Abstract
Solid dispersions (SDs) containing co-carrier were developed to improve in vitro dissolution and in vivo pharmacokinetics of celecoxib (CXB). Various polymers, including PVP K30, PEG4000, PEG6000, Poloxamer 188, Eudragit E100 and colloidal SiO2, were studied in the preparation of CXB-containing SDs. Poloxamer 188 and Aerosil stood out in preliminary characterization. Further study was focused on the selection and characterization of optimum ratio of CXB and polymer in solid dispersions (CXB-Poloxamer 188-Aerosil, 1:5:1). Results exhibited remarkable enhancement of both the dissolution and bioavailability of CXB which retained an amorphous form in SD samples.
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