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Surface drug removal from ibuprofen-loaded PLA microspheres by Eliana Leo; Flavio Forni; Maria Teresa Bernabei is a Pharmacology, Toxicology and Pharmaceutics article available to read on EtoBox.

What is Surface drug removal from ibuprofen-loaded PLA microspheres about?

The preparation, characterisation and drug release behaviour of ibuprofen loaded poly(D,L-lactic acid) (PLA) microspheres are described. Depending on the gelatin concentration in the aqueous external solution (1, 0.5, 0.1% w/v), microspheres with three different sizes (2.2, 4.1, 7.5 mm) were obtained. The properties of microspheres washed with water (Untreated microspheres) (Un-Ms) were compared to those of the microspheres washed with a sodium carbonate solution in order to remove the surface drug (treated microspheres) (T-Ms). The results indicate that the removal of the surface drug did not induce any change in the size of the microspheres whereas the morphology of the smallest T-Ms appeared to be modified. The release profiles of both Un-Ms and T-Ms resulted in biphasic patterns. The initial burst effect (first release phase) of the T-Ms was lower than that of the Un-Ms. The rate of the second release phase did not change for the microspheres with the biggest size but increased for the smallest microspheres probably owing to the modification of the matrix porosity.

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Author

Eliana Leo; Flavio Forni; Maria Teresa Bernabei

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0378-5173)

Published

2000

Language

EN

Field

Pharmacology, Toxicology and Pharmaceutics (Life Sciences)