Formulation of Domperidone Microspheres Using a Combination of Locally Extracted Chitosan and Hpmc as Polymers

Commercially available domperidone -a D2 receptor antagonist-is an immediate release formulation which has never been formulated into microspheres for sustained release. The present work aims towards studying the effect of combination of a natural chitosan from an oyster shell of Mystilis edulis and HPMC (hydroxy propyl methyl cellulose) (spectracel 15 E) as polymer and tripolyphosphate as cross linking agent using wet gelation technique. The various polymer combination ratios for different batches were compared with a low molecular weight standard chitosan. The extracted chitosan -HPMC polymer combination ratios were chosen at ten levels: as batches B1, B2, B3, B4, B5, B6, B7, B8, B9, B10 for 1:1, 1:2, 2:1, 1:0, 0:1, 3:1, 1:3, 5:1, and 1:5 and 1:1 having 450:450,