I. Orienti et al., PROGESTERONE LOADED CHITOSAN MICROSPHERES EFFECT OF TRIETHYLENE GLYCOL GLUTARATE LINKED TO THE CHITOSAN MOLECULE ON DRUG-RELEASE, STP pharma sciences, 6(6), 1996, pp. 424-429
The preparation of microspheres of chitosan or chitosan linked to trie
thylene glycol glutarate containing progesterone is described and the
correlations between the formulative parameters and the functional pro
perties analysed. Higher loading levels and water uptake were observed
for the substituted micromatrices. Kinetics approaching zero order we
re observed in each case, and the approach was more evident for the ch
itosan substituted micromatrices. These effects are analysed in terms
of polymer/drug interactions as determined by the phase solubility dia
grams.