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Sri Sulihtyowati Soebagyo

Faculty of Pharmacy Universitas Gadjah Mada Yogyakarta

Author-ID : 3096736

Medicine & Pharmacology

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Articles

Optimization of celery (Apium graveolens L.) herb extract granule production using Fluidized Bed Granulator Mohammad Djatmiko; Sri Sulihtyowati Soebagyo; Suwijiyo Pramono; Sudibyo Martono
Indonesian Journal of Pharmacy Vol 20 No 2, 2009
Publisher : Faculty of Pharmacy Universitas Gadjah Mada, Yogyakarta, Skip Utara, 55281, Indonesia

Celery is an Indonesian herb being used as vegetable and medicinal purposes especially in hypotensive remedy. In order to produce a good quality of celery herb extract granules, a study on the influence of spray rate, level of lactose and Aerosil in fluidized bed granulator (FBG) toward homogeneity, flow rate and water content of granules was done.In the optimization process was programmed by factorial design, the maximum spray rate was 4 L/hours and the minimum was 2 L/hours, the maximum amount lactose was 100% and the minimum was 80% of extract weight, and Aerosil content maximal 20% and minimal 0% of extract weight. The optimum area of optimization result was found from superimposed contour plot granule parameters including homogeneity of apiin content, flow rate and moisture content of granules.The result showed that the Aerosil was proven to be disadvantageous in FBG process. The optimum area of optimization to obtain good granules was achieved by 2.75 L/hour to 2.00 1/hour of spray rate with the amount of lactose at 93.5% to 100% of extract weight with viscosity at 2.8 cP and density at 1.07 g/mL and without Aerosil. The granules possesed homogeneity of apiin with CV 3-5%, 0.85-1.00% of water content and 12.0-13.0 g/sec of flow rate.Key words: Celery (Apium graveolens L.), apiin, factorial design, extract, granules.

THE EFFECT OF REPEATED COMPACTION ON STARCH 1500 AS A FILLER-BINDER OF DIRECT COMPRESSION TABLET Sri Sulihtyowati Soebagyo; Muliyadi .
Indonesian Journal of Pharmacy Vol 12 No 4, 2001
Publisher : Faculty of Pharmacy Universitas Gadjah Mada, Yogyakarta, Skip Utara, 55281, Indonesia

Poor flowability is the weakness of Starch 1500 as a filler-binder of direct compression tablet. Granulation by compaction is one of the ways to improve the flow ability as it produced larger granules. Compaction of Starch 1500 (once) produced granules having flowability, compressibility and compactibility better than the original Starch 1500 powder. These granules, eventually, yielded tablets having higher hardness, less friable and longer disintegration time than that of the original Starch 1500. On twice compaction of Starch 1500, however, produced more fluid granules than previous method but the compressibility and compactibility tended to decrease. These type of granules yielded tablets having lower hardness and friability but higher disintegration time, significantly. Key words: Starch 1500, granule, flowability, compressibility, tablet properties

Optimization of theophylline sustained release tablet formula with HPMC, CMC Na and xanthan gum as matrix component Agus Siswanto; Sri Sulihtyowati Soebagyo
Indonesian Journal of Pharmacy Vol 17 No 3, 2006
Publisher : Faculty of Pharmacy Universitas Gadjah Mada, Yogyakarta, Skip Utara, 55281, Indonesia

Theophylline has a relatively short half-life (8,1 jam) with a narrow therapeutic window (10 – 20 μg/mL). Sustained-release formulation can produce more uniform serum concentrations with less fluctuation in peaktrough levels. The physical properties of tablet mass and the release profileof drug from hydrophilic matrices are influenced by properties of matrix components, i.e. HPMC (gelling agent), CMC-Na (did not show initial burst release), and xanthan gum (free flowing).The research was done with simplex lattice design (SLD) by using 3 component, i.e. HPMC (A), CMC-Na (B), and xanthan gum (C). Seven formula were obtained that are F1 (100% A), F2 (100% B), F3 (100% C), F4 (50% A & 50% B), F5 (50% B & 50% C), F6 (50% A & 50% C), dan F7 (33,33% A, 33,33% B, 33,33% C). The Optimization parameters of theophylline sustained-release were flow rate of the tablet mass, the compactibility of the tablet mass, and the release rate of theophylline.Based on SLD model; equations, contour plots, and superimposed of contour plots were obtained, by which the optimum formula was determined.Xanthan gum was the most dominant factor in increasing flowability and compactibility of theophylline tablet mass. HPMC was the most dominant factor in decreasing the dissolution rate of theophylline. The most dominant interaction effect to increase flowability and compactibility was the interaction of HPMC, CMC-Na, and xanthan gum. The most dominant interaction effect to increase correlation coefficient of zero order kinetics was the interaction HPMC and CMC-Na. Based on the superimposed contour plots, tablet formula consisting of HPMC (2,3 %), CMC-Na (18,6 %), and xanthan gum (79,1 %) is the optimum tablet formula.Key words: theophylline, HPMC, CMC-Na, xanthan gum, sustained-release

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