Abstract
The need for producing sustained release
dosage form was increased (especially
for chronic diseases) to decrease side
effect, increase efficacy of treatment, so
it is now possible to administer the drugs
once a week to once a year.
Dexamethasone sodium Phosphate (DSP) is a potent corticosteroid used for the treatment of
many conditions like osteoarthritis (OA) and post joint replacement surgery.
Microencapsulated dexamethasone sodium phosphate (DSP) having continuous prolonged
release was prepared. To achieve that, DSP microcapsules were prepared using w/o/w double
emulsion method where PLGA was used as a polymer, PVA and glycerol as plasticizer and
Cetyl trimethyl ammonium bromide (CTAB) as emulsifying agent. Nine formulas of (PLGA
coated (DSP) (microcapsules) were prepared to study the effect of different variables on the
% yield and entrapment efficiency (EE) including the effect of internal aqueous phase
volume, presence of NaCl (as osmotic pressure enhancer), PLGA concentration, plasticizer
concentration and sonication time. The best formula was found to be formula (F1) containing
16 mg DSP coated with PLGA and found to give 85% EE and 94.19% yield.
Key words: Dexamethasone sodium phosphate (DSP), PLGA, GMO, entrapment efficiency,
% yield.
dosage form was increased (especially
for chronic diseases) to decrease side
effect, increase efficacy of treatment, so
it is now possible to administer the drugs
once a week to once a year.
Dexamethasone sodium Phosphate (DSP) is a potent corticosteroid used for the treatment of
many conditions like osteoarthritis (OA) and post joint replacement surgery.
Microencapsulated dexamethasone sodium phosphate (DSP) having continuous prolonged
release was prepared. To achieve that, DSP microcapsules were prepared using w/o/w double
emulsion method where PLGA was used as a polymer, PVA and glycerol as plasticizer and
Cetyl trimethyl ammonium bromide (CTAB) as emulsifying agent. Nine formulas of (PLGA
coated (DSP) (microcapsules) were prepared to study the effect of different variables on the
% yield and entrapment efficiency (EE) including the effect of internal aqueous phase
volume, presence of NaCl (as osmotic pressure enhancer), PLGA concentration, plasticizer
concentration and sonication time. The best formula was found to be formula (F1) containing
16 mg DSP coated with PLGA and found to give 85% EE and 94.19% yield.
Key words: Dexamethasone sodium phosphate (DSP), PLGA, GMO, entrapment efficiency,
% yield.
Keywords
% yield.
Dexamethasone sodium phosphate (DSP)
entrapment efficiency
GMO
PLGA