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Preparation And In Vitro Evaluation Of Verapamil HCl And Ibuprofen Containing Carrageenan Beads.

Oya Sipahigil, Betül Dortunç
Published 2001 · Chemistry, Medicine
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The objective of this study was to prepare and evaluate carrageenan beads as a controlled release system for a freely water soluble drug verapamil hydrochloride and a slightly water soluble drug ibuprofen. Beads were prepared by ionotropic gelation method. The influence of formulation factors (drug content, polymer concentration, counterion type and concentration, outer phase volume) on the particle size, encapsulation efficiency and in vitro release characteristics of beads was investigated. The encapsulation efficiency of veraparnil HCl in the beads (34.8-71.1%) was higher than that of ibuprofen (23.6-58%). While about 30% of ibuprofen was released at 6 h, about 70% of verapamil HCl was released in 5 h from the carrageenan beads prepared.



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