EFFECTS OF POROUS SILICA AS DRUG CARRIER ON THE FORMULATION OF EFFERVESCENT NYSTATIN VAGINAL TABLETS | ||||
| Bulletin of Pharmaceutical Sciences Assiut University | ||||
| Article 6, Volume 17, Issue 2, December 1994, Page 139-146 PDF (478.07 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/bfsa.1994.69800 | ||||
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| Authors | ||||
| S. M. Safwat1; A. S. Ali2; I. Abdel-Sabour3 | ||||
| 1Department of Pharmaceutics, Faculty of Pharmacy, Assiut University, Assiut, Egypt | ||||
| 2Department of Industrial Pharmacy, Faculty of Pharmacy, Assiut University, Assiut, Egypt | ||||
| 3Department of Microbiology and Immunology, Faculty of Medicine, Assiut University, Assiut, Egypt | ||||
| Abstract | ||||
| Nystatin was loaded into porous silica by solvent deposition technique. The physical and loaded drug mixtures were examined by DSC and powder X-ray diffractometry. The stability of the drug at different relative humidities at 25° in these systems was evaluated measuring the antimycotic effectiveness. The in-vitro dissolution of the drug from loaded mixtures was studied. The loaded mixtures were formulated into effervescent vaginal tablets. Physical characteristics and dissolution behavior of the prepared effervescent vaginal tablets were evaluated according to B.P. 1993 limits. DSC and powder X-ray diffraction results revealed that the drug was changed from crystalline to amorphous state depending on drug to carrier ratio. The drug was stable and retained its activity in loaded mixtures stored at 0 % relative humidity for 2 months at 25°. Transformation of the drug to the amorphous state in the loaded mixtures lead to enhancement of drug dissolution. The prepared effervescent vaginal tablets complied with the standard requirements of uniformity of weight, drug content, disintegration time, dissolution, hardness and friability tests. | ||||
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