PMID- 34880961 OWN - NLM STAT- MEDLINE DCOM- 20220114 LR - 20220429 IS - 1918-1523 (Electronic) IS - 1203-6765 (Print) IS - 1203-6765 (Linking) VI - 2021 DP - 2021 TI - Pharmacokinetic Characterisation and Comparison of Bioavailability of Intranasal Fentanyl, Transmucosal, and Intravenous Administration through a Three-Way Crossover Study in 24 Healthy Volunteers. PG - 2887773 LID - 10.1155/2021/2887773 [doi] LID - 2887773 AB - BACKGROUND: For more than 60 years, the synthetic opioid fentanyl has been widely used in anaesthesia and analgesia. While the intravenous formulation is primarily used for general anaesthesia and intensive care settings, the drug's high lipophilic properties also allow various noninvasive routes of administration. Published data suggest that intranasal administration is also attractive for use as intranasal patient-controlled analgesia (PCA). A newly developed intranasal fentanyl formulation containing 47 mug fentanyl, intravenous fentanyl, and oral transmucosal fentanyl citrate were characterised, and bioavailability was compared to assess the suitability of the intranasal formulation for an intranasal PCA product. METHODS: 27 healthy volunteers were enrolled in a single-centre, open-label, randomised (order of treatments), single-dose study in a three-period crossover design. The pharmacokinetics of one intranasal puff of fentanyl formulation (47 mug, 140 mL per puff), one short intravenous infusion of 50 mug fentanyl, and one lozenge with an integrated applicator (200 mug fentanyl) were studied, and bioavailability was calculated. Blood samples were collected over 12 hours, and plasma concentrations of fentanyl were determined by HPLC with MS/MS detection. RESULTS: 24 volunteers completed the study. The geometric mean of AUC(0-tlast) was the highest with oral transmucosal administration (1106 h * pg/ml, CV% = 32.86), followed by intravenous (672 h * pg/ml, CV% = 32.18) and intranasal administration (515 h * pg/ml, CV% = 30.10). C (max) was 886 pg/ml (CV% = 59.38) for intravenous, 338 pg/ml (CV% = 45.61) for intranasal, and 310 pg/ml (CV% = 29.58) for oral transmucosal administration. t (max) was shortest for intravenous administration (0.06 h, SD = 0.056), followed by intranasal (0.21 h, SD = 0.078) and oral transmucosal administration (1.20 h, SD = 0.763). Dose-adjusted absolute bioavailability was determined to be 74.70% for the intranasal formulation and 41.25% for the oral transmucosal product. In total, 38 adverse events (AEs) occurred. Fourteen AEs were potentially related to the investigational items. No serious AE occurred. CONCLUSION: Pharmacokinetic parameters and bioavailability of the investigated intranasal fentanyl indicated suitability for its intended use as an intranasal PCA option. CI - Copyright (c) 2021 S. Nardi-Hiebl et al. FAU - Nardi-Hiebl, S AU - Nardi-Hiebl S AUID- ORCID: 0000-0003-3563-3505 AD - Department of Anaesthesia and Intensive Care, University Hospital Marburg, Marburg, Germany. FAU - Ndieyira, J W AU - Ndieyira JW AUID- ORCID: 0000-0002-3466-7327 AD - Division of Medicine, University College London, London, UK. FAU - Al Enzi, Y AU - Al Enzi Y AD - Department of Mathematics and Natural Science, Gulf University of Science and Technology, Mubarak Al-Abdullah, Kuwait. FAU - Al Akkad, W AU - Al Akkad W AUID- ORCID: 0000-0002-0109-3021 AD - Royal Free London Hospital, University College London, London, UK. FAU - Koch, T AU - Koch T AD - Department of Anaesthesia and Intensive Care, University Hospital Marburg, Marburg, Germany. FAU - Geldner, G AU - Geldner G AD - Department of Anaesthesiology Intensive Care Medicine Emergency Medicine and Pain Therapy, RKH Kliniken-Hospital Ludwigsburg, Ludwigsburg, Germany. FAU - Reyher, C AU - Reyher C AD - Department of Anaesthesiology Intensive Care Medicine Emergency Medicine and Pain Therapy, Klinikum Kassel GmbH, Kassel, Germany. FAU - Eberhart, L H J AU - Eberhart LHJ AD - Department of Anaesthesia and Intensive Care, University Hospital Marburg, Marburg, Germany. LA - eng PT - Journal Article PT - Randomized Controlled Trial DEP - 20211129 PL - United States TA - Pain Res Manag JT - Pain research & management JID - 9612504 RN - UF599785JZ (Fentanyl) SB - IM MH - Administration, Intranasal MH - Administration, Intravenous MH - Administration, Mucosal MH - Administration, Oral MH - Area Under Curve MH - Biological Availability MH - Cross-Over Studies MH - *Fentanyl MH - Healthy Volunteers MH - Humans MH - Infusions, Intravenous MH - *Tandem Mass Spectrometry PMC - PMC8648480 COIS- SNH and LE are co-inventors of the aforementioned intranasal PCA device under development. The other co-authors do not have anything to declare. EDAT- 2021/12/10 06:00 MHDA- 2022/01/15 06:00 PMCR- 2021/11/29 CRDT- 2021/12/09 07:01 PHST- 2021/10/04 00:00 [received] PHST- 2021/10/25 00:00 [revised] PHST- 2021/11/16 00:00 [accepted] PHST- 2021/12/09 07:01 [entrez] PHST- 2021/12/10 06:00 [pubmed] PHST- 2022/01/15 06:00 [medline] PHST- 2021/11/29 00:00 [pmc-release] AID - 10.1155/2021/2887773 [doi] PST - epublish SO - Pain Res Manag. 2021 Nov 29;2021:2887773. doi: 10.1155/2021/2887773. eCollection 2021.