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Evaluation of single granule release characteristics of controlled release granules with porous ethylcellulose membrane

Journal of Analytical & Pharmaceutical Research
Hirano Hiroyuki, Yamahara Hiroshi  


A basic dissolution study of single granule in a controlled-release capsule formulations was conducted. Controlled-release granules were prepared using porous Ethylcellulose membranes, and single granule dissolution profiles was compared with those of the Japanese pharmacopoeia (JP) paddle method. Dissolution profile from one granule was found to be dependent on the solubility of the drug.


dissolution test, single granule, theophylline, diltiazem