)), maximum concentration (T(max)), area under curve (AUC)(0-t) and t(1/2) were 12.032 ng/mL, 0.658 h, 12.637 ng.h/mL, and 0.813 h, respectively, for the test formulation, and 10.891 ng/mL, 0.709 h, 11.572 ng.h/mL, and 0.96 h, respectively, for the reference formulation. The intra-individual variability of C(max) and AUC(0-t) were 78.3 and 61.8%, respectively. The inter-individual coefficients of variance (CVs) of C(max) and AUC(0-t) were approximately 100%. The 90% confidence intervals for the ratio of means for the log-transformed C(max) (97.7-124.9%), AUC(0-t) (98.2-118%), and AUC(0-infinity) (97.8-117.2%) were within the guideline range of bioequivalence (80-125%). The test and reference formulations of agomelatine met the regulatory criteria for bioequivalence of the Chinese Food and Drug Administration. Significant intra-individual and inter-individual variations were found. FAU - Li, Cuiyun AU - Li C AD - Phase I Clinical Unit, China-Frontage USA, The First Hospital of Jilin University. FAU - Xu, Jing AU - Xu J AD - Department of Neurology, The First Hospital of Jilin University. FAU - Zheng, Yan AU - Zheng Y AD - Department of Geriatrics, The First Hospital of Jilin University. FAU - Chen, Guiling AU - Chen G AD - Phase I Clinical Unit, China-Frontage USA, The First Hospital of Jilin University. FAU - Wang, Jianmeng AU - Wang J AD - Department of Geriatrics, The First Hospital of Jilin University. FAU - Ma, Liying AU - Ma L AD - The Second Hospital of Jilin. FAU - Qiao, Yan AU - Qiao Y AD - Department of Clinical Laboratory, The Second Hospital of Jilin. FAU - Niu, Junqi AU - Niu J AD - Department of Hepatology, The First Hospital of Jilin University. FAU - Wu, Min AU - Wu M AD - Phase I Clinical Unit, China-Frontage USA, The First Hospital of Jilin University. FAU - Zhang, Hong AU - Zhang H AD - Phase I Clinical Unit, China-Frontage USA, The First Hospital of Jilin University. FAU - Li, Xiaojiiao AU - Li X AD - Phase I Clinical Unit, China-Frontage USA, The First Hospital of Jilin University. FAU - Chen, Hong AU - Chen H AD - Phase I Clinical Unit, China-Frontage USA, The First Hospital of Jilin University. FAU - Zhu, Xiaoxue AU - Zhu X AD - Phase I Clinical Unit, China-Frontage USA, The First Hospital of Jilin University. FAU - Liu, Chengjiao AU - Liu C AD - Phase I Clinical Unit, China-Frontage USA, The First Hospital of Jilin University. FAU - Ding, Yanhua AU - Ding Y AD - Phase I Clinical Unit, China-Frontage USA, The First Hospital of Jilin University. LA - eng PT - Journal Article DEP - 20170408 PL - Japan TA - Chem Pharm Bull (Tokyo) JT - Chemical & pharmaceutical bulletin JID - 0377775 RN - 0 (Acetamides) RN - 0 (Hypnotics and Sedatives) RN - 0 (Tablets) RN - 137R1N49AD (agomelatine) SB - IM MH - Acetamides/adverse effects/blood/*pharmacokinetics MH - Adolescent MH - Adult MH - Area Under Curve MH - China MH - Cross-Over Studies MH - Half-Life MH - Healthy Volunteers MH - Humans MH - Hypnotics and Sedatives/adverse effects/blood/*pharmacokinetics MH - *Tablets MH - Therapeutic Equivalency MH - Young Adult OTO - NOTNLM OT - agomelatine OT - bioequivalence OT - inter-individual variation OT - intra-individual OT - pharmacokinetic EDAT- 2017/04/11 06:00 MHDA- 2017/07/06 06:00 CRDT- 2017/04/11 06:00 PHST- 2017/04/11 06:00 [pubmed] PHST- 2017/07/06 06:00 [medline] PHST- 2017/04/11 06:00 [entrez] AID - 10.1248/cpb.c16-00866 [doi] PST - ppublish SO - Chem Pharm Bull (Tokyo). 2017 Jun 1;65(6):524-529. doi: 10.1248/cpb.c16-00866. Epub 2017 Apr 8.