<abstract xmlns="http://www.w3.org/1999/xhtml">Donepezil hydrochloride thermosensitive <italic>in situ</italic> gel for nasal delivery was prepared by using Poloxamer 407 and Poloxamer 188 as thermoreversible polymers, hydroxypropyl-<italic>β</italic>-cyclodextrin and ethylparaben as permeation enhancer and preservative, respectively. The gelation temperature and time, pH value of the gel formulation were found to meet the requirements for nasal administration. The <italic>in vitro</italic> erosion and <italic>in vitro</italic> release tests exhibited obvious drug sustained release behavior. Meantime, main pharmacokinetic parameters such as <italic>t</italic>max, <italic>c</italic>max and <italic>AUC</italic> in plasma as well as in brain were significantly different between the nasal gel formulation and intragastric drug solution in rats (<italic>p</italic> &lt; 0.01). The relative bioavailability and drug targeting efficiency of the gel formulation were calculated to be 385.6 and 151.2 %, respectively. Thus, the drug gel formulation might be a potential new delivery system for treatment of Alzheimer’s disease due to its higher bioavailability and better distribution to brain when compared to oral route.</abstract>

Donepezil hydrochloride thermosensitive in situ gel for nasal delivery was prepared by using Poloxamer 407 and Poloxamer 188 as thermoreversible polymers, hydroxypropyl-β-cyclodextrin and ethylparaben as permeation enhancer and preservative, respectively. The gelation temperature and time, pH value of the gel formulation were found to meet the requirements for nasal administration. The in vitro erosion and in vitro release tests exhibited obvious drug sustained release behavior. Meantime, main pharmacokinetic parameters such as tmax, cmax and AUC in plasma as well as in brain were significantly different between the nasal gel formulation and intragastric drug solution in rats (p < 0.01). The relative bioavailability and drug targeting efficiency of the gel formulation were calculated to be 385.6 and 151.2 %, respectively. Thus, the drug gel formulation might be a potential new delivery system for treatment of Alzheimer’s disease due to its higher bioavailability and better distribution to brain when compared to oral route.

Preparation, characterization, and <italic>in vivo</italic> pharmacokinetics of thermosensitive <italic>in situ</italic> nasal gel of donepezil hydrochloride

Acta Pharmaceutica

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Preparation, characterization, and  pharmacokinetics of thermosensitive  nasal gel of donepezil hydrochloride

Donepezil hydrochloride thermosensitive in situ gel for nasal delivery was prepared by using Poloxamer 407 and Poloxamer 188 as thermoreversible polymers,...

Preparation, characterization, and in vivo pharmacokinetics of thermosensitive in situ nasal gel of donepezil hydrochloride

Published Online: Feb 17, 2020

Page range: 411 - 422

Accepted: Nov 18, 2019

DOI: https://doi.org/10.2478/acph-2020-0032

Keywords
donepezil hydrochloride, thermosensitive gel, nasal delivery, bioavailability, brain targeting

© 2020 Fugen Gu et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Preparation, characterization, and in vivo pharmacokinetics of thermosensitive in situ nasal gel of donepezil hydrochloride

Published Online: Feb 17, 2020

Page range: 411 - 422

Accepted: Nov 18, 2019

DOI: https://doi.org/10.2478/acph-2020-0032

Keywordsdonepezil hydrochloride, thermosensitive gel, nasal delivery, bioavailability, brain targeting

© 2020 Fugen Gu et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
donepezil hydrochloride, thermosensitive gel, nasal delivery, bioavailability, brain targeting