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  • Title: In vitro study on sustained release capsule formulation of acetazolamide.
    Author: Pandey VP, Kannan K, Manavalan R, Desai N.
    Journal: Boll Chim Farm; 2003 Oct; 142(8):357-60. PubMed ID: 15040467.
    Abstract:
    In the present study formulation of sustained release capsule of acetazolamide 250 mg was tried using nonpareil seeds. Nonpareil seeds were coated with drug, polyvinylpyrrolidone, glyceryl monostearate, microcrystalline wax, and glyceryl distearate either individually or in combination to achieve sustained release capsule 250 mg. In successful formulation 20% drug coated pellets and 80% wax coated pellets were taken. Wax coated pellets for successful formulation contained coating of microcrystalline wax and glyceryl distearate on drug coated pellets of the same concentration of 1.6% w/w. Successful formulated sustained release capsule 250 mg of acetazolamide was compared in in vitro study with theoretical sustained release formulation suggested by wagner and one marketed sustained release capsule 250 mg. Formulated capsule showed result superior to or on par with marketed capsule. For successful formulation pellets were filled in '1' size hard gelatin capsule and stability study was carried out in hot air over at room temperature and 45 degrees C for 5 weeks. The formulation was found stable in respect of drug content and release rate.
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