Evaluation of the Release Profiles of Ibuprofen Formulated from Carnuba Wax and Homolipid Capra hircus

Purpose: To investigate the sustained release characteristics of ibuprofen lipospheres made from Capra hircus (GF) and carnauba wax (CW) in comparison with conventional granules as standard. Methods: Ibuprofen (90 g) and the lipid (30 g) were prepared by melt dispersion technique. Conventional granules of ibuprofen were prepared with starch mucilage, 20% w/v. Resulting lipospheres were characterized with respect to sizes, flow property, bulk and tap densities, encapsulated in hard gelatin capsules and evaluated for drug release profiles. Results: Dissolution profile for lipospheres were a maximum drug release of 97% in 1 hr (conventional granules), 23% in 4 hr (GF), 60% in 2 hr (CW) and 40% in admixtures of fats (GC). Admixing the fats enhanced flow properties of the lipospheres. Inclusion of a surfactant enhanced the release profiles from the lipospheres. Conclusion: Formulation of ibuprofen into lipospheres modified the release profile, which has implications in the formulation of sustained release multiunit dosage forms.