NDLI: Dynamic Dissolution Testing To Establish In Vitro/In Vivo Correlations for Montelukast Sodium, a Poorly Soluble Drug

Content Provider	Springer Nature Link
Author	Okumu, Arthur DiMaso, Marie Löbenberg, Raimar
Copyright Year	2008
Abstract	The objectives of the study was to develop a dissolution test method that can be used to predict the oral absorption of montelukast sodium, and to establish an in vitro/in vivo correlation (IVIVC) using computer simulations.Drug solubility was measured in different media. The dissolution behaviour of montelukast sodium 10 mg film coated tablets was studied using the flow-through cell dissolution method following a dynamic pH change protocol, as well as in the USP Apparatus 2. Computer simulations were performed using GastroPlus™. Biorelevant dissolution media (BDM) prepared using bile salts and lecithin in buffers was used as the dissolution media, as well as the USP simulated intestinal fluid (SIF) pH 6.8 and blank FaSSIF pH 6.5. Dissolution tests in the USP Apparatus 2 were performed under a constant pH condition, while the pH range used in the flow through cells was pH 2.0 to 7.5. The in vitro data were used as input functions into GastroPlus™ to simulate the in vivo profiles of the drug.The solubility of montelukast sodium was low at low pH, but increased as the pH was increased. There was no significant difference in solubility in the pH range of 5.0 to 7.5 in blank buffers, but the drug solubility was higher in biorelevant media compared with the corresponding blank buffers at the same pH. Using the flow through cells, the dissolution rate was fast in simulated gastric fluid containing 0.1% SLS. The dissolution rate slowed down when the medium was changed to FaSSIF pH 6.5 and increased when the medium was changed to FaSSIF medium at pH 7.5. In the USP Apparatus 2, better dissolution was observed in FaSSIF compared with the USP buffers and blank FaSSIF with similar pH values. Dissolution was incomplete with less than 10% of the drug dissolved in the USP-SIF, and was practically non existent in blank FaSSIF pH 6.5. The in vitro results of the dynamic dissolution test were able to predict the clinical data from a bioavailability study best.Dynamic dissolution testing using the flow through cell seems to be a powerful tool to establish in vitro/in vivo correlations for poorly soluble drugs as input function into GastroPlus.
Starting Page	2778
Ending Page	2785
Page Count	8
File Format	PDF
ISSN	07248741
Journal	Pharmaceutical Research
Volume Number	25
Issue Number	12
e-ISSN	1573904X
Language	English
Publisher	Springer US
Publisher Date	2008-06-17
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biomedical Engineering Medical Law Biochemistry Pharmacy Pharmacology/Toxicology
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Pharmacology Molecular Medicine Pharmacology (medical) Biotechnology Pharmaceutical Science

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