PMID- 38044946 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20231205 IS - 1663-9812 (Print) IS - 1663-9812 (Electronic) IS - 1663-9812 (Linking) VI - 14 DP - 2023 TI - Comparison of pharmacokinetics and safety between CE-fosphenytoin sodium, fosphenytoin sodium, and phenytoin sodium after intravenous and intramuscular administration in healthy volunteers. PG - 1204075 LID - 10.3389/fphar.2023.1204075 [doi] LID - 1204075 AB - Background: Captisol((R))-enabled-fosphenytoin sodium (CE-fosphenytoin sodium) injection is a modified formulation of fosphenytoin sodium. Objective: We aim to compare the intravenous and intramuscular bioavailability and safety between CE-fosphenytoin sodium, fosphenytoin sodium (Cerebyx((R))), and phenytoin sodium (intravenous injection only). Methods: In pivotal study 1, 54 subjects were divided into three sequence groups that receive intravenous injection of 250 mg of phenytoin sodium equivalent (PE), CE-fosphenytoin sodium (T), or fosphenytoin sodium (R1) and 250 mg of phenytoin sodium (R2) in period 1. After a 14-day washout period, 36 subjects were randomized to two treatment sequence groups (T-R1 or R1-T, n = 18 per group) in period 2, in which the subjects who received R2 in period 1 were removed, those who received T in period 1 used R1 (T-R1), while those who previously received R1 used T (R1-T). In pivotal study 2, a single intramuscular dose of T (400 mg PE) or R1 (400 mg PE) was administered according to the individual sequential treatment assignment in each period. There was a washout (14 days) period before receiving the next period study drug. Results: T and R1 have similar pharmacokinetic characteristics regarding total and free phenytoin, showing bioequivalence of both drugs in the intravenous and intramuscular administration. The geometric mean ratio was close to 1 (0.98-1.06). The AUC of total and free phenytoin in subjects who intravenously received T and R1 was very similar to those who received R2, although their C(max) was lower than that of the subjects who received R2. Overall, treatment with T and R1 was safe and well-tolerated, without serious adverse events (SAEs) or grade III adverse events (AEs). With intravenous (i.v.) or intramuscular (i.m.) treatment, the incidence of drug-related AEs using T was similar to that using R1. Treatment with T and R1 had clearly superior tolerability than that with R2. Conclusion: CE-fosphenytoin sodium is a promising substitute for fosphenytoin sodium. Clinical Trial Registration: http://www.chinadrugtrials.org.cn/, CTR20202154 (11 November 2020). CI - Copyright (c) 2023 Li, Wu, Sun, Jin, Han, Xu, Liu, Zhang, Wang, Wang, Zhang, Zhang, Liu and Ding. FAU - Li, Xiaojiao AU - Li X AD - Phase I Clinical Trial Center, The First Hospital of Jilin University, Changchun, China. FAU - Wu, Min AU - Wu M AD - Phase I Clinical Trial Center, The First Hospital of Jilin University, Changchun, China. FAU - Sun, Jixuan AU - Sun J AD - Phase I Clinical Trial Center, The First Hospital of Jilin University, Changchun, China. FAU - Jin, Weili AU - Jin W AD - Xi'an Xintong Pharmaceutical Research Co., Ltd., Xi'an, China. FAU - Han, Lei AU - Han L AD - Xi'an Xintong Pharmaceutical Research Co., Ltd., Xi'an, China. FAU - Xu, Jia AU - Xu J AD - Phase I Clinical Trial Center, The First Hospital of Jilin University, Changchun, China. FAU - Liu, Jingrui AU - Liu J AD - Phase I Clinical Trial Center, The First Hospital of Jilin University, Changchun, China. FAU - Zhang, Hong AU - Zhang H AD - Phase I Clinical Trial Center, The First Hospital of Jilin University, Changchun, China. FAU - Wang, Jing AU - Wang J AD - Phase I Clinical Trial Center, The First Hospital of Jilin University, Changchun, China. FAU - Wang, Daidi AU - Wang D AD - Xi'an Xintong Pharmaceutical Research Co., Ltd., Xi'an, China. FAU - Zhang, Hanyi AU - Zhang H AD - Xi'an Xintong Pharmaceutical Research Co., Ltd., Xi'an, China. FAU - Zhang, Qing AU - Zhang Q AD - Xi'an Xintong Pharmaceutical Research Co., Ltd., Xi'an, China. FAU - Liu, Nini AU - Liu N AD - Xi'an Xintong Pharmaceutical Research Co., Ltd., Xi'an, China. FAU - Ding, Yanhua AU - Ding Y AD - Phase I Clinical Trial Center, The First Hospital of Jilin University, Changchun, China. LA - eng PT - Journal Article DEP - 20231117 PL - Switzerland TA - Front Pharmacol JT - Frontiers in pharmacology JID - 101548923 PMC - PMC10691362 OTO - NOTNLM OT - CE-fosphenytoin sodium OT - fosphenytoin sodium OT - healthy volunteers OT - pharmacokinetics OT - safety COIS- Authors WJ, LH, DW, HZ, QZ, and NL are employed by Xi'an Xintong Pharmaceutical Research Co., Ltd. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2023/12/04 06:42 MHDA- 2023/12/04 06:43 PMCR- 2023/11/17 CRDT- 2023/12/04 04:25 PHST- 2023/04/12 00:00 [received] PHST- 2023/10/31 00:00 [accepted] PHST- 2023/12/04 06:43 [medline] PHST- 2023/12/04 06:42 [pubmed] PHST- 2023/12/04 04:25 [entrez] PHST- 2023/11/17 00:00 [pmc-release] AID - 1204075 [pii] AID - 10.3389/fphar.2023.1204075 [doi] PST - epublish SO - Front Pharmacol. 2023 Nov 17;14:1204075. doi: 10.3389/fphar.2023.1204075. eCollection 2023.